Toyota Avalon (XX50): Lighting System(for Gasoline Model Without Cornering Light)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Exterior / Lighting (ext) / Lighting System(for Gasoline Model Without Cornering Light)

Automatic High Beam Switch Indicator does not Come ON

DESCRIPTION

When the automatic high beam system is on, the main body ECU (multiplex network body ECU) illuminates the auto high beam switch indicator.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

    Click here

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Main Body > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Automatic High Beam Switch Light

Auto high beam switch indicator light

OFF or ON

-
Body Electrical > Main Body > Active Test

Tester Display

Automatic High Beam Switch Light

OK:

Auto high beam switch indicator light illuminates.

OK

USE SIMULATION METHOD TO CHECK

NG

2.

INSPECT AUTO HIGH BEAM SWITCH

(a) Remove the auto high beam switch.

Click here

(b) Inspect the auto high beam switch.

Click here

NG

REPLACE AUTO HIGH BEAM SWITCH

OK

3.

CHECK HARNESS AND CONNECTOR (POWER SOURCE - AUTO HIGH BEAM SWITCH)

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

G31-3 (IND+) - Body ground

Always

11 to 14 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

CHECK HARNESS AND CONNECTOR (AUTO HIGH BEAM SWITCH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the G32 main body ECU (multiplex network body ECU) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

G31-4 (AZBI) - G32-23 (AHID)

Always

Below 1 Ω

G31-4 (AZBI) or G32-23 (AHID) - Body ground

Always

10 kΩ or higher
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Automatic High Beam System does not Operate or Operation Indicator does not Illuminate

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the automatic high beam system based on signals received from the forward recognition camera.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

    Click here

  • When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle. As a result, a DTC may be stored.
  • If the forward recognition camera has been replaced with a new one, be sure to perform Forward Recognition Camera Learning.

    Click here

  • Before performing troubleshooting, check that the low beam headlights and high beam headlights illuminate correctly.
  • When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
  • When the forward recognition camera cannot correctly detect objects due to inclement weather such as thick fog or other visual obstructions, the automatic high beam indicator may not turn on and consequently the automatic high beam system may not operate.
  • Before performing troubleshooting, check that the pre-collision system DTCs are not output.

    Click here

PROCEDURE

1.

READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Chassis / Front Recognition Camera / Data List.

(e) Read the Data List according to the display on the Techstream.

Chassis > Front Recognition Camera > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

High Temperature Status1

High temperature malfunction status

OFF or ON

OFF: Forward recognition camera high temperature malfunction does not exist

ON: Forward recognition camera high temperature malfunction exists

-
Chassis > Front Recognition Camera > Data List

Tester Display

High Temperature Status1

OK:

"OFF" is displayed on the Techstream.

HINT:

If "ON" is displayed, move the vehicle to a cool place and allow the temperature of the forward recognition camera to decrease before continuing with troubleshooting.

NG

END (TEMPORARY SUSPENSION OF AUTOMATIC HIGH BEAM SYSTEM DUE TO HIGH FORWARD RECOGNITION CAMERA TEMPERATURE)
OK

2.

CHECK AUTOMATIC HIGH BEAM INDICATOR LIGHT

(a) Check the operation of the automatic high beam indicator light.

(1) Turn the engine switch on (IG).

(2) Turn the light control switch to the AUTO or head position.

(3) Cover the automatic light control sensor to turn the low beam headlights on.

(4) Move the dimmer switch to the high position.

(5) Press the auto high beam switch.

Result

Proceed to

OK (The automatic high beam indicator light and the auto high beam switch indicator illuminate)

A

NG (Automatic high beam indicator light does not illuminate)

B

NG (Auto high beam switch indicator does not illuminate)

C

NG (Automatic high beam indicator light and auto high beam switch indicator do not operate)

D
B

GO TO STEP 5

C

GO TO OTHER PROBLEM (Proceed to Automatic High Beam Switch Indicator does not Come ON)

D

GO TO STEP 6

A

3.

READ VALUE USING TECHSTREAM

*1

Forward Recognition Camera

(Automatic High Beam Sensor)

*2

Work Light or Equivalent

*a

100 mm or less

(a) Shine a light on the automatic high beam sensor.

HINT:

If troubleshooting is being performed in a bright area, such as outside on a sunny day, it will not be necessary to perform this step.

(b) Connect the Techstream to the DLC3.

(c) Turn the engine switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / Main Body / Data List.

(f) Read the Data List according to the display on the Techstream.

HINT:

As it may take time for the values in the Data List to change, wait at least 10 seconds before reading the Data List.

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Auto H Beam STS0

Automatic high beam sensor current state

Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err

Condition can be displayed

-
Body Electrical > Main Body > Data List

Tester Display

Auto H Beam STS0

OK:

"Daytime" is displayed on the Techstream.

NG

REPLACE FORWARD RECOGNITION CAMERA

OK

4.

READ VALUE USING TECHSTREAM

*1

Cardboard or Equivalent Object

*a

150 mm or more

*b

3 mm or more

(a) Cover the automatic high beam sensor with an opaque object, such as cardboard.

NOTICE:

  • Make sure that there is no clearance between the cardboard or equivalent object and the area of the windshield glass in front of the automatic high beam sensor.
  • If there is any clearance, light may shine on the automatic high beam sensor and the value of the Data List will not change.

(b) Connect the Techstream to the DLC3.

(c) Turn the engine switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / Main Body / Data List.

(f) Read the Data List according to the display on the Techstream.

HINT:

As it may take time for the values in the Data List to change, wait at least 10 seconds before reading the Data List.

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Auto H Beam STS0

Automatic high beam sensor current state

Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err

Condition can be displayed

-
Body Electrical > Main Body > Data List

Tester Display

Auto H Beam STS0

OK:

"Speed" is displayed on the Techstream.

OK

USE SIMULATION METHOD TO CHECK

NG

REPLACE FORWARD RECOGNITION CAMERA

5.

PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Combination Meter / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Combination Meter > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Multi Display All (White)

Multi-information display (White display)

OFF or ON

-
Body Electrical > Combination Meter > Active Test

Tester Display

Multi Display All (White)

OK:

The multi-information display in the combination meter assembly turns on according to the operation of the Active Test.

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE COMBINATION METER ASSEMBLY

6.

READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Auto High Beam Main Switch

Auto high beam switch signal

OFF or ON

OFF: Auto high beam switch not pressed

ON: Auto high beam switch pressed

-
Body Electrical > Main Body > Data List

Tester Display

Auto High Beam Main Switch

OK:

Normal conditions listed above are displayed.

NG

GO TO STEP 8

OK

7.

READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Auto H Beam STS0

Automatic high beam sensor current state

Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err

Condition can be displayed

-
Body Electrical > Main Body > Data List

Tester Display

Auto H Beam STS0

OK:

"Daytime" or "Speed" is displayed on the Techstream.

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE FORWARD RECOGNITION CAMERA

8.

INSPECT AUTO HIGH BEAM SWITCH

(a) Remove the auto high beam switch.

Click here

(b) Inspect the auto high beam switch.

Click here

NG

REPLACE AUTO HIGH BEAM SWITCH

OK

9.

CHECK HARNESS AND CONNECTOR (AUTO HIGH BEAM SWITCH - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND)

(a) Disconnect the G33 main body ECU (multiplex network body ECU) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

G31-5 (+B) - G33-26 (AHBI)

Always

Below 1 Ω

G31-5 (+B) or G33-26 (AHBI) - Body ground

Always

10 kΩ or higher

G31-2 (E) - Body ground

Always

Below 1 Ω
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Automatic High Beam System (B124B)

DESCRIPTION

The main body ECU (multiplex network body ECU) determines the status of the automatic high beam system based on the automatic high beam system signal from the forward recognition camera.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B124B

Automatic High Beam System

Malfunction in automatic high beam system
  • Front camera system
  • Dynamic radar cruise control system
  • Lane departure alert system
  • Pre-collision system
  • SFI system
  • Electronically controlled brake system
  • CAN communication system
  • Forward recognition camera
  • Main body ECU (multiplex network body ECU)

Main body ECU (multiplex network body ECU)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • The lighting system (for Gasoline Model without Cornering Light) uses the CAN communication system. Inspect the communication functions by following How to Proceed with Troubleshooting. Troubleshoot the automatic high beam system after confirming that the communication systems are functioning properly.

    Click here

  • Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

    Click here

HINT:

If the forward recognition camera stores a DTC for a malfunction of any of the following, this DTC will be stored simultaneously.
  • Speed sensor
  • Yaw rate sensor
  • CAN communication system

PROCEDURE

1.

CHECK FOR DTC (HEALTH CHECK)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: System Select / Health Check.

(e) Check for DTCs.

Result

Proceed to

Only DTC B124B is output

A

DTC B124B and other DTCs are output

B
B

GO TO OTHER DTC CHART
A

2.

CHECK FRONT CAMERA SYSTEM

(a) Check if a dynamic radar cruise control system, lane departure alert system or pre-collision system warning message is displayed on the multi-information display.

Click here

OK:

No dynamic radar cruise control system, lane departure alert system and pre-collision system warning messages are displayed.

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

GO TO FRONT CAMERA SYSTEM

Automatic High Beam Camera (B124C)

DESCRIPTION

The main body ECU (multiplex network body ECU) detects a high beam headlight illumination request signal of the automatic high beam system from the forward recognition camera.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B124C

Automatic High Beam Camera

Malfunction in forward recognition camera

Front camera system

Main body ECU (multiplex network body ECU)

WIRING DIAGRAM

PROCEDURE

1.

CHECK FRONT CAMERA SYSTEM

(a) Check front camera system.

Click here

NEXT

END

Light Sensor Circuit (B1244)

DESCRIPTION

The automatic light control sensor detects ambient light. The sensor creates an electrical signal based on the amount of light detected, and sends the signal to the main body ECU (multiplex network body ECU). The main body ECU (multiplex network body ECU) turns on or off the headlights and taillights according to the signal.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

B1244

Light Sensor Circuit
  • The engine switch is on (IG).
  • Either of the following conditions is met:
    • Malfunction in automatic light control sensor
    • Open or short in automatic light control sensor circuit
  • 5 seconds or more
  • Automatic light control sensor
  • Harness or connector
  • Main body ECU (multiplex network body ECU)

Main body ECU (multiplex network body ECU)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

Click here

PROCEDURE

1.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > Main Body > Clear DTCs
NEXT

2.

CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Wait 10 seconds or more.

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / Main Body / Trouble Codes.

(f) Check for DTCs.

Body Electrical > Main Body > Trouble Codes

OK:

DTC B1244 is not output.

OK

USE SIMULATION METHOD TO CHECK

NG

3.

READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) According to the display on the Techstream, read the Data List and check that the value of Light Sensor Illuminance changes while performing the following:

(1) Cover the automatic light control sensor with an opaque object.

(2) Slowly move the opaque object to uncover and then cover the automatic light control sensor.

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Light Sensor Illuminance

Light control sensor illuminance

0 to 8191 lx or SensorFail

Value is output according to ambient light level

-
Body Electrical > Main Body > Data List

Tester Display

Light Sensor Illuminance

OK:

The value changes according to the amount the automatic light control sensor is covered.

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

4.

CHECK HARNESS AND CONNECTOR (AUTOMATIC LIGHT CONTROL SENSOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the G23 automatic light control sensor connector.

(b) Disconnect the G33 main body ECU (multiplex network body ECU) connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

G23-1 (CLTB) - G33-23 (CLTB)

Always

Below 1 Ω

G23-4 (CLTS) - G33-24 (CLTS)

Always

Below 1 Ω

G23-2 (CLTE) - G33-25 (CLTE)

Always

Below 1 Ω

G23-1 (CLTB) or G33-23 (CLTB) - Body ground

Always

10 kΩ or higher

G23-4 (CLTS) or G33-24 (CLTS) - Body ground

Always

10 kΩ or higher

G23-2 (CLTE) or G33-25 (CLTE) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

5.

INSPECT MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

*a

Component with harness connected

(Main Body ECU (Multiplex Network Body ECU))

(a) Connect the G33 main body ECU (multiplex network body ECU) connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

G33-23 (CLTB) - G33-25 (CLTE)

Engine switch off

Below 1 V

Engine switch on (IG)

11 to 14 V
NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

OK

6.

INSPECT AUTOMATIC LIGHT CONTROL SENSOR

(a) Inspect the automatic light control sensor.

Click here

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE AUTOMATIC LIGHT CONTROL SENSOR

Customize Parameters

CUSTOMIZE PARAMETERS

CUSTOMIZE LIGHTING SYSTEM (EXT) (for Gasoline Model without Cornering Light)

NOTICE:

  • When the customer requests a change in a function, first make sure that the function can be customized.
  • Be sure to make a note of the current settings before customizing.
  • When troubleshooting a function, first make sure that the function is set to the default setting.

HINT:

The following items can be customized.

(a) Customizing with the Techstream

(1) Connect the Techstream to the DLC3.

(2) Turn the engine switch on (IG).

(3) Turn the Techstream on.

(4) Enter the following menus: Customize Setting / Light Control or Warning.

(5) Select the setting by referring to the table below.

Light Control

Tester Display

Description

Default

Setting

ECU

Disp Ex ON Sen

Changes the ambient brightness level required to dim the lights such as the indicator lights of the combination meter, A/C indicator light and clock.*A

NORMAL

000:NORMAL,001:DARK2,010:DARK1,011:LIGHT1,100:LIGHT2

Main Body ECU (Multiplex Network Body ECU)

Disp Ex OFF Sen

Changes the ambient brightness level required to cancel the dimming of the lights such as the indicator lights of the combination meter, A/C indicator light and clock.*B

NORMAL

000:NORMAL,001:DARK2,010:DARK1,011:LIGHT1,100:LIGHT2

Main Body ECU (Multiplex Network Body ECU)

Light Auto OFF Delay

Keeps the headlights on for a certain period of time after turning the engine switch off and closing all of doors with the low beam headlights on.

30 s

00:OFF,01:30 s,10:60 s,11:90 s

Main Body ECU (Multiplex Network Body ECU)

Sensitivity

Adjusts the sensitivity of the automatic light control system.*C

Normal

000:Normal,001:Dark2,010:Dark1,011:Light1,100:Light2

Main Body ECU (Multiplex Network Body ECU)

DRL Function

Turns the DRL function on/off.*

ON

0:OFF,1:ON

Main Body ECU (Multiplex Network Body ECU)

Light up Clearance Lights at Door Unlock Function

Turns on the parking lights and the taillights for 15 seconds when a door unlock operation is performed.

ON

0:OFF,1:ON

Main Body ECU (Multiplex Network Body ECU)

Headlight in Conjunction with Wiper

Turns the low beam headlights on/off according to wiper operation.

ON

0:OFF,1:ON

Main Body ECU (Multiplex Network Body ECU)

Tail Remind Buzzer Function

Sounds a buzzer when the driver door is opened with the light control switch in the tail or head position.

ON

0:OFF,1:ON

Main Body ECU (Multiplex Network Body ECU)
  • *: for vehicles with customize setting "DRL Function"

HINT:

The sensitivity adjustment may be difficult to confirm. Check by driving the vehicle.

  • *A
  • *B
  • *C
Warning

Tester Display

Description

Default

Setting

ECU

Lane Change Flashing Times Adjust

Function to change the lane change flashing times.

3

$00:OFF,$01:3,$02:4,$03:5,$04:6,$05:7

Combination Meter Assembly

(b) Customizing with the multi-display

(1) Turn the engine switch on (IG).

(2) Enter the following menus: MENU / Setup / Vehicle / Vehicle Customization / Lights Settings.

(3) Select the setting by referring to the table below.

Display

Default

Content

Setting

Relevant ECU

Headlights Auto-on Sensitivity

0

Adjusts the sensitivity of the automatic light control system.*A

-2, -1, 0, +1 or +2

Main Body ECU (Multiplex Network Body ECU)

Headlights Auto-off Timer

30 sec.

Keeps the headlights on for a certain period of time after turning the engine switch off and closing all of doors with the low beam headlights on.

Off, 30 sec., 60 sec. or 90 sec.

Main Body ECU (Multiplex Network Body ECU)

Daytime Running Lights*

On

Turns the DRL function on/off.

On or Off

Main Body ECU (Multiplex Network Body ECU)
  • *: for vehicles with customize setting "Daytime Running Lights"

HINT:

The sensitivity adjustment may be difficult to confirm. Check by driving the vehicle.

  • *A

Data List / Active Test

DATA LIST / ACTIVE TEST

DATA LIST

NOTICE:

In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

HINT:

Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus:

(1) for Main Body: Body Electrical / Main Body / Data List.

(2) for Steering Angle Sensor: Chassis / Steering Angle Sensor / Data List.

(3) for Combination Meter: Body Electrical / Combination Meter / Data List.

(4) for Front Recognition Camera: Chassis / Front Recognition Camera / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Auto High Beam Main Switch

Auto high beam switch signal

OFF or ON

OFF: Auto high beam switch not pressed

ON: Auto high beam switch pressed

-

Head Light SW (Head)

Light control switch head position signal

OFF or ON

OFF: Light control switch not in head position

ON: Light control switch in head position

-

Insolation Amount of Solar Sensor RH

Solar sensor RH condition

0 to 51100 or SensorFail

Condition can be displayed

-

Insolation Amount of Solar Sensor LH

Solar sensor LH condition

0 to 51100 or SensorFail

Condition can be displayed

-

Light Sensor Illuminance

Light control sensor illuminance

0 to 8191 lx or SensorFail

Value is output according to ambient light level

-

Light Sensor Connection Status

Light control sensor connection status

OFF or ON

OFF: Automatic light control sensor has not been connected

ON: Automatic light control sensor connected or has been connected

-

Headlight Lighting Function

ECU which controls the lighting system

Main Body or Lighting Sys ECU

Main Body: Lighting system controlled by main body ECU (multiplex network body ECU)

Lighting Sys ECU: Lighting system is controlled by headlight ECU sub-assembly

-

Sensitivity

Sensitivity of the automatic light control system

Light2, Light1, Normal, Dark1 or Dark2

Customize setting displayed

-

DRL Function

Setting of the DRL function on/off

OFF or ON

Customize setting displayed

for vehicles with customize setting "DRL Function"

Headlight in Conjunction with Wiper

Wiper-linked low beam headlight control

OFF or ON

Customize setting displayed

-

Disp Ex ON Sen

Ambient brightness level required to dim display lights (combination meter, navigation display, etc.)

Light2, Light1, Normal, Dark1 or Dark2

Customize setting displayed

-

Disp Ex OFF Sen

Ambient brightness level required to cancel dimming display lights (combination meter, navigation display, etc.)

Light2, Light1, Normal, Dark1 or Dark2

Customize setting displayed

-

Light Auto OFF Delay

Light auto OFF delay

Off, 30 s, 60 s or 90 s

Customize setting displayed

-

Auto H Beam STS0

Automatic high beam sensor current state

Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err

Condition can be displayed*

If the value of this item is not as specified, the automatic high beam sensor system may be malfunctioning.

Auto H Beam STS1

Automatic high beam sensor state past 1

Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err

Condition can be displayed*

Although this item is displayed on the Techstream, it is not applicable to this vehicle.

Auto H Beam STS2

Automatic high beam sensor state past 2

Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err

Condition can be displayed*

Although this item is displayed on the Techstream, it is not applicable to this vehicle.

Auto H Beam STS3

Automatic high beam sensor state past 3

Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err

Condition can be displayed*

Although this item is displayed on the Techstream, it is not applicable to this vehicle.

Auto H Beam STS4

Automatic high beam sensor state past 4

Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err

Condition can be displayed*

Although this item is displayed on the Techstream, it is not applicable to this vehicle.

Auto H Beam STS5

Automatic high beam sensor state past 5

Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err

Condition can be displayed*

Although this item is displayed on the Techstream, it is not applicable to this vehicle.

Auto H Beam STS6

Automatic high beam sensor state past 6

Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err

Condition can be displayed*

Although this item is displayed on the Techstream, it is not applicable to this vehicle.

Auto H Beam STS7

Automatic high beam sensor state past 7

Undetec, CAM NA, No sens, Hlight, Taillgt, Speed, Daytime, Village, Malfunc, Delay, Aim Lmt, SAE Mod, Undefin or LIN Err

Condition can be displayed*

Although this item is displayed on the Techstream, it is not applicable to this vehicle.

Light up Clearance Lights at Door Unlock Function

Setting of the welcome light illumination control customize setting

OFF or ON

Customize setting displayed

-

Tail Remind Buzzer Function

Setting of the tail remind buzzer function on/off

OFF or ON

Customize setting displayed

-

The Number of DTC

Number of trouble codes

0 to 255

Number of stored DTCs displayed

-

HINT:

*: The details of each value of the Range are as follows:

Display Value

Condition

Control Condition

Diagnostic Note

Undetec

Automatic high beam sensor being initialized

Control suspended (low beam headlights illuminated)

-

CAM NA

Automatic high beam sensor temporarily disabled due to high temperature, unclear image (due to dirt, fog, etc.), etc.

Control suspended (low beam headlights illuminated)

-

No sens

No lights detected

High beam headlights illuminated

Only when vehicle speed within operation speed range

Hlight

Headlights of oncoming vehicle, etc. detected

Low beam headlights illuminated

Only when vehicle speed within operation speed range

Taillgt

Taillights preceding vehicle, etc. detected

Low beam headlights illuminated

Only when vehicle speed within operation speed range

Speed

No lights detected and vehicle speed below operation speed

Low beam headlights illuminated

-

Daytime

Bright light detected

Low beam headlights illuminated

-

Village

Streetlights, etc. detected

Low beam headlights illuminated

Only when vehicle speed within operation speed range

Delay

Changing between low beams and high beams

Changing between low beams and high beams

Only when vehicle speed within operation speed range

SAE Mod

Not applicable

-

-

Malfunc

Aim Lmt

Undefin

LIN Err
Chassis > Steering Angle Sensor > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Light OFF Switch

Light control switch DRL OFF position signal

OFF or ON

OFF: Light control switch not in DRL OFF position

ON: Light control switch in DRL OFF position

w/ DRL OFF Switch

Auto Light Switch

Light control switch AUTO position signal

OFF or ON

OFF: Light control switch not in AUTO position

ON: Light control switch in AUTO position

-

Head Light Switch (Tail)

Light control switch tail position signal

OFF or ON

OFF: Light control switch in neither tail nor head position

ON: Light control switch in tail or head position

-

Head Light Switch (Head)

Light control switch head position signal

OFF or ON

OFF: Light control switch not in head position

ON: Light control switch in head position

-

High Beam Main Switch

Dimmer switch high position signal

OFF or ON

OFF: Dimmer switch not in high position

ON: Dimmer switch in high position

-

Passing Light Switch

Dimmer switch high flash position (pass) signal

OFF or ON

OFF: Dimmer switch not in high flash position

ON: Dimmer switch in high flash position

-

Auto High Beam Main Switch

Auto high beam switch signal

OFF or ON

OFF: Auto high beam switch off

ON: Auto high beam switch on

Although the item is displayed on the Techstream, it is not applicable to the vehicle.

Turn Signal Switch (Right)

Turn signal switch (right turn position) signal

OFF or ON

OFF: Turn signal switch not in right turn position

ON: Turn signal switch in right turn position

-

Turn Signal Switch (Left)

Turn signal switch (left turn position) signal

OFF or ON

OFF: Turn signal switch not in left turn position

ON: Turn signal switch in left turn position

-

Cornering Light/Front Side Illuminate Light Switch

Turn signal switch (full turn) signal

OFF or ON

OFF: Turn signal switch not in left or right turn position

ON: Turn signal switch in left or right full turn position

-

Front Fog Light Switch

Front fog light switch signal

OFF or ON

OFF: Front fog light switch off

ON: Front fog light switch on

Although the item is displayed on the Techstream, it is not applicable to the vehicle.

Rear Fog Light/Bad Weather Switch

Rear fog light switch signal

OFF or ON

OFF: Rear fog light switch off

ON: Rear fog light switch on

Although the item is displayed on the Techstream, it is not applicable to the vehicle.

Automatic Light Equipped Info

Automatic light control system specification information

Unknown, With or Without

Unknown: Specification not stored

With: Automatic light control system equipped

Without: Automatic light control system not equipped

-

Bad Weather Mode Equipped Info

Bad weather specification information

Unknown, Without or With

Unknown: Specification not stored

Without: Bad weather specification not equipped

With: Bad weather specification equipped

Although the item is displayed on the Techstream, it is not applicable to the vehicle.

The Number of DTCs

Number of trouble codes

0 to 255

Number of stored DTCs displayed

-
Body Electrical > Combination Meter > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Turn Signal Switch (Left)

Turn signal switch (left) signal

OFF or ON

OFF: Turn signal switch not in left turn position

ON: Turn signal switch in left turn position

Although this item is displayed on the Techstream, it is not applicable to this vehicle.

Turn Signal Switch (Right)

Turn signal switch (right) signal

OFF or ON

OFF: Turn signal switch not in right turn position

ON: Turn signal switch in right turn position

Although this item is displayed on the Techstream, it is not applicable to this vehicle.

Turn Switch Signal (Full Turn)

Turn signal switch (full turn) signal

OFF or ON

OFF: Turn signal switch not in left or right turn position

ON: Turn signal switch in left or right turn position

Although this item is displayed on the Techstream, it is not applicable to this vehicle.

Hazard Flasher Switch

Hazard warning signal switch signal

OFF or ON

OFF: Hazard warning signal switch off

ON: Hazard warning signal switch on

-

Lane Change Flashing Times Adjust

Condition of the lane change flashing times

OFF, 3, 4, 5, 6 or 7

Customize setting displayed

-
Chassis > Front Recognition Camera > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

High Temperature Status1

High temperature malfunction status

OFF or ON

OFF: Forward recognition camera high temperature malfunction does not exist

ON: Forward recognition camera high temperature malfunction exists

-

ACTIVE TEST

HINT:

Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus:

(1) for Main Body: Body Electrical / Main Body / Active Test.

(2) for Combination Meter: Body Electrical / Combination Meter / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Main Body > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Daytime Running Light

Daytime running lights

OFF or ON

-

Taillight Relay

Taillight relay

OFF or ON

-

Headlight Relay

Low beam headlights

OFF or ON

-

Head Light Hi

High beam headlights

OFF or ON

-

Rear Fog Light Relay

Rear fog lights

OFF or ON

Although this item is displayed on the Techstream, it is not applicable to this vehicle.

Automatic High Beam Switch Light

Auto high beam switch indicator light

OFF or ON

-
Body Electrical > Combination Meter > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Multi Display All (White)

Multi-information display (White display)

OFF or ON

-

Daytime Running Light Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the daytime running lights.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

    Click here

PROCEDURE

1.

CHECK OPERATION (LOW BEAM HEADLIGHTS)

(a) Check the operation of the low beam headlights.

OK:

The low beam headlights operate normally.

NG

GO TO PROBLEM SYMPTOMS TABLE

OK

2.

PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Main Body > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Daytime Running Light

Daytime running lights

OFF or ON

-
Body Electrical > Main Body > Active Test

Tester Display

Daytime Running Light

OK:

Daytime running lights illuminate.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

3.

INSPECT DRL RELAY

(a) Inspect the DRL relay.

Click here

NG

REPLACE DRL RELAY
OK

4.

CHECK HARNESS AND CONNECTOR (POWER SOURCE - DRL RELAY)

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

1 (DRL relay) - Body ground

Always

11 to 14 V

3 (DRL relay) - Body ground

Always

11 to 14 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

5.

CHECK HARNESS AND CONNECTOR (DRL RELAY - HEADLIGHT ASSEMBLY)

(a) Disconnect the A45 headlight assembly LH connector.

(b) Disconnect the A44 headlight assembly RH connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

5 (DRL relay) - A45-1 (B)

Always

Below 1 Ω

5 (DRL relay) - A44-1 (B)

Always

Below 1 Ω

5 (DRL relay) or A45-1 (B) - Body ground

Always

10 kΩ or higher

5 (DRL relay) or A44-1 (B) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

6.

CHECK HARNESS AND CONNECTOR (DRL RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

(a) Disconnect the 4F instrument panel junction block assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

2 (DRL relay) - 4F-28

Always

Below 1 Ω

2 (DRL relay) or 4F-28 - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

7.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

*a

Component without harness connected

(Instrument Panel Junction Block Assembly)

-

-

(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

Click here

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

4F-28 - MB-25 (DRL)

Always

Below 1 Ω
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART

Lighting System (for Gasoline Model without Cornering Light)

DTC No.

Detection Item

DTC Output from

Link

B1244

Light Sensor Circuit

Main body ECU (multiplex network body ECU)

B124B

Automatic High Beam System

Main body ECU (multiplex network body ECU)

B124C

Automatic High Beam Camera

Main body ECU (multiplex network body ECU)

U0100

Lost Communication With ECM/PCM "A"

Main body ECU (multiplex network body ECU)

U0101

Lost Communication with TCM

Main body ECU (multiplex network body ECU)

U0120

Lost Communication With Starter / Generator Control Module

Main body ECU (multiplex network body ECU)

U0126

Lost Communication with Steering Angle Sensor Module

Main body ECU (multiplex network body ECU)

U0129

Lost Communication with Brake System Control Module

Main body ECU (multiplex network body ECU)

U0151

Lost Communication with Restraints Control Module

Main body ECU (multiplex network body ECU)

U0155

Lost Communication with Instrument Panel Cluster (IPC) Control Module

Main body ECU (multiplex network body ECU)

U0163

Lost Communication with Navigation Control Module

Main body ECU (multiplex network body ECU)

U0164

Lost Communication with HVAC Control Module

Main body ECU (multiplex network body ECU)

U023A

Lost Communication With Image Processing Module "A"

Main body ECU (multiplex network body ECU)

U0327

Software Incompatibility with Vehicle Security Control Module

Main body ECU (multiplex network body ECU)

U1106

Lost Communication with Electric Parking Brake Module

Main body ECU (multiplex network body ECU)

U1117

Lost Communication with Accessory Gateway

Main body ECU (multiplex network body ECU)

Dtc Check / Clear

DTC CHECK / CLEAR

CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Trouble Codes.

Body Electrical > Main Body > Trouble Codes

(e) Check for DTCs.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Trouble Codes.

Body Electrical > Main Body > Clear DTCs

(e) Clear the DTCs.

Hazard Warning Switch Circuit

DESCRIPTION

The combination meter assembly receives the hazard warning signal switch (radio and display receiver assembly) on signal and controls the operation of the hazard warning lights.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

PROCEDURE

1.

READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Combination Meter / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Combination Meter > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Hazard Flasher Switch

Hazard warning signal switch signal

OFF or ON

OFF: Hazard warning signal switch off

ON: Hazard warning signal switch on

-
Body Electrical > Combination Meter > Data List

Tester Display

Hazard Flasher Switch

OK:

Normal conditions listed above are displayed.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

INSPECT HAZARD WARNING SIGNAL SWITCH (RADIO AND DISPLAY RECEIVER ASSEMBLY)

(a) Remove the hazard warning signal switch (radio and display receiver assembly).

Click here

(b) Inspect the hazard warning signal switch (radio and display receiver assembly).

Click here

NG

REPLACE HAZARD WARNING SIGNAL SWITCH (RADIO AND DISPLAY RECEIVER ASSEMBLY)

OK

3.

CHECK HARNESS AND CONNECTOR (HAZARD WARNING SIGNAL SWITCH (RADIO AND DISPLAY RECEIVER ASSEMBLY) - COMBINATION METER ASSEMBLY AND BODY GROUND)

(a) Disconnect the G15 combination meter assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

G20-7 (TB) - G15-3 (HAZ)

Always

Below 1 Ω

G20-7 (TB) or G15-3 (HAZ) - Body ground

Always

10 kΩ or higher

G20-6 (GND) - Body ground

Always

Below 1 Ω
OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Headlight Dimmer Switch Circuit

DESCRIPTION

The steering sensor receives the following switch information:

  • Light control switch in DRL OFF*, tail, head or AUTO position
  • Dimmer switch in high, low or high flash (pass) position
    • *: w/ DRL OFF Switch

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

Click here

PROCEDURE

1.

READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Chassis / Steering Angle Sensor / Data List.

(e) Read the Data List according to the display on the Techstream.

Chassis > Steering Angle Sensor > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Light OFF Switch

Light control switch DRL OFF position signal

OFF or ON

OFF: Light control switch not in DRL OFF position

ON: Light control switch in DRL OFF position

w/ DRL OFF Switch

Auto Light Switch

Light control switch AUTO position signal

OFF or ON

OFF: Light control switch not in AUTO position

ON: Light control switch in AUTO position

-

Head Light Switch (Tail)

Light control switch tail position signal

OFF or ON

OFF: Light control switch in neither tail nor head position

ON: Light control switch in tail or head position

-

Head Light Switch (Head)

Light control switch head position signal

OFF or ON

OFF: Light control switch not in head position

ON: Light control switch in head position

-

High Beam Main Switch

Dimmer switch high position signal

OFF or ON

OFF: Dimmer switch not in high position

ON: Dimmer switch in high position

-

Passing Light Switch

Dimmer switch high flash position (pass) signal

OFF or ON

OFF: Dimmer switch not in high flash position

ON: Dimmer switch in high flash position

-
Chassis > Steering Angle Sensor > Data List

Tester Display

Light OFF Switch

Auto Light Switch

Head Light Switch (Tail)

Head Light Switch (Head)

High Beam Main Switch

Passing Light Switch

OK:

Normal conditions listed above are displayed.

NG

GO TO STEP 5

OK

2.

READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Head Light SW (Head)

Light control switch head position signal

OFF or ON

OFF: Light control switch not in head position

ON: Light control switch in head position

-
Body Electrical > Main Body > Data List

Tester Display

Head Light SW (Head)

OK:

Normal conditions listed above are displayed.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

3.

INSPECT STEERING SENSOR

*a

Component without harness connected

(Steering Sensor)

-

-

(a) Remove the steering sensor.

Click here

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

G48-7 (HEAD) - z4-4 (H)

Always

Below 1 Ω
NG

REPLACE STEERING SENSOR

OK

4.

CHECK HARNESS AND CONNECTOR (STEERING SENSOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the G33 main body ECU (multiplex network body ECU) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

G48-7 (HEAD) - G33-16 (HEAD)

Always

Below 1 Ω

G48-7 (HEAD) or G33-16 (HEAD) - Body ground

Always

10 kΩ or higher
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.

INSPECT TURN SIGNAL SWITCH

(a) Remove the turn signal switch.

Click here

(b) Inspect the turn signal switch.

Click here

NG

REPLACE TURN SIGNAL SWITCH

OK

6.

INSPECT STEERING WHEEL SWITCH HOUSING

(a) Remove the steering wheel switch housing.

Click here

(b) Inspect the steering wheel switch housing.

Click here

OK

REPLACE STEERING SENSOR

NG

REPLACE STEERING WHEEL SWITCH HOUSING

High Beam Headlight Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the high beam headlights.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • Check the operation of the low beam headlights. If the low beam headlights do not operate normally, refer to Problem Symptoms Table.

    Click here

  • Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

    Click here

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Main Body > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Head Light Hi

High beam headlights

OFF or ON

-
Body Electrical > Main Body > Active Test

Tester Display

Head Light Hi

OK:

High beam headlights illuminate.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

INSPECT DIM RELAY

(a) Inspect the DIM relay.

Click here

NG

REPLACE DIM RELAY
OK

3.

CHECK HARNESS AND CONNECTOR (POWER SOURCE - DIM RELAY)

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

1 (DIM relay) - Body ground

Always

11 to 14 V

3 (DIM relay) - Body ground

Always

11 to 14 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

CHECK HARNESS AND CONNECTOR (DIM RELAY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the G33 main body ECU (multiplex network body ECU) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

2 (DIM relay) - G33-13 (DIM)

Always

Below 1 Ω

2 (DIM relay) or G33-13 (DIM) - Body ground

Always

10 kΩ or higher
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

  • Use the following procedure to troubleshoot the lighting system (for Gasoline Model without Cornering Light).
  • *: Use the Techstream.

PROCEDURE

1.

VEHICLE BROUGHT TO WORKSHOP
NEXT

2.

CUSTOMER PROBLEM ANALYSIS

HINT:

  • In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
  • Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
  • The following 5 items are important points for problem analysis:

    What

    Vehicle model, system name

    When

    Date, time, occurrence frequency

    Where

    Road conditions

    Under what conditions?

    Driving conditions, weather conditions

    How did it happen?

    Problem symptoms
NEXT

3.

PRE-CHECK

(a) Measure the battery voltage.

Standard Voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.

(b) Check the fuses and relays.

(c) Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.

NEXT

4.

CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

(a) Using the Techstream, check for CAN communication system DTCs.

Click here

Result

Proceed to

CAN DTCs are not output

A

CAN DTCs are output

B
B

GO TO CAN COMMUNICATION SYSTEM

A

5.

CHECK FOR DTC*

(a) Check for DTCs.

Body Electrical > Main Body > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTCs are output

B
B

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

6.

PROBLEM SYMPTOMS TABLE

(a) Refer to Problem Symptoms Table.

Click here

Result

Proceed to

Fault is not listed in Problem Symptoms Table

A

Fault is listed in Problem Symptoms Table

B
B

GO TO PROBLEM SYMPTOMS TABLE

A

7.

OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Operation Check.

Click here

(b) Terminals of ECU.

Click here

(c) Data List / Active Test.

Click here

(d) On-vehicle Inspection.

(e) Inspection.

NEXT

8.

ADJUST, REPAIR OR REPLACE
NEXT

9.

CONFIRMATION TEST
NEXT

END

LO-beam Headlight does not Illuminate

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the low beam headlights.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

    Click here

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Main Body > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Headlight Relay

Low beam headlights

OFF or ON

-
Body Electrical > Main Body > Active Test

Tester Display

Headlight Relay

OK:

Low beam headlights illuminate.

Result

Proceed to

OK

A

NG (for LH Side)

B

NG (for RH Side)

C
A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

C

GO TO STEP 9

B

2.

INSPECT HEADLIGHT ASSEMBLY LH (LO TERMINAL VOLTAGE)

*a

Front view of wire harness connector

(to Headlight Assembly LH)

(a) Disconnect the A45 headlight assembly LH connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

A45-4 (LO) - Body ground

Light control switch in head position

11 to 14 V
NG

GO TO STEP 4

OK

3.

CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY LH - BODY GROUND)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A45-7 (E) - Body ground

Always

Below 1 Ω
OK

REPLACE HEADLIGHT ASSEMBLY LH

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.

CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - HEADLIGHT ASSEMBLY LH)

(a) Remove the H-LP LH relay.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

5 (H-LP LH relay) - A45-4 (LO)

Always

Below 1 Ω

5 (H-LP LH relay) or A45-4 (LO) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

5.

INSPECT H-LP LH RELAY

(a) Inspect the H-LP LH relay.

Click here

NG

REPLACE H-LP LH RELAY
OK

6.

CHECK HARNESS AND CONNECTOR (POWER SOURCE - H-LP LH RELAY)

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

1 (H-LP LH relay) - Body ground

Always

11 to 14 V

3 (H-LP LH relay) - Body ground

Always

11 to 14 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

7.

CHECK HARNESS AND CONNECTOR (H-LP LH RELAY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

(a) Disconnect the 4F instrument panel junction block assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

2 (H-LP LH relay) - 4F-31

Always

Below 1 Ω

2 (H-LP LH relay) or 4F-31 - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

8.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

*a

Component without harness connected

(Instrument Panel Junction Block Assembly)

-

-

(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

Click here

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

4F-31 - MB-15 (HRLY)

Always

Below 1 Ω
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

9.

INSPECT HEADLIGHT ASSEMBLY RH (LO TERMINAL VOLTAGE)

*a

Front view of wire harness connector

(to Headlight Assembly RH)

(a) Disconnect the A44 headlight assembly RH connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

A44-4 (LO) - Body ground

Light control switch in head position

11 to 14 V
NG

GO TO STEP 11

OK

10.

CHECK HARNESS AND CONNECTOR (HEADLIGHT ASSEMBLY RH - BODY GROUND)

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A44-7 (E) - Body ground

Always

Below 1 Ω
OK

REPLACE HEADLIGHT ASSEMBLY RH

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

11.

CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - HEADLIGHT ASSEMBLY RH)

(a) Remove the H-LP RH relay.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

5 (H-LP RH relay) - A44-4 (LO)

Always

Below 1 Ω

5 (H-LP RH relay) or A44-4 (LO) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

12.

INSPECT H-LP RH RELAY

(a) Inspect the H-LP RH relay.

Click here

NG

REPLACE H-LP RH RELAY
OK

13.

CHECK HARNESS AND CONNECTOR (POWER SOURCE - H-LP RH RELAY)

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

1 (H-LP RH relay) - Body ground

Always

11 to 14 V

3 (H-LP RH relay) - Body ground

Always

11 to 14 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

14.

CHECK HARNESS AND CONNECTOR (H-LP RH RELAY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the G33 main body ECU (multiplex network body ECU) connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

2 (H-LP RH relay) - G33-12 (HRY2)

Always

Below 1 Ω

2 (H-LP RH relay) or G33-12 (HRY2) - Body ground

Always

10 kΩ or higher
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Operation Check

OPERATION CHECK

AUTOMATIC LIGHT CONTROL SYSTEM OPERATION CHECK

NOTICE:

Make sure that the customize settings are set to default when performing the automatic light control system operation check.

Click here

(a) Turn the engine switch on (IG).

(b) Turn the light control switch to the AUTO position.

(c) Cover the automatic light control sensor.

(d) Check that the taillights and low beam headlights come on.

(e) Uncover the automatic light control sensor.

(f) Check that the low beam headlights and taillights turn off.

LIGHT AUTO TURN-OFF SYSTEM OPERATION CHECK

NOTICE:

Make sure that the customize settings are set to default when performing the light auto turn-off system operation check.

Click here

(a) When the taillights are on (low beam headlights are not on)

(1) Close all of the doors.

(2) Turn the engine switch on (IG).

(3) Turn the taillights on.

(4) Turn the engine switch off.

(5) Open the driver door.

(6) Check that all of the lights turn off immediately.

(b) When the low beam headlights are on

(1) Close all of the doors.

(2) Turn the engine switch on (IG).

(3) Turn the low beam headlights on.

(4) Turn the engine switch off.

(5) Open any of the doors.

(6) Close the door.

(7) Check that all of the lights turn off after 30 seconds (delay function).

HINT:

Before the lights turn off, if the lock button on the key is pushed after all of the doors are locked, all of the lights will turn off immediately.

DAYTIME RUNNING LIGHT SYSTEM OPERATION CHECK

NOTICE:

Make sure that the customize settings are set to default when performing the daytime running light system operation check.

Click here

(a) Start the engine.

(b) Turn the light control switch to the tail or AUTO position (with the low beam headlights not turned on via the automatic light control system).

(c) Release the parking brake.

(d) Check that the daytime running lights come on.

NOTICE:

Make sure that the customize settings are set to default when performing the wiper-linked low beam headlight control system operation check.

Click here

WIPER-LINKED LOW BEAM HEADLIGHT CONTROL SYSTEM OPERATION CHECK

(a) Turn the engine switch on (IG).

(b) Shine a light on the automatic light control sensor.*

HINT:

*: If troubleshooting is being performed in a bright area, such as outside on a sunny day, it will not be necessary to perform this step.

(c) Turn the light control switch to the AUTO position.

(d) Operate the front wipers for 10 seconds or more (except MIST or washer-linked wiper operation) and check that the low beam headlights*1 or high beam headlights*2 illuminate.

  • *1: Dimmer switch high position
  • *2: Dimmer switch not high position

WELCOME LIGHT ILLUMINATION CONTROL OPERATION CHECK

NOTICE:

  • When operation of the alarm memory function is requested, welcome light illumination control will not operate.
  • Make sure that the customize settings are set to their default when performing the welcome light illumination control operation check.

    Click here

(a) Turn the engine switch off.

(b) Turn the light control switch to the AUTO position.

(c) Cover the automatic light control sensor.

(d) Close and lock all of the doors.

(e) Unlock all of the doors using the wireless door unlock or entry door unlock function.

(f) Check that the taillights, parking lights, front side marker lights and license plate lights illuminate for 15 seconds.

*a

Automatic High Beam Indicator Light on Combination Meter Assembly

*b

Auto High Beam Switch Indicator

AUTOMATIC HIGH BEAM SYSTEM OPERATION CHECK

(a) Check the operation of the automatic high beam indicator light.

(1) Turn the engine switch on (IG).

(2) Turn the light control switch to the AUTO or head position.

(3) Move the dimmer switch to the high position.

(4) Press the auto high beam switch (indicator illuminates).

HINT:

If the auto high beam switch is turned on when the light control switch is not in the AUTO or head position, or the dimmer switch is not in the high position, "Auto High Beam Ready Turn ON High Beam to Activate" will be displayed on the multi-information display.

(5) Check that the automatic high beam indicator illuminates.

NOTICE:

When the forward recognition camera cannot correctly detect objects due to inclement weather such as thick fog or other visual obstructions, the automatic high beam indicator may not turn on and consequently the automatic high beam system may not operate.

(b) Check the operation of the automatic high beam function.

(1) At night, when driving the vehicle with the automatic high beam system in standby mode, check that the high beams automatically turn on after a short delay when all of the following conditions are met:

  • The vehicle speed is more than approximately 34 km/h (21 mph).
  • The area in front of the vehicle is dark.
  • There are no oncoming vehicles with headlights on.
  • There are no preceding vehicles with taillights on.
  • There are few streetlights along the street ahead.

(2) At night, when driving the vehicle with the high beams turned on by the automatic high beam system, check that the automatic high beam system turns off the high beams and returns to standby mode when any of the following conditions are met:

  • The vehicle speed is less than approximately 27 km/h (17 mph).
  • The level of ambient light is higher than a specified threshold.
  • There are oncoming vehicles with headlights on.
  • There are preceding vehicles with taillights on.
  • Light from streetlights ahead is higher than a specified threshold.

Parts Location

PARTS LOCATION

ILLUSTRATION

*1

HEADLIGHT ASSEMBLY LH

*2

HEADLIGHT ASSEMBLY RH

*3

SIDE TURN SIGNAL LIGHT ASSEMBLY LH

*4

SIDE TURN SIGNAL LIGHT ASSEMBLY RH

*5

FORWARD RECOGNITION CAMERA

*6

SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

*7

ECM

*8

PARK/NEUTRAL POSITION SWITCH ASSEMBLY

*9

NO. 1 ENGINE ROOM RELAY BLOCK AND NO. 1 JUNCTION BLOCK ASSEMBLY

- H-LP LH RELAY

- H-LP RH RELAY

- DIM RELAY

- DRL RELAY

- H-LP LH FUSE

- H-LP RH FUSE

- DRL FUSE

- ALT FUSE

-

-

ILLUSTRATION

*1

CENTER STOP LIGHT SET

*2

LICENSE PLATE LIGHT ASSEMBLY RH

*3

LICENSE PLATE LIGHT ASSEMBLY LH

*4

REAR COMBINATION LIGHT ASSEMBLY RH

*5

REAR COMBINATION LIGHT ASSEMBLY LH

*6

REAR LIGHT ASSEMBLY RH

*7

REAR LIGHT ASSEMBLY LH

*8

REAR COMBINATION LIGHT SOCKET AND WIRE

*9

REAR LIGHT CORD

-

-

ILLUSTRATION

*1

AUTO HIGH BEAM SWITCH

*2

AUTOMATIC LIGHT CONTROL SENSOR

*3

HAZARD WARNING SIGNAL SWITCH (RADIO AND DISPLAY RECEIVER ASSEMBLY)

*4

TURN SIGNAL SWITCH

*5

STOP LIGHT SWITCH ASSEMBLY

*6

STEERING WHEEL SWITCH HOUSING

*7

STEERING SENSOR

*8

AIRBAG ECU ASSEMBLY

*9

MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

*10

DLC3

*11

COMBINATION METER ASSEMBLY

*12

INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

- TAIL RELAY

- BKUP LP RELAY

- TAIL FUSE

- BKUP LP FUSE

- ECU-IG1 NO. 3 FUSE

- ECU-B NO. 2 FUSE

- ECU-DCC NO. 2 FUSE

- HAZ FUSE

- METER-IG2 FUSE

- STOP FUSE

- ECU-ACC FUSE

Precaution

PRECAUTION

PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL

NOTICE:

When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected.

System Name

See Procedure

Lane Departure Alert System (w/ Steering Control)

Intelligent Clearance Sonar System

Parking Assist Monitor System

Panoramic View Monitor System

Pre-collision System

Lighting System (for Gasoline Model with Cornering Light)

PRECAUTION FOR AUTOMATIC HIGH BEAM SYSTEM

(a) General Description

The automatic high beam system is a system that helps ensure visibility by automatically turning the high beam headlights on and off. Additionally, due to control limitations of the automatic high beam system, it may be necessary to manually turn the high beam headlights on and off. For safety reasons, make sure to turn the high beam headlights on and off manually according to the driving conditions.

(b) Conditions Unsuitable for Using Automatic High Beam System

Under the following conditions, the automatic high beam system might not detect other vehicles or lights correctly, or the high beam headlights might cause glare or flash pedestrians or the occupants of other vehicles. Manual operation should be considered.

Factor

Condition

Weather/Climate

When driving in bad weather (rain, snow, fog, sandstorms, etc.).

Front windshield
  • When the windshield glass is not clear (ice, snow or frost on the glass).
  • When the windshield glass is dirty (sand, mud, water stains or bugs on the glass).
  • When the windshield glass is cracked.
  • When the windshield glass is fogged-up.
  • When the windshield glass has a film attached.
  • When an object on the instrument panel reflects off of the windshield glass.
  • When any other abnormal conditions exist with the windshield glass.

Forward recognition camera
  • When the forward recognition camera is deformed.
  • When the forward recognition camera is dirty.
  • When any other abnormal conditions exist with the forward recognition camera.

Nearby vehicles or lights
  • When lights similar to headlights or taillights are in the vicinity of the vehicle.
  • When a nearby vehicle has no lights or its lights are off.
  • When a vehicle in front has misaligned lights, or its lights are changing color.
  • When a vehicle in front has extremely dirty headlights or taillights.

Road conditions
  • When driving in areas where the conditions often change between bright and dark.
  • When driving on hilly roads.
  • When driving on winding roads or around sharp curves.
  • When driving on bumpy roads (cobblestone paving, gravel roads, rough unpaved roads, etc.).
  • When highly reflective objects are in front of the vehicle (mirrors, road signs, etc.).

Own vehicle
  • When the headlights are damaged, deformed or dirty.
  • When the vehicle posture is abnormal (posture has changed due to the vehicle being fully loaded, a trailer being towed, road conditions, etc.).
  • When the vehicle has other malfunctions or has been modified.

Automatic high beam system

Malfunction:

When the automatic high beam indicator light on the combination meter assembly is off and "Headlight System Malfunction Visit Your Dealer" is displayed on the multi-information display.

Others:

  • When the automatic high beam system does not seem to be turning the high beam headlights on and off properly.
  • When the automatic high beam system is frequently turning the high beam headlights on and off.
  • When the glare from the high beam headlights would disturb pedestrians or the drivers of other vehicles.

PRECAUTION FOR FRONT CAMERA SYSTEM

Click here

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

NOTICE:

  • Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

    Click here

  • When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

HINT:

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

Headlight

Symptom

Suspected Area

Link

Left low beam headlight does not illuminate

Refer to "LO-beam Headlight does not Illuminate"

Right low beam headlight does not illuminate

Refer to "LO-beam Headlight does not Illuminate"

Both left and right low beam headlights do not illuminate

Headlight dimmer switch circuit

Main body ECU (Multiplex network body ECU)

Left high beam headlight does not illuminate

Headlight assembly LH

Harness or connector

-

Right high beam headlight does not illuminate

Headlight assembly RH

Harness or connector

-

Both left and right high beam headlights do not illuminate

Headlight dimmer switch circuit

High beam headlight circuit

Main body ECU (Multiplex network body ECU)

High Flash (passing function) does not operate (high beam headlights are normal)

Headlight dimmer switch circuit

Main body ECU (Multiplex network body ECU)

Parking Light

Symptom

Suspected Area

Link

Left parking light does not illuminate

Headlight assembly LH

Harness or connector

-

Right parking light does not illuminate

Headlight assembly RH

Harness or connector

-

Both left and right parking lights do not illuminate

Taillight relay circuit

Harness or connector

-
Front Side Marker Light

Symptom

Suspected Area

Link

Left front side marker light does not illuminate

Headlight assembly LH

Harness or connector

-

Right front side marker light does not illuminate

Headlight assembly RH

Harness or connector

-

Both left and right front side marker lights do not illuminate

Taillight relay circuit

Harness or connector

-
Daytime Running Light

Symptom

Suspected Area

Link

Left daytime running light does not illuminate

Headlight assembly LH

Harness or connector

-

Right daytime running light does not illuminate

Headlight assembly RH

Harness or connector

-

Both left and right daytime running lights do not illuminate

Check customize settings

Daytime running light circuit

Headlight dimmer switch circuit

IG signal circuit

CAN communication system

Main body ECU (Multiplex network body ECU)

Taillight

Symptom

Suspected Area

Link

Left or right taillight (rear combination light assembly) does not illuminate

Rear combination light assembly

Rear combination light socket and wire

Harness or connector

-

Left or right taillight (rear light assembly) does not illuminate

Rear light assembly

Rear light cord

Harness or connector

-

All of the taillights, parking lights, front side marker light, license plate lights and rear side marker lights do not illuminate

Headlight dimmer switch circuit

Taillight relay circuit

Main body ECU (Multiplex network body ECU)

Rear Side Marker Light

Symptom

Suspected Area

Link

Left or right rear side marker light does not illuminate

Rear combination light assembly

Rear combination light socket and wire

License Plate Light

Symptom

Suspected Area

Link

License plate light does not illuminate

License plate light assembly

Harness or connector

-
Stop Light

Symptom

Suspected Area

Link

Left or right stop light does not illuminate

Rear combination light assembly

Rear combination light socket and wire

Harness or connector

-

All of the stop lights do not illuminate

STOP fuse

-

Stop light switch assembly

Harness or connector

-
High Mounted Stop Light

Symptom

Suspected Area

Link

High mounted stop light does not illuminate

Center stop light set

Harness or connector

-
Back-up Light

Symptom

Suspected Area

Link

Left or right back-up light does not illuminate

Rear light assembly

Rear light cord

Harness or connector

-

Both left and right back-up lights do not illuminate

BKUP LP fuse

-

ECU-ACC fuse

-

Park/neutral position switch assembly

Instrument panel junction block assembly

Harness or connector

-
Turn Signal Light

Symptom

Suspected Area

Link

Left or right front turn signal light does not operate

Headlight assembly

Harness or connector

-

Left or right rear turn signal light does not operate

Rear combination light assembly

Rear combination light socket and wire

Harness or connector

-

Left or right side turn signal light does not operate

Side turn signal light assembly

Outer rear view mirror assembly

Harness or connector

-

Turn signal lights do not operate in one direction

Turn signal switch circuit

Meter/gauge system

All turn signal lights do not operate

Turn signal switch circuit

Combination meter assembly

All turn signal lights do not flash at the correct speed

Combination meter assembly

Hazard Warning Signal Light

Symptom

Suspected Area

Link

Hazard warning signal lights do not operate

Hazard warning switch circuit

Combination meter assembly

Automatic Light Control System

Symptom

Suspected Area

Link

Automatic light control system does not operate

Headlight dimmer switch circuit

Main body ECU (Multiplex network body ECU)

Light Auto Turn-off System

Symptom

Suspected Area

Link

Light auto turn-off system does not operate

Headlight dimmer switch circuit

IG signal circuit

Front door courtesy switch circuit

Main body ECU (Multiplex network body ECU)

Remote Operation Function (w/ Telematics System)

Symptom

Suspected Area

Link

Lights do not operate using remote operation function (lighting system is normal)

Telematics system

Wiper-linked Low Beam Headlight Control System

Symptom

Suspected Area

Link

Wiper-linked low beam headlight control system does not operate

Check customize settings

Main body ECU (Multiplex network body ECU)

Welcome Light Illumination Control

Symptom

Suspected Area

Link

Welcome light illumination control does not operate

Check customize settings

Main body ECU (Multiplex network body ECU)

Automatic High Beam System

Symptom

Suspected Area

Link

Automatic high beam system does not operate or automatic high beam indicator does not illuminate (low beam headlights and high beam headlights are normal)

Check millimeter wave radar sensor assembly

Check Data List (High Temperature Status1)

Check automatic high beam indicator light

Check Data List (Auto H Beam STS0)

Perform Active Test (Multi Display All (White))

Auto high beam switch

Harness or connector

Combination meter assembly

Forward recognition camera

Main body ECU (Multiplex network body ECU)

Auto high beam switch indicator does not come ON

Refer to "Automatic High Beam Switch Indicator does not Come ON"

System Diagram

SYSTEM DIAGRAM

HEADLIGHT ASSEMBLY CIRCUIT

Taillight Relay Circuit

DESCRIPTION

The main body ECU (multiplex network body ECU) controls the operation of the TAIL relay.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

    Click here

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Main Body / Active Test.

(e) Perform the Active Test according to the display on the Techstream.

Body Electrical > Main Body > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Taillight Relay

Taillight relay

OFF or ON

-
Body Electrical > Main Body > Active Test

Tester Display

Taillight Relay

OK:

Taillights illuminate.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

CHECK HARNESS AND CONNECTOR (POWER SOURCE - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

(a) Disconnect the 4K instrument panel junction block assembly connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

4K-1 - Body ground

Always

11 to 14 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

*a

Component without harness connected

(Instrument Panel Junction Block Assembly)

-

-

(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

Click here

(b) Connect a positive (+) lead from the battery to terminal 4K-1.

(c) Connect a negative (-) lead from the battery to terminal MB-14 (TRLY).

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

4F-32 - Battery negative (-) terminal

Always

11 to 14 V

4H-30 - Battery negative (-) terminal

Always

11 to 14 V
OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

Terminals Of Ecu

TERMINALS OF ECU

CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Disconnect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.

(b) Measure the voltage and resistance according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

4D-3 - Body ground

LA - Body ground

Ground

Always

Below 1 Ω

4F-1 - Body ground

LG - Body ground

Battery power supply

Always

11 to 14 V

4K-1 - Body ground

W - Body ground

Battery power supply

Always

11 to 14 V

(c) Connect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.

(d) Measure the voltage and resistance, and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

4F-19 - Body ground

BE - Body ground

BKUP LP relay drive output

Engine switch off, reverse (R) not selected

Below 1 V

Engine switch on (IG), reverse (R) selected

11 to 14 V

4F-28 - Body ground

GR - Body ground

Daytime running light system drive output

Daytime running light system operating

Below 1 V

Daytime running light system not operating

11 to 14 V

4F-31 - Body ground

V - Body ground

H-LP LH relay drive output

Light control switch in head position

Below 1 V

Taillights off

11 to 14 V

4F-32 - Body ground

LA-B - Body ground

Parking lights and front side marker lights drive output

Taillights on

11 to 14 V

Taillights off

Below 1 V

4H-10 - Body ground

LG - Body ground

Back-up lights drive output

Engine switch off, reverse (R) not selected

Below 1 V

Engine switch on (IG), reverse (R) selected

11 to 14 V

4H-30 - Body ground

LA-B - Body ground

Taillights, rear side marker lights and license plate lights drive output

Taillights on

11 to 14 V

Taillights off

Below 1 V

G32-19 (GND2) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

G32-23 (AHID) - Body ground

BE - Body ground

Auto high beam switch indicator drive output

Engine switch on (IG), auto high beam switch on

Below 1 V

Engine switch on (IG), auto high beam switch off

11 to 14 V

G33-12 (HRY2) - Body ground

BE - Body ground

H-LP RH relay drive output

Light control switch in head position

Below 1 V

Taillights off

11 to 14 V

G33-13 (DIM) - Body ground

G - Body ground

High beam headlight drive output

Light control switch in head position and dimmer switch in high or high flash position

Below 1 V

Dimmer switch not in high or high flash position

11 to 14 V

G33-16 (HEAD) - Body ground

LG - Body ground

Light control switch head position input

Light control switch in head position

Below 1 V

Light control switch not in head position

11 to 14 V

G33-23 (CLTB) - G33-25 (CLTE)

BE - GR

Automatic light control sensor power supply output

Engine switch off

Below 1 V

Engine switch on (IG)

11 to 14 V

G33-24 (CLTS) - Body ground

R - Body ground

Automatic light control sensor signal input

Engine switch off

Below 1 V

Engine switch on (IG)

Pulse generation

(See waveform 1)

G33-26 (AHBI) - Body ground

B - Body ground

Auto high beam switch signal input

Auto high beam switch on

Below 1 V

Auto high beam switch off

11 to 14 V

(1) Waveform 1

Item

Content

Tester Connection

G33-24 (CLTS) - Body ground

Tool setting

2 V/DIV., 10 ms./DIV.

Condition

Engine switch on (IG)

HINT:

The communication waveform changes according to the surrounding brightness.

CHECK COMBINATION METER ASSEMBLY

Click here

CHECK FORWARD RECOGNITION CAMERA

Click here

CHECK STEERING SENSOR

Click here

Turn Signal Switch Circuit

DESCRIPTION

The steering sensor receives the turn signal switch information and controls the turn signal lights.

WIRING DIAGRAM

PROCEDURE

1.

READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Chassis / Steering Angle Sensor / Data List.

(e) Read the Data List according to the display on the Techstream.

Chassis > Steering Angle Sensor > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Turn Signal Switch (Right)

Turn signal switch (right turn position) signal

OFF or ON

OFF: Turn signal switch not in right turn position

ON: Turn signal switch in right turn position

-

Turn Signal Switch (Left)

Turn signal switch (left turn position) signal

OFF or ON

OFF: Turn signal switch not in left turn position

ON: Turn signal switch in left turn position

-

Cornering Light/Front Side Illuminate Light Switch

Turn signal switch (full turn) signal

OFF or ON

OFF: Turn signal switch not in left or right turn position

ON: Turn signal switch in left or right full turn position

-
Chassis > Steering Angle Sensor > Data List

Tester Display

Turn Signal Switch (Right)

Turn Signal Switch (Left)

Cornering Light/Front Side Illuminate Light Switch

OK:

Normal conditions listed above are displayed.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

INSPECT TURN SIGNAL SWITCH

(a) Remove the turn signal switch.

Click here

(b) Inspect the turn signal switch.

Click here

NG

REPLACE TURN SIGNAL SWITCH

OK

3.

INSPECT STEERING WHEEL SWITCH HOUSING

(a) Remove the steering wheel switch housing.

Click here

(b) Inspect the steering wheel switch housing.

Click here

OK

REPLACE STEERING SENSOR

NG

REPLACE STEERING WHEEL SWITCH HOUSING

Lighting System(for Gasoline Model With Cornering Light)

Lighting System(for Hv Model With Cornering Light)

See More:

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Audio And Visual System(for Gasoline Model): AVC-LAN Circuit. Stereo Component Amplifier Malfunction (B15A3). GPS Antenna Connection Malfunction(short) (B15C0,B15C1)
AVC-LAN Circuit DESCRIPTION Each unit of the audio and visual system connected to the AVC-LAN (communication bus) transmits signals via AVC-LAN communication. If a short to +B or short to ground occurs in an AVC-LAN communication line, the audio and visual system will not function normally because c ...

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual

© 2025 Copyright vehicle-exterior.tavalon.net
0.1506