Toyota Avalon (XX50): Headup Display System(for Hv Model)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Interior / Meter / Gauge / Display / Headup Display System(for Hv Model)

Lost Communication with EMV Missing Message (B132187)

DESCRIPTION

The meter mirror sub-assembly receives signals from the radio and display receiver assembly via local bus communication and navigation system information on the headup display.

This DTC is stored when the meter mirror sub-assembly cannot receive the signal.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Memory	Note
B132187	Lost Communication with EMV Missing Message	Diagnosis Condition: The power switch is on (IG) IG power source voltage is 9.5 V or more Malfunction Status: No communication with radio and display receiver assembly Malfunction Time: 30 seconds or more	Harness or connector Radio and display receiver assembly Meter mirror sub-assembly Combination meter assembly	DTC stored	-

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

Note

B132187

Lost Communication with EMV Missing Message

Diagnosis Condition:

The power switch is on (IG)
IG power source voltage is 9.5 V or more

Malfunction Status:

No communication with radio and display receiver assembly

Malfunction Time:

30 seconds or more

Harness or connector
Radio and display receiver assembly
Meter mirror sub-assembly
Combination meter assembly

DTC stored

WIRING DIAGRAM

PROCEDURE

1.	CHECK FOR DTC (NAVIGATION SYSTEM)

(a) Check if navigation system DTCs are output.

Body Electrical > Navigation System > Trouble Codes

Result	Proceed to
DTCs are not output	A
DTCs are output	B

GO TO NAVIGATION SYSTEM

2.	CHECK FOR DTC (METER / GAUGE SYSTEM)

(a) Check if meter / gauge system DTCs are output.

Click here

Body Electrical > Combination Meter > Trouble Codes

Result	Proceed to
DTC B132187 is not output	A
DTC B132187 is output	B

REPLACE METER MIRROR SUB-ASSEMBLY

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

Customize Parameters

CUSTOMIZE PARAMETERS

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.

CUSTOMIZE HEADUP DISPLAY SYSTEM

(a) Customizing with the Techstream

(1) Connect the Techstream to the DLC3.

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

(3) Turn the Techstream on.

(4) Enter the following menus: Customize Setting / Display.

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

Display

Tester Display	Description	Default	Setting	ECU
Projection Adjustment (Tilt)	Headup display image calibration (tilt calibration)	Default	$03:Clockwise (+3),$02:Clockwise (+2),$01:Clockwise (+1),$00:Default,$FF:Anti-Clockwise (-1),$FE:Anti-Clockwise (-2),$FD:Anti-Clockwise (-3)	Meter mirror sub-assembly
Projection Adjustment (Keystone)	Headup display image calibration (keystone calibration)	Default	$03:Narrow Top (+3),$02:Narrow Top (+2),$01:Narrow Top (+1),$00:Default,$FF:Narrow Bottom (-1),$FE:Narrow Bottom (-2),$FD:Narrow Bottom (-3)	Meter mirror sub-assembly
Projection Adjustment (Distortion)	Headup display image calibration (distortion calibration)	Default	$03:Convex (+3),$02:Convex (+2),$01:Convex (+1),$00:Default,$FF:Concave (-1),$FE:Concave (-2),$FD:Concave (-3)	Meter mirror sub-assembly
Audio Information Display Function	Audio system operation status display setting for headup display*	ON	$00:OFF,$01:ON	Meter mirror sub-assembly
Master Caution Display Function	Master warning light display setting for headup display	ON	$00:OFF,$01:ON	Meter mirror sub-assembly
Speed Limit Display Function	Speed limit display setting for headup display	ON	$00:OFF,$01:ON	Meter mirror sub-assembly
Turn by Turn Animation Function	Route guidance to destination display setting for headup display*	ON	$00:OFF,$01:ON	Meter mirror sub-assembly
Traffic Sign Recognition Animation Function	Traffic sign recognition display setting for headup display*	ON	$00:OFF,$01:ON	Meter mirror sub-assembly
Memory Call Link Function	Memory call link setting for headup display image position	ON	$00:OFF,$01:ON	Meter mirror sub-assembly
Seat Switch Link Function	Power seat switch link setting for headup display image position	ON	$00:OFF,$01:ON	Meter mirror sub-assembly
ECO Drive Indicator Zone Display Function	ECO driving indicator zone display setting for headup display*	ON	$00:OFF,$01:ON	Meter mirror sub-assembly
Projection Adjustment (Tilt)	Headup display image calibration (tilt calibration)*	Default	$05:Clockwise (+5),$04:Clockwise (+4),$03:Clockwise (+3),$02:Clockwise (+2),$01:Clockwise (+1),$00:Default,$FF:Anti-Clockwise (-1),$FE:Anti-Clockwise (-2),$FD:Acut	Meter mirror sub-assembly

HINT:

Depending on the specifications of the vehicle, some items may not be displayed.
*: Not applicable to this vehicle

(b) Customizing with the multi-information display

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

(2) Select the settings tab on the multi-information display and set the customize settings.

Display	Detail 1	Detail 2	Description	Setting	ECU
HUD Main	-	-	Headup display system	ON/OFF	Meter mirror sub-assembly
	HUD Brightness/Position	Brightness	Display brightness setting for headup display	-
	HUD Brightness/Position	Position	Display position setting for headup display	-
	HUD Driving Support	Tachometer Settings	Tachometer display setting for headup display	Blank/Hybrid System/Tachometer
		Navigation	Route guidance to destination display setting for headup display	ON/OFF
		Driving Assist	Driving assist display setting for headup display	ON/OFF
		Compass	Compass display setting for headup display	ON/OFF
		Audio	Audio system-linked display setting for headup display	ON/OFF
	Rotation	-	Headup display image calibration (rotation calibration)	-

HINT:

Depending on the specifications of the vehicle, some items may not be displayed.

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 power switch on (IG).

(d) Enter the following menus: Body Electrical / Head Up Display / Data List.

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

Body Electrical > Head Up Display > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Total Distance Traveled	Total driving distance	Min.: 0, Max.: 16777215	Current total driving distance	-
Total Distance Traveled - Unit	Total driving distance unit	km or mile	Current total driving distance unit	-
Main Switch	Headup display switch (Direct line)	OFF or ON	OFF: Switch released ON: Switch pushed	Not applicable to this vehicle
+B Voltage	Auxiliary battery voltage	Min.: 0.0 V, Max.: 25.5 V or Unset	11 to 14 V	-
Illumination Rate from Illuminance Sensor	Light control sensor input value	Min.: 0 lx, Max.: 65535 lx or Unset	Value according to the brightness is output	0 is displayed when there is no light
Vehicle Speed Meter	Vehicle speed input value (Brake ECU)	Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph) or Unset	Almost the same as actual vehicle speed	-
Engine RPM	Engine speed	Min.: 0 rpm, Max.: 12701 rpm or Unset	Almost the same as actual tachometer	-
Vehicle Speed from Meter ECU	Vehicle speed input value (Meter ECU)	Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph) or Unset	Almost the same as actual vehicle speed	-
Brightness Up Switch	Brightness up switch	OFF or ON	OFF: Switch released ON: Switch pushed	This item can be inspected by adjusting a setting in the HUD settings of the settings tab displayed on the multi-information display.
Brightness Down Switch	Brightness down switch	OFF or ON	OFF: Switch released ON: Switch pushed	This item can be inspected by adjusting a setting in the HUD settings of the settings tab displayed on the multi-information display.
Projection Position Up Switch	Projection position up switch	OFF or ON	OFF: Switch released ON: Switch pushed	This item can be inspected by adjusting a setting in the HUD settings of the settings tab displayed on the multi-information display.
Projection Position Down Switch	Projection position down switch	OFF or ON	OFF: Switch released ON: Switch pushed	This item can be inspected by adjusting a setting in the HUD settings of the settings tab displayed on the multi-information display.
Display Change Switch	Headup display switch (CAN communication line)	OFF or ON	OFF: Switch released ON: Switch pushed	-
Display Angle	Headup display angle	Min.: -12.7 deg, Max.: 12.8 deg or Unset	Actual headup display angle	Approximately -12.7 deg: Displays at lowermost position Approximately 12.8 deg: Displays at uppermost position
Ambient Temperature (Celsius)	Outside temperature (Celsius)	Min.: -40.0°C, Max.: 87.1°C or Unset	Almost the same as actual outside temperature	Not applicable to this vehicle
Ambient Temperature (Fahrenheit)	Outside temperature (Fahrenheit)	Min.: -40°F, Max.: 215°F or Unset	Almost the same as actual outside temperature	-
Illumination Rate from Light Control Sensor	Light control sensor input value	Min.: 0 lx, Max.: 65535 lx or Unset	Value according to the brightness is output	-
LDA System	Existence of lane departure alert system	Without or With	Without: w/o Lane Departure Alert System With: w/ Lane Departure Alert System	-
PCS System	Existence of pre-collision system	Without or With	Without: w/o Pre-collision System With: w/ Pre-collision System	-
ICS System	Existence of intelligent clearance sonar system	Without or With	Without: w/o Intelligent Clearance Sonar System With: w/ Intelligent Clearance Sonar System	-
Radar Cruise System	Existence of dynamic radar cruise control system	Without or With	Without: w/o Dynamic Radar Cruise Control System With: w/ Dynamic Radar Cruise Control System	-
Clearance Sonar System	Existence of intuitive parking assist system	Without or With	Without: w/o Intuitive Parking Assist System With: w/ Intuitive Parking Assist System	-
Road Sign Assist System	Existence of road sign assist system	Without or With	Without: w/o Road Sign Assist System With: w/ Road Sign Assist System	-
ITS System	Existence of ITS	Without or With	Without: w/o ITS Connect With: w/ ITS Connect	-
HV System Indicator	Hybrid system indicator value	Min.: -101%, Max.: 511% or Unset	Current hybrid system indicator value	"Unset" is displayed when the vehicle is stopped and the power switch is on (READY).
Navigation System	Existence of navigation system	Without or With	Without: w/o Navigation System With: w/ Navigation System	-
Audio Information Display Function	Setting of audio system operation status display	OFF or ON	OFF: Audio system operation status display not displayed ON: Audio system operation status display displayed	Not applicable to this vehicle
Master Caution Display Function	Setting of master warning light	OFF or ON	OFF: Master warning light not displayed ON: Master warning light displayed	Displays customize setting of Master Warning Light Function
Speed Limit Display Function	Setting of speed limit display	OFF or ON	OFF: Speed limit display not displayed ON: Speed limit display displayed	Displays customize setting of Speed Limit Display Function
Turn by Turn Animation Function	Setting of route guidance to destination display	OFF or ON	OFF: Route guidance to destination display not displayed ON: Route guidance to destination display displayed	Not applicable to this vehicle
Traffic Sign Recognition Animation Function	Setting of traffic sign recognition display	OFF or ON	OFF: Traffic sign recognition display not displayed ON: Traffic sign recognition display displayed	Not applicable to this vehicle
Memory Call Link Function	Setting of headup display memory call link function	OFF or ON	OFF: Memory call link function off ON: Memory call link function on	Displays customize setting of Memory Call Link Function
Seat Switch Link Function	Setting of headup display power seat switch link function	OFF or ON	OFF: Power seat switch link function off ON: Power seat switch link function on	Displays customize setting of Power Seat Switch Link Function
ECO Drive Indicator Zone Display Function	Setting of ECO driving indicator zone	OFF or ON	OFF: Eco driving indicator zone not displayed ON: Eco driving indicator zone displayed	Not applicable to this vehicle
Color Test Screen (Black)	Active Test color test screen condition	OFF or ON	Current Active Test color test screen condition displayed	-
Color Test Screen (White)	Active Test color test screen condition	OFF or ON	Current Active Test color test screen condition displayed	-
Color Test Screen (Red)	Active Test color test screen condition	OFF or ON	Current Active Test color test screen condition displayed	-
Color Test Screen (Green)	Active Test color test screen condition	OFF or ON	Current Active Test color test screen condition displayed	-
Color Test Screen (Blue)	Active Test color test screen condition	OFF or ON	Current Active Test color test screen condition displayed	-
Color Test Screen (Color Bars)	Active Test color test screen condition	OFF or ON	Current Active Test color test screen condition displayed	-
Color Test Screen (Adjustment)	Active Test color test screen condition	OFF or ON	Current Active Test color test screen condition displayed	-
Display Brightness	Active Test display brightness screen	Min.: 0%, Max.: 100%	Current Active Test display brightness screen condition displayed	-
Display Position	Active Test display position screen	Up (+3), Up (+2), Up (+1), Center, Down (-1), Down (-2) or Down (-3)	Current Active Test display position screen condition displayed	-
Pedestrian Alert System	Existence of pedestrian reminder system	Without or With	Without: w/o Pedestrian Reminder System With: w/ Pedestrian Reminder System	-
FCTA System	Existence of front cross traffic alert system	Without or With	Without: w/o Front Cross Traffic Alert System With: w/ Front Cross Traffic Alert System	-
LTC System	Existence of lane tracing control system	Without or With	Without: w/o Lane Tracing Control System With: w/ Lane Tracing Control System	-
LCS System	Existence of lane change assist system	Without or With	Without: w/o Lane Change Assist System With: w/ Lane Change Assist System	-
LVN System	Existence of traffic movement notification system	Without or With	Without: w/o Traffic Movement Notification System With: w/ Traffic Movement Notification System	-
Driver Emergency Stop Assist System	Existence of driver emergency stop assist system	Without or With	Without: w/o Driver Emergency Stop Assist System With: w/ Driver Emergency Stop Assist System	-

HINT:

Depending on the specifications of the vehicle, some items may not be displayed.

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.

ACTIVE TEST

(a) Connect the Techstream to the DLC3.

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

(d) Enter the following menus: Body Electrical / Head Up Display / Active Test.

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

Body Electrical > Head Up Display > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Color Test Screen (Black)	Headup display (Black color)	ON	-
Color Test Screen (White)	Headup display (White color)	ON	-
Color Test Screen (Red)	Headup display (Red color)	ON	-
Color Test Screen (Green)	Headup display (Green color)	ON	-
Color Test Screen (Blue)	Headup display (Blue color)	ON	-
Color Test Screen (Color Bars)	Headup display (Color bars)	ON	-
Color Test Screen (Adjustment)	Headup display (Adjustment screen)	ON	-
Display Brightness	Headup display (Display brightness)	0 to 100%	-
Display Position	Headup display (Display position)	Up (+3), Up (+2), Up (+1), Center, Down (-1), Down (-2) or Down (-3)	-

HINT:

Depending on the specifications of the vehicle, some items may not be displayed.

Diagnosis System

DIAGNOSIS SYSTEM

CHECK DLC3

(a) Check the DLC3.

Click here

Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART

Headup Display System

DTC No.	Detection Item	Memory	Note
B132187	Lost Communication with EMV Missing Message	DTC stored	-
U010087	Lost Communication With ECM/PCM "A" Missing Message	DTC stored	-
U012987	Lost Communication With Brake System Control Module Missing Message	DTC stored	-
U014287	Lost Communication with Body Control Module "B" Missing Message	DTC stored	-
U015587	Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message	DTC stored	-
U016387	Lost Communication with Navigation Control Module Missing Message	DTC stored	-
U016487	Lost Communication with HVAC Control Module Missing Message	DTC stored	-
U023A87	Lost Communication with Image Processing Module "A" Missing Message	DTC stored	-
U029387	Lost Communication With Hybrid Powertrain Control Module Missing Message	DTC stored	-
U110487	Lost Communication with Driving Support ECU Missing Message	DTC stored	-
U111087	Lost Communication with Intuitive Parking Assist Module Missing Message	DTC stored	w/ Intelligent Clearance Sonar System

Dtc Check / Clear

DTC CHECK / CLEAR

CHECK FOR DTC (HEADUP DISPLAY SYSTEM)

(a) Connect the Techstream to the DLC3.

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

(d) Enter the following menus: Body Electrical / Head Up Display / Trouble Codes.

Body Electrical > Head Up Display > Trouble Codes

(e) Check for DTCs.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

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

(d) Enter the following menus: Body Electrical / Head Up Display / Clear DTCs.

Body Electrical > Head Up Display > Clear DTCs

(e) Clear the DTCs.

How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

Use the following procedure to troubleshoot the headup display system.
*: 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

3.	INSPECT AUXILIARY BATTERY VOLTAGE

(a) Measure the auxiliary battery voltage with the power switch off.

Standard Voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the auxiliary 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 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.	CHECK FOR DTC* (HEADUP DISPLAY SYSTEM)

(a) Check for DTCs.

Body Electrical > Head Up Display > Trouble Codes

Result	Proceed to
DTCs are not output	A
DTCs are output	B

GO TO DIAGNOSTIC TROUBLE CODE CHART

6.	PROBLEM SYMPTOM CONFIRMATION

7.	SYMPTOM SIMULATION

8.	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 PROBLEM SYMPTOMS TABLE

9.	OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Terminals of ECU.

Click here

(b) Data List / Active Test.

Click here

10.	CIRCUIT INSPECTION

11.	ADJUST, REPAIR OR REPLACE

12.	CONFIRMATION TEST

END

Parts Location

PARTS LOCATION

ILLUSTRATION

METER MIRROR SUB-ASSEMBLY

COMBINATION METER ASSEMBLY

INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

- ECU-DCC NO. 2 FUSE

- ECU-IG1 NO. 4 FUSE

RADIO AND DISPLAY RECEIVER ASSEMBLY

DLC3

Precaution

PRECAUTION

PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL

NOTICE:

When disconnecting the cable from the negative (-) auxiliary 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 HV Model with Cornering Light)

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

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.

HINT:

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptom 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.

Headup Display System

Symptom	Suspected Area	Link
Headup display is not displayed	Wire harness or connector	-
	Read the Data List (Display Change Switch)
	Meter mirror sub-assembly
	Combination meter assembly
Brightness of the headup display does not change	Check customize parameters (HUD Brightness/Position)
	Perform Active Test (Display Brightness)
	Read the Data List (Brightness Up Switch, Brightness Down Switch)
	Meter mirror sub-assembly
	Combination meter assembly
Headup display is not displayed in the correct position	Headup display position initialization
	Check customize parameters (HUD Brightness/Position)
	Perform Active Test (Display Position)
	Read the Data List (Projection Position Up Switch, Projection Position Down Switch)
	Meter mirror sub-assembly
	Combination meter assembly
Other headup display malfunction (Other systems are normal)	Meter mirror sub-assembly

System Description

SYSTEM DESCRIPTION

HEADUP DISPLAY SYSTEM DESCRIPTION

(a) The headup display system receives signals from each ECU via CAN communication and local bus communication and displays driving assist information, such as current vehicle speed, on the windshield glass assembly. The brightness and position of the headup display can be changed on the settings screen of the multi-information display. Depending on certain conditions, the following items can be displayed on the headup display:

*a	Display Area A	*b	Display Area B
*c	Display Area C	*d	Display Area D
*e	Display Area E	*f	Display Area F

Display Area	Display
A, B, C, D, E, F	Pre-collision system warning message
	Intelligent clearance sonar system warning message*
	Opening
A, C, D, E, F	Intelligent clearance sonar system caution message*
A, D, E, F	Display position adjustment frame
D, E	Dynamic radar cruise control system warning
	Lane departure alert system warning
	Clearance sonar detection*
	Route guidance to destination (Navigation system)
B	Speedometer
B	Speedometer unit
C	Shift position
C	Speed limit (Navigation system)
D	Dynamic radar cruise control system information
	Lane departure alert system information
	Compass (Navigation system)
	Street name (Navigation system)
E	Unsteady driving alert
	Hands off steering wheel alert
	Master warning light
	Icy warning light
	Information
	Dynamic radar cruise control system notification message
	Audio system operation status
	Hands-free system status
F	Outside temperature
	Hybrid system indicator
	Tachometer

*: w/ Intelligent Clearance Sonar System

System Diagram

SYSTEM DIAGRAM

HINT:

Refer to System Diagram of CAN Communication System.

Click here

Terminals Of Ecu

TERMINALS OF ECU

METER MIRROR SUB-ASSEMBLY

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Signal Input/Output	Condition	Specified Condition
H1-1 (IG) - Body ground	L - Body ground	Power switch signal	-	Power switch off → Power switch on (IG)	Below 1 V → 11 to 14 V
H1-2 (B) - Body ground	P - Body ground	Auxiliary battery	-	Power switch off	11 to 14 V
H1-4 (ES) - Body ground	W-B - Body ground	Ground	-	Always	Below 1 Ω
H1-12 (MPX1)	P	CAN communication line	Input/Output	-	-
H1-13 (MPX2)	R	CAN communication line	Input/Output	-	-
H1-14 (TX+)	L	Local bus communication line	Input/Output	-	-
H1-15 (TX-)	GR	Local bus communication line	Input/Output	-	-

Lost Communication With ECM/PCM "A" Missing Message (U010087,U012987,U014287,U015587,U016387,U016487,U023A87,U029387,U110487,U111087)

DESCRIPTION

The meter mirror sub-assembly communicates with each ECU via CAN communication.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Memory	Note
U010087	Lost Communication With ECM/PCM "A" Missing Message	Diagnosis Condition: The power switch is on (IG) IG power source voltage is 9.5 V or more Malfunction Status: No communication with ECM Malfunction Time: 3.6 seconds or more	ECM CAN communication system Meter mirror sub-assembly	DTC stored	-
U012987	Lost Communication With Brake System Control Module Missing Message	Diagnosis Condition: The power switch is on (IG) IG power source voltage is 9.5 V or more Malfunction Status: No communication with skid control ECU (brake booster with master cylinder assembly) Malfunction Time: 3.6 seconds or more	Skid control ECU (Brake booster with master cylinder assembly) CAN communication system Meter mirror sub-assembly	DTC stored	-
U014287	Lost Communication with Body Control Module "B" Missing Message	Diagnosis Condition: The power switch is on (IG) IG power source voltage is 9.5 V or more Malfunction Status: No communication with main body ECU (multiplex network body ECU) Malfunction Time: 5.0 seconds or more	Main body ECU (Multiplex network body ECU) CAN communication system Meter mirror sub-assembly	DTC stored	-
U015587	Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message	Diagnosis Condition: The power switch is on (IG) IG power source voltage is 9.5 V or more Malfunction Status: No communication with combination meter assembly Malfunction Time: 5.0 seconds or more	Combination meter assembly CAN communication system Meter mirror sub-assembly	DTC stored	-
U016387	Lost Communication with Navigation Control Module Missing Message	Diagnosis Condition: The power switch is on (IG) IG power source voltage is 9.5 V or more Malfunction Status: No communication with radio and display receiver assembly Malfunction Time: 5.0 seconds or more	Radio and display receiver assembly CAN communication system Meter mirror sub-assembly	DTC stored	-
U016487	Lost Communication with HVAC Control Module Missing Message	Diagnosis Condition: The power switch is on (IG) IG power source voltage is 9.5 V or more Malfunction Status: No communication with air conditioning amplifier assembly Malfunction Time: 5.0 seconds or more	Air conditioning amplifier assembly CAN communication system Meter mirror sub-assembly	DTC stored	-
U023A87	Lost Communication with Image Processing Module "A" Missing Message	Diagnosis Condition: The power switch is on (IG) IG power source voltage is 9.5 V or more Malfunction Status: No communication with forward recognition camera Malfunction Time: 5.0 seconds or more	Forward recognition camera CAN communication system Meter mirror sub-assembly	DTC stored	-
U029387	Lost Communication With Hybrid Powertrain Control Module Missing Message	Diagnosis Condition: The power switch is on (IG) IG power source voltage is 9.5 V or more Malfunction Status: No communication with hybrid vehicle control ECU assembly Malfunction Time: 3.6 seconds or more	Hybrid vehicle control ECU assembly CAN communication system Meter mirror sub-assembly	DTC stored	-
U110487	Lost Communication with Driving Support ECU Missing Message	Diagnosis Condition: The power switch is on (IG) IG power source voltage is 9.5 V or more Malfunction Status: No communication with driving support ECU assembly Malfunction Time: 5.0 seconds or more	Driving support ECU assembly CAN communication system Meter mirror sub-assembly	DTC stored	-
U111087	Lost Communication with Intuitive Parking Assist Module Missing Message	Diagnosis Condition: The power switch is on (IG) IG power source voltage is 9.5 V or more Malfunction Status: No communication with clearance warning ECU assembly Malfunction Time: 5.0 seconds or more	Clearance warning ECU assembly CAN communication system Meter mirror sub-assembly	DTC stored	w/ Intelligent Clearance Sonar System

PROCEDURE

1.	CHECK FOR DTC (HEADUP DISPLAY SYSTEM)

(a) Check for DTCs are output.

Body Electrical > Head Up Display > Trouble Codes

GO TO CAN COMMUNICATION SYSTEM

Utility

UTILITY

MIRROR POSITION INITIALIZATION

HINT:

Use this procedure to return the display of the headup display to its initial position.

(a) Connect the Techstream to the DLC3.

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

(d) Enter the following menus: Body Electrical / Head Up Display / Utility / Mirror Position Reset.

(e) Perform the procedure displayed on the Techstream.

Body Electrical > Head Up Display > Utility

Tester Display
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Headup Display System(for Gasoline Model)

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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Can Communication System(for Hv Model): Check Bus 2 Line for Short to GND
DESCRIPTION There may be a short circuit between one of the CAN bus lines and GND when there is no resistance between terminal 18 (CA4H) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3, or terminal 17 (CA4L) of the central gateway ECU (network gateway ECU) and termin ...