Toyota Avalon (XX50): Telematics System(for Gasoline Model)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Audio, Visual, Telematics / Telematics / Telematics System(for Gasoline Model)

Diagnosis System

DIAGNOSIS SYSTEM

DESCRIPTION

(a) Diagnostic Trouble Codes (DTCs) for the telematics system can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and to repair it.

CHECK DLC3

(a) Check the DLC3.

Click here

Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART

Telematics System

DTC No.	Detection Item	Link
U0142	Lost Communication with Body Control Module "B"
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module
U0163	Lost Communication with Navigation Control Module

Dtc Check / Clear

DTC CHECK / CLEAR

CHECK DTC

(a) Connect the Techstream to the DLC3.

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

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

Body Electrical > Telematics > Trouble Codes

(e) Check for DTCs.

Click here

CLEAR DTC

(a) Connect the Techstream to the DLC3.

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

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

Body Electrical > Telematics > Clear DTCs

(e) Clear the DTCs.

How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

Use the following procedure to troubleshoot the telematics system.
*: Use the Techstream.

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

2.	CUSTOMER PROBLEM ANALYSIS

HINT:

In troubleshooting, check 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 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 BATTERY

(a) Measure the battery voltage.

Standard Voltage:

11 to 14 V

HINT:

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

4.	CHECK CAN COMMUNICATION SYSTEM*

(a) Check if CAN communication system DTCs are output.

Click here

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

GO TO CAN COMMUNICATION SYSTEM

5.	CHECK DTC*

(a) Check for DTCs.

Click here

Body Electrical > Telematics > Trouble Codes

Result	Proceed to
DTCs are not output.	A
Safety connect system DTCs are output.	B
Telematics system DTCs are output.	C

GO TO SAFETY CONNECT SYSTEM

GO TO DIAGNOSTIC TROUBLE CODE CHART

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

HINT:

If the symptom does not recur and no DTCs are output, perform the simulation method.

Click here

GO TO STEP 8

7.	PERFORM TROUBLESHOOTING*

(a) Refer to Terminals of ECU.

Click here

8.	REPAIR OR REPLACE

9.	CONFIRMATION TEST

END

Operation Check

OPERATION CHECK

CHECK DCM OPERATION HISTORY

HINT:

This function is used to display operation factor data and time at which it was stored in the DCM (Telematics Transceiver).

(a) Check DCM Operation History

HINT:

When problem symptoms due to wave interference cannot be reproduced, this function provides DCM operation history information which can be used to explain the cause of the malfunction to the customer and/or contact the service center.

(1) Connect the Techstream to the DLC3.

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

(3) Turn the Techstream on.

(4) Enter the following menus: Body Electrical / Telematics / Utility / DCM Operation History.

Body Electrical > Telematics > Utility

Tester Display
DCM Operation History

Item	Function	Parameter Name
Request Type from Service Center	Displays the type of request received from the service center.	Remote Diagnostics
		Remote Operation
		Remote Vehicle Status
		Remote Immobiliser Set
		Remote Immobiliser Unset
		Remote Guest Driver Status
		Remote Service Flag
Remote Operation Type	Displays the type of remote operation request received from the service center.	Hazard ON (Car Locator)
		Hazard Lamp OFF
		Hazard Lamp OFF Cancel
		Door Lock
		Door Unlock
		Door Lock with Security Set
		Door Unlock with Security Unset
		Power Window Close
		Power Window Close Cancel
		Air Conditioner ON
		Air Conditioner OFF
Notification Preference Status 1	Displays whether a service flag received from the service center is turned on.	Remote Warning
		Remote Detected DTC
		Remote FFD
		Remote Detect DTC
		Remote Vehicle Status
		Remote Precaution
		Remote Monitoring
		Remote DTC Recorder
Notification Preference Status 2	Displays whether a service flag received from the service center is turned on.	Remote Alarm Detect
		Remote Operation
		Remote Immobiliser
		Remote Vehicle Location
		Remote Navigation Display
		Remote Guest Driver Status
Notification Preference Status 3	Displays whether a service flag received from the service center is turned on.	Remote A/C by Smart Key
Notification Preference Status 3		Remote Service Function
Remote Transmission Error	Displays the reason for failure if communication between the service center and DCM (Telematics Transceiver) failed.	Priority Interruption
		CDMA Out of Service
		Communication Failure
		HTTP Time Out
		HTTP Status (Retry)
		HTTP Status (No Retry)
		E-Mail Tag
		E-Mail Data
		Center
Remote Door Lock and Unlock	Displays operation factor data for when a remote door lock and unlock operation was performed.	Success
		Error (Priority Interruption)
		Error (CDMA Out of Service)
		Error (Communication Failure)
		Error (HTTP Time Out)
		Error (HTTP Status (Retried))
		Error (HTTP Status (Not Retried))
		Error (E-Mail Tag)
		Error (E-Mail Data)
		Error (Service Center)
		Error (Combination Rule)
		Error (Invalid Request)
		Error (Delayed Receipt)
		Error (Invalid Time)
		Error (Out of Operation)
		Cancel Failure (No Operation)
		Cancel Failure (Day Elapse)
		Cancel Failure (IG/ACC ON)
		Cancel Failure (Active Manually)
		Cancel Failure (Canceled)
		Cancel Failure (Operation Failure)
		Rejected (IG/ACC ON)
		Rejected (Under Repair)
		Rejected (Setting Not Operated)
		Rejected (Received Inaccurate Data)
		Operated Manually
		Door Open
		Trunk Lid Open
		Hood Open
		Door Lock Operation
		Key in the Vehicle
		Smart Cancel ON
		Unable to Start the Engine
		Intrusion Sensor Error
		Intruder Detected
		Lost Communication (Time Data)
		Commu Error (Unmatched Time)
		Lost Communication (Periodical)
		Communication Error (Periodical)
		Lost Communication (No Response)
		Communication Error (No Response)
		Commu Error (DCM ECU Error)
		All Doors Locked
		One of Doors Unlocked
		Coincidence Operation
		Unable to Lock
		Unable to Unlock
		Lost CAN Communication (Reply)
		CAN Communication Error (Reply)
Remote Power Window*	Displays operation factor data for when a remote power window operation was performed.	Success
		Error (Priority Interruption)
		Error (CDMA Out of Service)
		Error (Communication Failure)
		Error (HTTP Time Out)
		Error (HTTP Status (Retried))
		Error (HTTP Status (Not Retried))
		Error (E-Mail Tag)
		Error (E-Mail Data)
		Error (Service Center)
		Error (Combination Rule)
		Error (Invalid Request)
		Error (Delayed Receipt)
		Error (Invalid Time)
		Error (Out of Operation)
		Cancel Failure (No Operation)
		Cancel Failure (Day Elapse)
		Cancel Failure (IG/ACC ON)
		Cancel Failure (Active Manually)
		Cancel Failure (Canceled)
		Cancel Failure (Operation Failure)
		Rejected (IG/ACC ON)
		Rejected (Under Repair)
		Rejected (Setting Not Operated)
		Rejected (Received Inaccurate Data)
		Operated Manually
		Door Open
		Trunk Lid Open
		Hood Open
		Door Lock Operation
		Key in the Vehicle
		Smart Cancel ON
		Unable to Start the Engine
		Intrusion Sensor Error
		Intruder Detected
		Lost Communication (Time Data)
		Commu Error (Unmatched Time)
		Lost Communication (Periodical)
		Communication Error (Periodical)
		Lost Communication (No Response)
		Communication Error (No Response)
		Commu Error (DCM ECU Error)
		All Windows Closed
		One of Windows Opened
		Coincidence Operation
		Jam Protection (Opened)
		Jam Protection (Closed)
		P/W Error Detected
		Power Supply Insufficiency
		P/W NOT Initialized
		Lost CAN Communication (Reply)
		CAN Communication Error (Reply)
Remote Engine Start and Stop	Displays operation factor data for when a remote engine start and stop operation was performed.	Success
		Error (Priority Interruption)
		Error (CDMA Out of Service)
		Error (Communication Failure)
		Error (HTTP Time Out)
		Error (HTTP Status (Retried))
		Error (HTTP Status (Not Retried))
		Error (E-Mail Tag)
		Error (E-Mail Data)
		Error (Service Center)
		Error (Combination Rule)
		Error (Invalid Request)
		Error (Delayed Receipt)
		Error (Invalid Time)
		Error (Out of Operation)
		Cancel Failure (No Operation)
		Cancel Failure (Day Elapse)
		Cancel Failure (IG/ACC ON)
		Cancel Failure (Active Manually)
		Cancel Failure (Canceled)
		Cancel Failure (Operation Failure)
		Rejected (IG/ACC ON)
		Rejected (Under Repair)
		Rejected (Setting Not Operated)
		Rejected (Received Inaccurate Data)
Remote Engine Start and Stop	Displays operation factor data for when a remote engine start and stop operation was performed.	Operated Manually
		Door Open
		Trunk Lid Open
		Hood Open
		Door Lock Operation
		Key in the Vehicle
		Smart Cancel ON
		Unable to Start the Engine
		Intrusion Sensor Error
		Intruder Detected
		Lost Communication (Time Data)
		Commu Error (Unmatched Time)
		Lost Communication (Periodical)
		Communication Error (Periodical)
		Lost Communication (No Response)
		Communication Error (No Response)
		Commu Error (DCM ECU Error)
		A/C OFF
		A/C Condition Failure
		DCM ECU Low Voltage
		Accumulation Time Excess
		A/C ON
		Remote Starter Connecting
		A/C OFF Success
		Remote Starter Not Start
		A/C OFF by Smart Key
		A/C OFF by Vehicle Operation
		A/C OFF Past The Time Limit
		A/C OFF Low Voltage
		Smart Key Operation Success
		Smart Key Operation Failure
		Engine Start Failure
		IG ON Failure
		A/C ON Failure
		A/C OFF Failure
Guest Driver Monitor	Displays operation factor data for when a guest driver monitor operation was performed.	Violation Notice
		Violation Error (Priority Interruption)
		Violation Error (CDMA Out of Service)
		Violation Error (Communication Failure)
		Violation Error (HTTP Time Out)
		Violation Error (HTTP Status (Retry))
		Violation Error (HTTP Status (No Retry))
		Violation Error (E-Mail Tag)
		Violation Error (E-Mail Data)
		Violation Error (Center)
		Update Notice
		Update Error (Priority Interruption)
		Update Error (CDMA Out of Service)
		Update Error (Communication Failure)
		Update Error (HTTP Time Out)
		Update Error (HTTP Status (Retry))
		Update Error (HTTP Status (No Retry))
		Update Error (E-Mail Tag)
		Update Error (E-Mail Data)
		Update Error (Center)
		Status Notice
		Status Error (Priority Interruption)
		Status Error (CDMA Out of Service)
		Status Error (Communication Failure)
		Status Error (HTTP Time Out)
		Status Error (HTTP Status (Retry))
		Status Error (HTTP Status (No Retry))
		Status Error (E-Mail Tag)
		Status Error (E-Mail Data)
		Status Error (Center)
		Result Notice
		Result Error (Priority Interruption)
		Result Error (CDMA Out of Service)
		Result Error (Communication Failure)
		Result Error (HTTP Time Out)
		Result Error (HTTP Status (Retry))
		Result Error (HTTP Status (No Retry))
		Result Error (E-Mail Tag)
		Result Error (E-Mail Data)
		Result Error (Center)
Vehicle Status Report	Displays operation factor data for when a vehicle status report operation was performed.	Forget Notice
		Forget Notice Failure (Interrupt)
		Forget Notice Failure (Other)
		Vehicle Status
		Vehicle Status Failure (Interrupt)
		Vehicle Status Failure (Other)
		Vehicle Status Connect Scantool
		Vehicle Status Connect Scantool (Inter)
		Vehicle Status Connect Scantool (Other)
		Forget Notice Connect Scantool
		Forget Notice Connect Scantool (Inter)
		Forget Notice Connect Scantool (Other)

*: Not supported

Parts Location

PARTS LOCATION

ILLUSTRATION

*1	TELEPHONE ANTENNA ASSEMBLY - GPS - Telephone Main	*2	CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
*3	NAVIGATION ANTENNA ASSEMBLY - Telephone Sub	*4	AIR CONDITIONING AMPLIFIER ASSEMBLY
*5	DLC3	*6	MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
*7	INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - DCM FUSE - ECU-IG2 NO. 3 FUSE - ECU-ACC FUSE	*8	DCM (TELEMATICS TRANSCEIVER)

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 terminal 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)

SERVICE MODE

NOTICE:

Before servicing, enter service mode to restrain telematics communication functions and prevent the Toyota Entune Remote Connect from being operated while servicing.
Service mode can be entered by using the Techstream or operating the radio and display receiver assembly.

(a) Service mode

HINT:

To cancel service mode, turn the engine switch off and on (IG) to display the service mode screen and cancel service mode.

(1) Service mode (Using the Techstream)

Connect the Techstream to the DLC3.
Turn the engine switch on (IG).
Turn the Techstream on.
Enter the following menus: Body Electrical / Telematics / Trouble Codes.

Body Electrical > Telematics > Trouble Codes

(2) Service mode (When not using the Techstream)

Start diagnostic mode.
w/o Navigation System: Click here

w/ Navigation System: Click here

PRECAUTION FOR TELEMATICS SYSTEM

(a) If replacing any of the following parts, refer to Initialization.

Click here

NOTICE:

If registration is not performed after replacing any of the following parts, the remote door lock and unlock and remote engine start and stop will not be available.

(1) Certification ECU (smart key ECU assembly)

(2) DCM (telematics transceiver)

(3) Main body ECU (multiplex network body ECU)

(b) If an additional device such as a theft deterrent or OBD monitoring device is connected to the DLC3, some functions may not operate correctly.

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

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.

Application Function

Symptom	Suspected Area	Link
Vehicle status cannot be checked using the application	Proceed to "Remote Service Malfunction"
Vehicle status alerts are not received by the application even if remote notification operation conditions are met	Proceed to "Remote Service Malfunction"
Vehicle cannot be operated remotely using the application	Perform remote door lock and unlock registration and check if the problem symptom recurs
Vehicle cannot be operated remotely using the application	Proceed to "Remote Service Malfunction"

Remote Engine Start and Stop Function (Using electrical key transmitter sub-assembly)

Symptom	Suspected Area	Link
Engine does not start by remote engine start function	Proceed to "Remote Engine Starter does not Operate"
Engine does not stop by remote engine stop function	Proceed to "Remote Engine Starter does not Operate"

Remote Engine Starter does not Operate

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Before replacing the DCM (telematics transceiver), refer to Registration.

Click here

PROCEDURE

1.	CHECK SMART KEY SYSTEM (for Start Function)

(a) Check that the engine can be started by pressing the engine switch.

Result	Proceed to
Engine can be started.	A
Engine cannot be started.	B

GO TO SMART KEY SYSTEM (for Start System)

2.	REGISTRATION

HINT:

If registration is not performed after replacing any of the following parts, the remote engine start and stop will not be available.

Certification ECU (smart key ECU assembly)
DCM (telematics transceiver)

(a) Perform remote engine start and stop registration.

Click here

(b) Check if the problem symptom recurs.

Result	Proceed to
System does not return to normal.	A
System returns to normal.	B

END

CHECK DTC

(a) If DTC B2285 is output, perform troubleshooting for DTC B2285 first.

Result	Proceed to
DTC B2285 is not output.	A
DTC B2285 is output.	B

GO TO DTC B2285

4.	CHECK DCM (TELEMATICS TRANSCEIVER)

(a) Disconnect the G9 DCM (telematics transceiver) connector.

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
G9-29 (SLPD) - Body ground	Steering locked	11 to 14 V
G9-29 (SLPD) - Body ground	Steering unlocked	Below 1.5 V

HINT:

The steering locks when any door is opened with the shift lever in P and the engine switch off. The steering unlocks when the engine switch is turned on (ACC).

REPLACE DCM (TELEMATICS TRANSCEIVER)

5.	CHECK HARNESS AND CONNECTOR (DCM (TELEMATICS TRANSCEIVER) - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

(a) Disconnect the G9 DCM (telematics transceiver) connector.

(b) Disconnect the G40 certification ECU (smart key ECU assembly) connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
G9-29 (SLPD) - G40-14 (SLP)	Always	Below 1 Ω
G9-29 (SLPD) or G40-14 (SLP) - Body ground	Always	10 kΩ or higher

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

REPAIR OR REPLACE HARNESS OR CONNECTOR

Remote Service Malfunction

PROCEDURE

1.	CHECK CAN COMMUNICATION SYSTEM

(a) Connect the Techstream to the DLC3.

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

(d) Enter the following menus: Bus Check.

Click here

(e) Check that all ECUs and sensors that use CAN communication are connected.

Result	Proceed to
There are no connection problems.	A
There is a connection problem.	B

GO TO CAN COMMUNICATION SYSTEM

2.	CHECK DTC OUTPUT

(a) Connect the Techstream to the DLC3.

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

(d) Enter the following menus: Health Check.

(e) Check for DTCs.

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

INSPECT EACH ECU SYSTEM

3.	CHECK OPERATION OF EACH SYSTEM

(a) Check that each system related to Toyota Entune Remote Connect operates normally.

(1) Check power door lock control system

Click here

(2) Check smart key system (for Entry Function)

Click here

(3) Check smart key system (for Start Function)

Click here

(4) Check theft deterrent system

Click here

(5) Check lighting system (INT)

Click here

(6) Check meter/gauge system

Click here

(7) Check air conditioning system (for Automatic Air Conditioning System)

Click here

(8) Check power window control system

Click here

(9) Check sliding roof system

Click here

(10) Check lighting system (EXT)

Click here

Result	Proceed to
All of the systems related to Toyota Entune Remote Connect operate normally.	A
Any system related to Toyota Entune Remote Connect does not operate normally.	B

GO TO ABNORMAL SYSTEM

4.	CHECK DCM OPERATION HISTORY

(a) Check DCM Operation History.

Body Electrical > Telematics > Utility

Tester Display
DCM Operation History

CONTACT SERVICE CENTER

System Description

SYSTEM DESCRIPTION

OUTLINE

(a) Toyota Entune Remote Connect, which enables the user to check the vehicle status and operate the vehicle from a remote location, has been adopted.

(b) Toyota Entune Remote Connect is available by installing a dedicated smartphone application after entering a service contract*.

*: Toyota Entune Remote Connect cannot be operated until the user has entered a service contract.

(c) Toyota Entune Remote Connect services are performed through data communication between mainly a Toyota Entune Remote Connect capable DCM (telematics transceiver), the service center and a smartphone with the application installed.

HINT:

Start and operate the Toyota Entune Remote Connect system according to the instructions displayed on the application.
The contents of Toyota Entune Remote Connect may vary depending on the application.
For details on available Toyota Entune Remote Connect, go to http://www.toyota.com/Entune/

FUNCTION OF MAIN COMPONENTS

Component		Function
DCM (Telematics Transceiver)		Sends vehicle information signals to the service center. Receives remote operation signals from the service center and sends them to each ECU.
Telephone Antenna Assembly	GPS Antenna	Receives signals from GPS satellites and transmits these signals to the DCM (telematics transceiver).
Telephone Antenna Assembly	Telephone Antenna (Main)	Transmits signals from the DCM (telematics transceiver) and receives signals from the service center.
Navigation Antenna Assembly	Telephone Antenna (Sub)	Receives signals from the service center.
Certification ECU (Smart key ECU assembly)		Receives the remote engine start and stop signal from the user's smartphone or electrical key transmitter sub-assembly via the DCM (telematics transceiver) and initiates the engine start operation.
Air Conditioning Amplifier Assembly		Sends ambient temperature signals to the DCM (telematics transceiver). Operates the air conditioning system and/or rear defogger after the engine has been started by remote operation, based on signals from the DCM (telematics transceiver).
Main Body ECU (Multiplex Network Body ECU)		Locks the door when a remote door lock and unlock operation signal is received.

FUNCTION

(a) The main services of Toyota Entune Remote Connect are as follows:

Category	Remote Service	Function
Remote Information	Vehicle Status Report	Allows the vehicle status (doors open/closed, etc.) and vehicle information (distance traveled, etc.) to be checked from a remote location via a smartphone, after the engine switch has been turned off. By updating the information, the latest vehicle status can be displayed.*1
Remote Notification	Guest Driver Monitor	Allows the user to set limits on the vehicle speed, traveling time, etc. when a guest driver (a family member, valet, etc.) is driving the vehicle, via a smartphone. If the guest driver exceeds a user set limit, a notification will be sent to the user so the driving status can be monitored.23
Remote Notification	Vehicle Status Alerts	Sends a notification to the user if certain operations are not performed within a certain amount of time after the engine switch is turned off, such as locking the doors, closing the windows, etc.24
Remote Operation	Remote Engine Start and Stop	Allows the user to start the engine and keep it running for a certain amount of time from a remote location via a smartphone or the electrical key transmitter sub-assembly. Performing the remote stop operation after the remote start operation has been performed changes the vehicle to the engine switch off condition.5 Starts the air conditioning system when the engine is remotely started, if the air conditioning system was on when the engine switch was last turned off. The air conditioning system or rear defogger may be operated by signals from the service center depending on the ambient temperature, even if the air conditioning system or defogger had been off when the engine switch was last turned off.6 When the engine is remotely started, the rear defogger may be operated by signals from the DCM (telematics transceiver) depending on the ambient temperature.*6
Remote Operation	Remote Door Lock and Unlock	Allows the doors to be locked/unlocked from a remote location via a smartphone.*7

*1: If the latest vehicle information has not been sent from the vehicle due to the condition of the vehicle (such as if the DCM (telematics transceiver) is outside of the cellular telephone reception area), the most recently received information will be displayed.
*2: No notifications will be sent if the latest vehicle information has not been sent from the vehicle due to the condition of the vehicle (such as if the DCM (telematics transceiver) is outside of the cellular telephone reception area). Notifications may be delayed if the smartphone has poor reception.
*3: Only one notification per set condition will be sent during a single trip.
*4: If the smart key system has been canceled, vehicle status alerts notifications will not be sent to the user. If the electrical key transmitter sub-assembly is inside the vehicle or detected as being "inside cabin", vehicle status alerts notifications will not be sent.
*5: If the vehicle cannot receive the remote engine start and stop signal due to the condition of the vehicle (such as if the DCM (telematics transceiver) is outside of the cellular telephone reception area), the engine will not be started remotely. Additionally, the remote engine start and stop operation signal may not be received depending on vehicle conditions.

*6: The air conditioning system and rear defogger will automatically be operated according to the ambient temperature as shown in the following table:

Ambient Temperature	Air Conditioning System	Rear Defogger
30°C (86°F) or higher	○ (Temperature setting: 25°C (77°F))	-
Below 5°C (41°F)	○ (Temperature setting: 25°C (77°F))	○

*7: If the vehicle cannot receive a door lock/unlock signal due to the condition of the vehicle (such as if the DCM (telematics transceiver) is outside of the cellular telephone reception area), the door lock or unlock operation will not be performed. After a door unlock operation is performed, if the doors are not opened within a certain amount of time, the doors will automatically be locked.

System Diagram

SYSTEM DIAGRAM

Terminals Of Ecu

TERMINALS OF ECU

HINT:

Check from the rear of the connector while it is connected to the components.

DCM (TELEMATICS TRANSCEIVER)

*a	to Telephone Antenna (Sub)	*b	to Telephone Antenna (Main)
*c	to GPS Antenna	-	-

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
G9-1 (+B) - G9-4 (E)	B - W-B	Power source (+B)	Always	11 to 14 V
G9-4 (E) - Body ground	W-B - Body ground	Ground	Always	Below 1 V
G9-7 (IG2) - G9-4 (E)	LG - W-B	Power source (IG)	Engine switch on (IG)	11 to 14 V
G9-7 (IG2) - G9-4 (E)	LG - W-B	Power source (IG)	Engine switch off	Below 1 V
G9-8 (ACC) - G9-4 (E)	B- W-B	Power source (ACC)	Engine switch on (ACC)	11 to 14 V
G9-8 (ACC) - G9-4 (E)	B- W-B	Power source (ACC)	Engine switch off	Below 1 V
G9-15 (CANP)	R	CAN communication signal	-	-
G9-16 (CANN)	W	CAN communication signal	-	-
G9-29 (SLPD) - G9-4 (E)	L - W-B	Steering lock bar position signal	Steering locked	11 to 14 V
G9-29 (SLPD) - G9-4 (E)	L - W-B	Steering lock bar position signal	Steering unlocked	Below 1.5 V
G11-1 (USB-)	GR	USB communication line	-	-
G11-2 (USB+)	GR	USB communication line	-	-
G11-6 (USBS) - Body ground	Shielded - Body ground	Shield ground	Always	Below 1 Ω
G11-3 (USBG) - Body ground	GR - Body ground	DCM (Telematics Transceiver) power supply ground signal	Always	Below 1 Ω

CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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Lost Communication with Body Control Module "B" (U0142,U0155,U0163)

DESCRIPTION

These DTCs are stored when a malfunction occurs in the CAN communication circuit.

HINT:

If CAN communication system DTCs are stored, they may also be stored for other systems.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
U0142	Lost Communication with Body Control Module "B"	Lost communication with main body ECU (multiplex network body ECU)	CAN communication system
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	Lost communication with combination meter assembly	CAN communication system
U0163	Lost Communication with Navigation Control Module	Lost communication with radio and display receiver assembly	CAN communication system

PROCEDURE

CHECK DTC

(a) Clear the DTCs.

Body Electrical > Telematics > Clear DTCs

(b) Recheck for DTCs and check if the same DTC is output again.

Body Electrical > Telematics > Trouble Codes

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

HINT:

If CAN communication system DTCs are stored, they may also be stored for other systems.
If the CAN communication system has been inspected and repaired, these DTCs will not be output when rechecking for DTCs.
If these DTCs are output frequently, duplicate the conditions that cause the problem symptoms and perform troubleshooting again, even though the DTC was not output when rechecking for DTCs.
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GO TO CAN COMMUNICATION SYSTEM

USE SIMULATION METHOD TO CHECK

Ultrasonic Sensor(for Rear)

Brake

See More:

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Airbag System(for Gasoline Model): Front Airbag Sensor Lost Communication (LH) (B1617,B1618). Curtain Shield Airbag Sensor (RH) (B1630). Curtain Shield Airbag Sensor Lost Communication (RH) (B1632,B1633)
Front Airbag Sensor Lost Communication (LH) (B1617,B1618) DESCRIPTION The front airbag sensor LH circuit consists of the airbag ECU assembly and front airbag sensor LH. The front airbag sensor LH detects impacts to the vehicle and sends signals to the airbag ECU assembly to determine if the airbags ...