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

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the O152 and O178 No. 10 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. 10 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. 10 CAN Junction Connector)

   Standard Resistance

   Tester Connection	Wiring Color	Condition	Specified Condition	Connected to
   O152-1 (CANH) - O152-2 (CANL)	GR - B	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	Central gateway ECU (network gateway ECU)
   O178-1 (CANH) - O178-2 (CANL)	BE - B	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 9 CAN junction connector

   Result

   Result	Proceed to
   OK	A
   NG (Line to central gateway ECU (network gateway ECU))	B
   NG (Line to No. 9 CAN junction connector)	C

Result: 

A 

REPLACE NO. 10 CAN JUNCTION CONNECTOR 

Result: 

C 

See step  3

Result: 

B 

See step  2

1. Reconnect the O152 and O178 No. 10 CAN junction connectors.
2. Disconnect the O145 central gateway ECU (network gateway ECU) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   O145-15 (CA5H) - O145-16 (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. 10 CAN JUNCTION CONNECTOR) 

1. Reconnect the O152 and O178 No. 10 CAN junction connectors.
2. Disconnect the U57 No. 9 CAN junction connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to No. 9 CAN Junction Connector)
   *b	to No. 10 CAN Junction Connector
   *c	to No. 2 CAN Junction Terminal

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition	Connected to
   U57-3 (CANH) - U57-9 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 10 CAN junction connector
   U57-4 (CANH) - U57-10 (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. 10 CAN junction connector)	B
   NG (Line to No. 2 CAN junction terminal)	C

Result: 

A 

REPLACE NO. 9 CAN JUNCTION CONNECTOR 

Result: 

B 

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 9 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR) 

Result: 

C 

See step  4

1. Reconnect the U57 No. 9 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. 9 CAN JUNCTION CONNECTOR)