Radio Receiver Assembly Communication Stop Mode [10/2022 - ]: Procedure

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the radio and display receiver assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G138-13 (CANH) - G138-14 (CANL)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

   Result

   Result	Proceed to
   OK (w/ Stop and Start System)	A
   OK (w/o Stop and Start System)	B
   NG	C

Result: 

B 

See step  3

Result: 

C 

REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR 

Result: 

A 

See step  2

1. Disconnect the radio and display receiver assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Resistance

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

3. Reconnect the cable to the negative (-) battery terminal.
   NOTE:

   When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

   Refer to INITIALIZATION [10/2022 - 10/2023] , or refer to INITIALIZATION [10/2023 - ]

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   G3-4 (+B1) - Body ground	Always	10.5 to 16 V
   G3-16 (ACC1) - Body ground	Ignition switch ACC	10.5 to 16 V
   	Ignition switch off	Below 1 V
   G3-15 (IG) - Body ground	Ignition switch ON	11 to 14 V
   	Ignition switch off	Below 1 V

   Result

   Result	Proceed to
   OK	A
   NG (ACC1 or +B1 terminal)	B
   NG (Other terminal)	C

Result: 

A 

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY 

Refer to REMOVAL [10/2022 - ]

Result: 

B 

GO TO STOP AND START SYSTEM 

Refer to Backup Boost Converter Circuit [10/2022 - 10/2023] , or refer to Backup Boost Converter Circuit [10/2023 - ]

Result: 

C 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the radio and display receiver assembly connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Resistance

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

3. Reconnect the cable to the negative (-) battery terminal.
   NOTE:

   When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

   Refer to INITIALIZATION [10/2022 - 10/2023] , or refer to INITIALIZATION [10/2023 - ]

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   G3-4 (+B1) - Body ground	Always	11 to 14 V
   G3-16 (ACC1) - Body ground	Ignition switch ACC	11 to 14 V
   	Ignition switch off	Below 1 V
   G3-15 (IG) - Body ground	Ignition switch ON	11 to 14 V
   	Ignition switch off	Below 1 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY 

Refer to REMOVAL [10/2022 - ]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR