Open in Bus 4 Main Bus Line [10/2018 - ]: Procedure

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
2. Disconnect the No. 7 CAN junction connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to No. 7 CAN Junction Connector)	*b	to No. 4 CAN Junction Connector
   *c	to Central Gateway ECU (Network Gateway ECU)	-	-

   Standard Resistance

   Tester Connection	Condition	Specified Condition	Connected to
   F94-1 (CANH) - F94-11 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω	No. 4 CAN junction connector
   F94-2 (CANH) - F94-12 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω	Central gateway ECU (network gateway ECU)

   Result

   Result	Proceed to
   OK	A
   NG (Line to central gateway ECU (network gateway ECU))	B
   NG (Line to No. 4 CAN junction connector)	C

Result: 

A 

REPLACE NO. 7 CAN JUNCTION CONNECTOR 

Result: 

C 

See step  3

Result: 

B 

See step  2

1. Reconnect the F94 No. 7 CAN junction connector.
2. Disconnect the central gateway ECU (network gateway ECU) connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Central Gateway ECU (Network Gateway ECU))

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F61-22 (CA2H) - F61-7 (CA2L)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to  REMOVAL [10/2018 - 07/2022]  , or refer to  REMOVAL [07/2022 - ] 

Result: 

NG 

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 7 CAN JUNCTION CONNECTOR) 

1. Reconnect the F94 No. 7 CAN junction connector.
2. Disconnect the No. 4 CAN junction connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to No. 4 CAN Junction Connector)	*b	to Airbag ECU Assembly
   *c	to No. 7 CAN Junction Connector	-	-

   Standard Resistance

   Tester Connection	Condition	Specified Condition	Connected to
   F89-5 (CANH) - F89-16 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω	No. 7 CAN junction connector
   F89-6 (CANH) - F89-17 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω	Airbag ECU assembly

   Result

   Result	Proceed to
   OK	A
   NG (Line to No. 7 CAN junction connector)	B
   NG (Line to Airbag ECU assembly)	C

Result: 

A 

REPLACE NO. 4 CAN JUNCTION CONNECTOR 

Result: 

B 

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 7 CAN JUNCTION CONNECTOR) 

Result: 

C 

See step  4

1. Reconnect the F89 No. 4 CAN junction connector.
2. Disconnect the airbag ECU assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Airbag ECU Assembly)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F57-26 (CANH) - F57-27 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE AIRBAG ECU ASSEMBLY. Refer to  REMOVAL [10/2018 - 07/2022]  , or refer to  REMOVAL [07/2022 - ] 

Result: 

NG 

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (AIRBAG ECU CONNECTOR ASSEMBLY - NO. 4 CAN JUNCTION CONNECTOR)