Toyota Avalon (XX50): Power Mirror Control System(for Gasoline Model Without Memory)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Exterior / Mirror (ext) / Power Mirror Control System(for Gasoline Model Without Memory)

Data List / Active Test

DATA LIST / ACTIVE TEST

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).

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

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

Body Electrical > Air Conditioner > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Defogger Relay (Rear)	Mirror Heater	OFF or ON	-

Diagnosis System

DIAGNOSIS SYSTEM

CHECK DLC3

(a) Check the DLC3.

Click here

INSPECT BATTERY VOLTAGE

(a) Measure the battery voltage.

Standard Voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the battery.

How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

Use the following procedure to troubleshoot the power mirror control system (for Gasoline Model without Memory)
*: Use the Techstream.

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

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

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.

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

GO TO CAN COMMUNICATION SYSTEM

5.	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

GO TO STEP 7

6.	OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Operation Check

Click here

(b) Terminals of ECU

Click here

(d) Inspection

7.	REPAIR OR REPLACE

8.	CONFIRMATION TEST

END

Mirror Heater does not Operate with Rear Defogger Switch

DESCRIPTION

When the mirror heater switch (rear window defogger switch) on the radio and display receiver assembly is pressed, the operation signal is sent to the air conditioning amplifier assembly via CAN communication. When the air conditioning amplifier assembly receives the signal, it turns on the DEF relay to operate the mirror heaters.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

The power mirror control system (for Gasoline Model without Memory) uses the CAN communication system. Inspect the communication functions by following How to Proceed with Troubleshooting. Troubleshoot the power mirror control system (for Gasoline Model without Memory) after confirming that the communication systems are functioning properly.
Inspect the fuses for circuits related to this system before performing the following procedure.
If the battery voltage is low, the mirror heater function may not operate.

PROCEDURE

1.	PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

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

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

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

Body Electrical > Air Conditioner > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Defogger Relay (Rear)	Mirror Heater	OFF or ON	-

Body Electrical > Air Conditioner > Active Test

Tester Display
Defogger Relay (Rear)

Result	Proceed to
Mirror heater operation on both mirrors is not normal	A
Mirror heater operation on RH side mirror is not normal	B
Mirror heater operation on LH side mirror is not normal	C

GO TO STEP 4

GO TO STEP 6

2.	CHECK WINDOW DEFOGGER SYSTEM

(a) Check the window defogger system operation.

Click here

OK:

The window defogger system operates normally.

GO TO WINDOW DEFOGGER SYSTEM

3.	CHECK HARNESS AND CONNECTOR (DEF RELAY - OUTER REAR VIEW MIRROR ASSEMBLY RH/LH - BODY GROUND)

(a) Remove the DEF relay from the No. 1 engine room relay block and No. 1 junction block assembly.

(b) Disconnect the I12 outer rear view mirror assembly RH connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
DEF relay holder terminal 3 - I28-5 (+)	Always	Below 1 Ω
DEF relay holder terminal 3 - I12-5 (+)	Always	Below 1 Ω
DEF relay holder terminal 3 - Body ground	Always	10 kΩ or higher

USE SIMULATION METHOD TO CHECK

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK HARNESS AND CONNECTOR (DEF RELAY - OUTER REAR VIEW MIRROR ASSEMBLY RH - BODY GROUND)

(a) Remove the DEF relay from the No. 1 engine room relay block and No. 1 junction block assembly.

(b) Disconnect the I12 outer rear view mirror assembly RH connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
DEF relay holder terminal 3 - I12-5 (+)	Always	Below 1 Ω
I12-6 (-) - Body ground	Always	Below 1 Ω
I12-5 (+) or DEF relay holder terminal 3 - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	INSPECT OUTER MIRROR RH

(a) Remove the outer mirror RH.

Click here

(b) Inspect the outer mirror RH.

Click here

OK:

Outer mirror RH is normal.

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH

REPLACE OUTER MIRROR RH

6.	CHECK HARNESS AND CONNECTOR (DEF RELAY - OUTER REAR VIEW MIRROR ASSEMBLY LH - BODY GROUND)

(a) Remove the DEF relay from the No. 1 engine room relay block and No. 1 junction block assembly.

(b) Disconnect the I28 outer rear view mirror assembly LH connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
DEF relay holder terminal 3 - I28-5 (+)	Always	Below 1 Ω
I28-6 (-) - Body ground	Always	Below 1 Ω
I28-5 (+) or DEF relay holder terminal 3 - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.	INSPECT OUTER MIRROR LH

(a) Remove the outer mirror LH.

Click here

(b) Inspect the outer mirror LH.

Click here

OK:

Outer mirror LH is normal.

REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH

REPLACE OUTER MIRROR LH

Operation Check

OPERATION CHECK

CHECK ELECTRICAL REMOTE CONTROL MIRROR FUNCTION

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

(b) With L on the mirror select switch selected, check that the outer rear view mirror assembly LH surface moves up, down, left and right normally.

(c) With R on the mirror select switch selected, check that the outer rear view mirror assembly RH surface moves up, down, left and right normally.

CHECK MIRROR HEATER FUNCTION

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

(b) Check that pressing the mirror heater switch (rear window defogger switch) illuminates the indicator and warms the mirror surfaces.

HINT:

There is a timer extension function which can operate the mirror heaters for up to an additional 45 minutes.

Parts Location

PARTS LOCATION

ILLUSTRATION

*1	OUTER MIRROR SWITCH ASSEMBLY	*2	OUTER REAR VIEW MIRROR ASSEMBLY LH
*3	OUTER REAR VIEW MIRROR ASSEMBLY RH	*4	OUTER MIRROR LH
*5	OUTER MIRROR RH	*6	MIRROR SELECT AND SURFACE ADJUST SWITCH
*7	NO. 1 ENGINE ROOM RELAY BLOCK AND NO. 1 JUNCTION BLOCK ASSEMBLY - DEF FUSE - DEF RELAY - MIR HTR FUSE	*8	INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - ECU-ACC FUSE - ECU-IG1 NO. 3 FUSE

ILLUSTRATION

*1	REAR WINDOW DEFOGGER SWITCH (RADIO AND DISPLAY RECEIVER ASSEMBLY)	*2	DLC3
*3	AIR CONDITIONING AMPLIFIER ASSEMBLY	-	-

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)

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

NOTICE:

If the battery voltage is low, the mirror heater function may not operate.

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.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Power Mirror Control System (for Gasoline Model without Memory)

Symptom	Suspected Area	Link
Electrical remote control mirror does not operate	Outer mirror switch assembly
	Outer rear view mirror assembly LH
	Outer rear view mirror assembly RH
	Wire harness or connector	-
Mirror heater does not operate	Proceed to "Mirror Heater does not Operate with Rear Defogger Switch"

System Description

SYSTEM DESCRIPTION

POWER MIRROR CONTROL SYSTEM (for Gasoline Model without Memory) DESCRIPTION

(a) This system has the following functions: electrical remote control mirror function and mirror heater function.

FUNCTION OF MAIN COMPONENT

Component		Function
Outer rear view mirror assembly	Vertical mirror motor	Receives signals from the outer mirror switch assembly and adjusts the mirror surface position vertically.
	Horizontal mirror motor	Receives signals from the outer mirror switch assembly and adjusts the mirror surface position horizontally.
	Mirror heater	When the mirror heater switch (rear window defogger switch) on the radio and display receiver assembly is operated, the air conditioning amplifier assembly detects the switch operation via CAN communication. The air conditioning amplifier assembly operates DEF relay and mirror heaters in accordance with the switch operation.
Outer mirror switch assembly	Mirror select switch	Consists of individual R and L switches. One must be selected to operate the mirror adjust switch.
Outer mirror switch assembly	Mirror adjust switch	After selecting the R or L switch, the right, left, up and down control switches can be operated to change the angle of the mirror surface.

SYSTEM OPERATION

(a) The power mirror control system (for Gasoline Model without Memory) has the following features:

Function

Outline

Electrical remote control mirror function

When the outer mirror switch assembly is operated, this function moves the mirror surface vertically or horizontally to enable the driver to attain an optimal mirror angle. Turning the mirror select switch to the R position operates the right side mirror, and turning the mirror select switch to the L position operates the left side mirror.

Mirror heater function

Turns on the mirror heaters when the rear window defogger is turned on. The rear window defogger and mirror heaters automatically turn off 15 minutes after the rear window defogger and mirror heaters were activated. The rear window defogger and mirror heaters continue to operate up to an additional 45 minutes if the following conditions are met.

The outside temperature is -3°C (27°F) or lower.
Power generated by the generator assembly is stable.

System Diagram

SYSTEM DIAGRAM

ELECTRICAL REMOTE CONTROL MIRROR FUNCTION

MIRROR HEATER FUNCTION

Communication Table

Sender	Receiver	Signal	Communication Method
Radio and Display Receiver Assembly	Air Conditioning Amplifier Assembly	Mirror heater switch (rear window defogger switch) signal	CAN

Terminals Of Ecu

TERMINALS OF ECU

CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

Click here

RADIO AND DISPLAY RECEIVER ASSEMBLY

Click here

Power Mirror Control System(for Gasoline Model With Memory)

Power Mirror Control System(for Hv Model With Memory)

See More:

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Can Communication System(for Hv Model): DCM Communication Stop Mode. Diagnosis System. Diagnostic Trouble Code Chart
DCM Communication Stop Mode DESCRIPTION Detection Item Symptom Trouble Area DCM Communication Stop Mode Any of the following conditions are met: Communication stop for "DCM" is indicated on the "Communication Bus Check" screen of the Techstream. Click here Communication stop history for "DCM" is ind ...