Open in Bus 5 Main Bus Line [09/2020 - ]: Procedure

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the O151 and O152 No. 9 CAN junction connectors.
3. Measure the resistance according to the value(s) in the table below.

   HINT: 

   • Distinguish between the connectors connected to the No. 9 CAN junction connector by checking the color of the communication wire.
   • Before disconnecting the connectors, make a note of where it is connected.
   • Reconnect the connector to its original position.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Vehicle wire harness connector connected to CAN junction connector

   *b

   Rear view of wire harness connector (to No. 9 CAN Junction Connector)

   Standard Resistance

   Tester Connection	Wiring Color	Condition	Specified Condition	Connected to
   O151-1 (CANH) - O151-2 (CANL)	GR - B	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	Central gateway ECU (network gateway ECU)
   O152-1 (CANH) - O152-2 (CANL)	BE - B	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 12 CAN junction connector

   Result

   Result	Proceed to
   OK	A
   NG (Line to central gateway ECU (network gateway ECU))	B
   NG (Line to No. 12 CAN junction connector)	C

Result: 

A 

REPLACE NO. 9 CAN JUNCTION CONNECTOR 

Result: 

C 

See step  3

Result: 

B 

See step  2

1. Reconnect the O151 and O152 No. 9 CAN junction connectors.
2. Disconnect the O142 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
   O142-15 (CA5H) - O142-16 (CA5L)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

   Result

   Result
   OK
   NG

Result: 

OK 

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to  REMOVAL [11/2017 - ] 

Result: 

NG 

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 9 CAN JUNCTION CONNECTOR) 

1. Reconnect the O151 and O152 No. 9 CAN junction connectors.
2. Disconnect the U62 No. 12 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. 12 CAN Junction Connector)	*b	to No. 9 CAN Junction Connector
   *c	to No. 2 CAN Junction Terminal	-	-

   Standard Resistance

   Tester Connection	Condition	Specified Condition	Connected to
   U62-3 (CANH) - U62-9 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 9 CAN junction connector
   U62-4 (CANH) - U62-10 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 2 CAN junction terminal

   Result

   Result	Proceed to
   OK	A
   NG (Line to No. 9 CAN junction connector)	B
   NG (Line to No. 2 CAN junction terminal)	C

Result: 

A 

REPLACE NO. 12 CAN JUNCTION CONNECTOR 

Result: 

B 

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 12 CAN JUNCTION CONNECTOR - NO. 9 CAN JUNCTION CONNECTOR) 

Result: 

C 

See step  4

1. Reconnect the U62 No. 12 CAN junction connector.
2. Disconnect the O102 No. 2 CAN junction terminal connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   O102-3 (CANH) - O102-2 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to No. 2 CAN Junction Terminal)

   Result

   Result
   OK
   NG

Result: 

OK 

REPLACE NO. 2 CAN JUNCTION TERMINAL 

Result: 

NG 

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 2 CAN JUNCTION TERMINAL - NO. 12 CAN JUNCTION CONNECTOR)