Toyota Avalon (XX50): Radio Receiver Assembly Communication Stop Mode. Rear Television Camera Communication Stop Mode. Restraints Occupant Classification System Module Communication Stop Mode

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Power Source, Network / Networking / Can Communication System(for Gasoline Model) / Radio Receiver Assembly Communication Stop Mode. Rear Television Camera Communication Stop Mode. Restraints Occupant Classification System Module Communication Stop Mode

Radio Receiver Assembly Communication Stop Mode

DESCRIPTION

Detection Item	Symptom	Trouble Area
Radio Receiver Assembly Communication Stop Mode	Any of the following conditions are met: Communication stop for "Display and Navigation (AVN)" is indicated on the "Communication Bus Check" screen of the Techstream. Click here Communication stop history for "Display and Navigation (AVN)" is indicated on the "Communication Bus Check (Detail)" screen of the Techstream. (The Lost Communication Time value for "Display and Navigation (AVN)" is 6 or more.) Click here Communication system DTCs (DTCs that start with U) that correspond to "Radio Receiver Assembly Communication Stop Mode" in "DTC Combination Table" are output. Click here	Radio and display receiver assembly branch line or connector Power source circuit of radio and display receiver assembly Radio and display receiver assembly ground circuit Radio and display receiver assembly

Detection Item

Symptom

Trouble Area

Radio Receiver Assembly Communication Stop Mode

Any of the following conditions are met:

Communication stop for "Display and Navigation (AVN)" is indicated on the "Communication Bus Check" screen of the Techstream.
Click here
Communication stop history for "Display and Navigation (AVN)" is indicated on the "Communication Bus Check (Detail)" screen of the Techstream. (The Lost Communication Time value for "Display and Navigation (AVN)" is 6 or more.)
Click here
Communication system DTCs (DTCs that start with U) that correspond to "Radio Receiver Assembly Communication Stop Mode" in "DTC Combination Table" are output.
Click here

Radio and display receiver assembly branch line or connector
Power source circuit of radio and display receiver assembly
Radio and display receiver assembly ground circuit
Radio and display receiver assembly

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

NOTICE:

Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.
Click here
Before measuring the resistance of the CAN bus, turn the engine switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.
Click here
After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.
DTC check procedure: Turn the engine switch on (IG) and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.
After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed as normal.
Click here
Inspect the fuses for circuits related to this system before performing the following procedure.

HINT:

Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.

PROCEDURE

1.	CHECK FOR OPEN IN CAN BUS LINES (RADIO AND DISPLAY RECEIVER ASSEMBLY BRANCH LINE)

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Disconnect the G2 radio and display receiver assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
G2-13 (CANH) - G2-14 (CANL)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

*a	Front view of wire harness connector (to Radio and Display Receiver Assembly)

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY)

2.	CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

(a) Disconnect the G3 radio and display receiver assembly connector.

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

Front view of wire harness connector

(to Radio and Display Receiver Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
G3-1 (GND1) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
G2-19 (IG) - Body ground	Engine switch on (IG)	11 to 14 V
G3-4 (+B1) - Body ground	Always	11 to 14 V
G3-15 (ACC1) - Body ground	Engine switch on (ACC)	11 to 14 V

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

Rear Television Camera Communication Stop Mode

DESCRIPTION

Detection Item	Symptom	Trouble Area
Rear Television Camera Communication Stop Mode	Any of the following conditions are met: Communication stop for "Parking Assist Monitor System / Rear Camera" is indicated on the "Communication Bus Check" screen of the Techstream. Click here Communication stop history for "Parking Assist Monitor System / Rear Camera" is indicated on the "Communication Bus Check (Detail)" screen of the Techstream. (The Lost Communication Time value for "Parking Assist Monitor System / Rear Camera" is 6 or more.) Click here Communication system DTCs (DTCs that start with U) that correspond to "Rear Television Camera Communication Stop Mode" in "DTC Combination Table" are output. Click here	Television camera assembly branch line or connector Power source circuit of Television camera assembly Television camera assembly ground circuit Television camera assembly

Detection Item

Symptom

Trouble Area

Rear Television Camera Communication Stop Mode

Any of the following conditions are met:

Communication stop for "Parking Assist Monitor System / Rear Camera" is indicated on the "Communication Bus Check" screen of the Techstream.
Click here
Communication stop history for "Parking Assist Monitor System / Rear Camera" is indicated on the "Communication Bus Check (Detail)" screen of the Techstream. (The Lost Communication Time value for "Parking Assist Monitor System / Rear Camera" is 6 or more.)
Click here
Communication system DTCs (DTCs that start with U) that correspond to "Rear Television Camera Communication Stop Mode" in "DTC Combination Table" are output.
Click here

Television camera assembly branch line or connector
Power source circuit of Television camera assembly
Television camera assembly ground circuit
Television camera assembly

WIRING DIAGRAM

w/ Panoramic View Monitor System:

w/o Panoramic View Monitor System:

CAUTION / NOTICE / HINT

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

NOTICE:

Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.
Click here
Before measuring the resistance of the CAN bus, turn the engine switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.
Click here
After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.
DTC check procedure: Turn the engine switch on (IG) and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.
After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed as normal.
Click here
Inspect the fuses for circuits related to this system before performing the following procedure.

HINT:

Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.

PROCEDURE

1.	CHECK VEHICLE TYPE

(a) Check vehicle type.

Result	Proceed to
w/ Panoramic View Monitor System	A
w/o Panoramic View Monitor System	B

GO TO STEP 4

2.	CHECK FOR OPEN IN CAN BUS LINES (TELEVISION CAMERA ASSEMBLY BRANCH LINE)

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Disconnect the P7 television camera assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
P7-4 (CANH) - P7-1 (CANL)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

*a	Front view of wire harness connector (to Television Camera Assembly)

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (TELEVISION CAMERA ASSEMBLY)

3.	CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
P7-5 (CGND) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

*a	Front view of wire harness connector (to Television Camera Assembly)

(b) Reconnect the cable to the negative (-) battery terminal.

Standard Voltage:

Tester Connection	Condition	Specified Condition
P7-6 (CB+) - Body ground	Engine switch on (ACC)	11 to 14 V

REPLACE TELEVISION CAMERA ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

4.	CHECK FOR OPEN IN CAN BUS LINES (TELEVISION CAMERA ASSEMBLY BRANCH LINE)

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Disconnect the P19 television camera assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
P19-4 (CANH) - P19-1 (CANL)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

*a	Front view of wire harness connector (to Television Camera Assembly)

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (TELEVISION CAMERA ASSEMBLY)

5.	CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
P19-5 (CGND) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

*a	Front view of wire harness connector (to Television Camera Assembly)

(b) Reconnect the cable to the negative (-) battery terminal.

Standard Voltage:

Tester Connection	Condition	Specified Condition
P19-6 (CB+) - Body ground	Engine switch on (ACC)	5.5 to 7.05 V

REPLACE TELEVISION CAMERA ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

Restraints Occupant Classification System Module Communication Stop Mode

DESCRIPTION

Detection Item

Symptom

Trouble Area

Restraints Occupant Classification System Module Communication Stop Mode

Any of the following conditions are met:

Communication stop for "Occupant Detection" is indicated on the "Communication Bus Check" screen of the Techstream.
Click here
Communication stop history for "Occupant Detection" is indicated on the "Communication Bus Check (Detail)" screen of the Techstream. (The Lost Communication Time value for "Occupant Detection" is 6 or more.)
Click here
Communication system DTCs (DTCs that start with U) that correspond to "Restraints Occupant Classification System Module Communication Stop Mode" in "DTC Combination Table" are output.
Click here

Occupant detection ECU branch line or connector
Power source circuit of occupant detection ECU
Occupant detection ECU ground circuit
Occupant detection ECU

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

NOTICE:

Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.
Click here
Before measuring the resistance of the CAN bus, turn the engine switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.
Click here
After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.
DTC check procedure: Turn the engine switch on (IG) and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.
After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed as normal.
Click here
Inspect the fuses for circuits related to this system before performing the following procedure.

HINT:

Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.

PROCEDURE

1.	CHECK FOR OPEN IN CAN BUS LINES (OCCUPANT DETECTION ECU BRANCH LINE)

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Disconnect the R7 occupant detection ECU connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
R7-5 (CANP) - R7-4 (CANN)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

*a	Front view of wire harness connector (to Occupant Detection ECU)

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (OCCUPANT DETECTION ECU)

2.	CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
R7-10 (GND) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

*a	Front view of wire harness connector (to Occupant Detection ECU)

(b) Reconnect the cable to the negative (-) battery terminal.

Standard Voltage:

Tester Connection	Condition	Specified Condition
R7-6 (IG) - Body ground	Engine switch on (IG)	11 to 14 V

REPLACE OCCUPANT DETECTION ECU

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

Problem Symptoms Table

Skid Control ECU Communication Stop Mode. Suspension Control ECU Communication Stop Mode. System Description

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