Open in Bus 1 Main Bus Line [04/2018 -]: Procedure

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the A48 No. 1 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. 1 CAN Junction Connector)	*b	to Central Gateway ECU (Network Gateway ECU)
   *c	to No. 7 CAN Junction Connector	-	-

   Standard Resistance

   Tester Connection	Condition	Specified Condition	Connected to
   A48-3 (CANH) - A48-9 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	Central gateway ECU (network gateway ECU)
   A48-5 (CANH) - A48-11 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 7 CAN junction connector

   Result

   Result	Proceed to
   OK	A
   NG (Line to central gateway ECU (network gateway ECU))	B
   NG (Line to No. 7 CAN junction connector)	C

Result: 

A 

REPLACE NO. 1 CAN JUNCTION CONNECTOR 

Result: 

C 

See step  3

Result: 

B 

See step  2

1. Reconnect the A48 No. 1 CAN junction connector.
2. Disconnect the G52 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
   G52-23 (CA1H) - G52-9 (CAXH)	Cable disconnected from negative (-) battery terminal	Below 1 Ω
   G52-8 (CA1L) - G52-24 (CAXL)	Cable disconnected from negative (-) battery terminal	Below 1 Ω

   Result

   Result
   OK
   NG

Result: 

OK 

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to  REMOVAL [04/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 -] 

Result: 

NG 

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 1 CAN JUNCTION CONNECTOR) 

1. Reconnect the A48 No. 1 CAN junction connector.
2. Disconnect the K66 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 Central Gateway ECU (Network Gateway ECU)
   *c	to No. 1 CAN Junction Connector	-	-

   Standard Resistance

   Tester Connection	Condition	Specified Condition	Connected to
   K66-1 (CANH) - K66-11 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	Central gateway ECU (network gateway ECU)
   K66-5 (CANH) - K66-15 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 1 CAN junction connector

   Result

   Result	Proceed to
   OK	A
   NG (Line to No. 1 CAN junction connector)	B
   NG (Line to central gateway ECU (network gateway ECU))	C

Result: 

A 

REPLACE NO. 7 CAN JUNCTION CONNECTOR 

Result: 

B 

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 7 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION CONNECTOR) 

Result: 

C 

See step  4

1. Reconnect the K66 No. 7 CAN junction connector.
2. Disconnect the G52 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
   G52-23 (CA1H) - G52-9 (CAXH)	Cable disconnected from negative (-) battery terminal	Below 1 Ω
   G52-8 (CA1L) - G52-24 (CAXL)	Cable disconnected from negative (-) battery terminal	Below 1 Ω

   Result

   Result
   OK
   NG

Result: 

OK 

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to  REMOVAL [04/2018 - 08/2021]  , or refer to  REMOVAL [08/2021 -] 

Result: 

NG 

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