Check Bus 2 Line for Short to GND [06/2018 - 08/2020]: Procedure

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the A71 No. 2 junction connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	DLC3	-	-
   *a	Front view of wire harness connector (to No. 2 Junction Connector)	*b	to No. 4 CAN Junction Connector
   *c	to ECM	-	-

   Standard Resistance

   Tester Connection	Condition	Specified Condition	Connected to
   A71-8 (CANH) - G57-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	No. 4 CAN junction connector
   A71-19 (CANL) - G57-4 (CG)
   A71-11 (CANH) - G57-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	ECM
   A71-22 (CANL) - G57-4 (CG)

   Result

   Result	Proceed to
   OK	A
   NG (Line to ECM)	B
   NG (Line to No. 4 CAN junction connector)	C

Result: 

A 

REPLACE NO. 2 JUNCTION CONNECTOR 

Result: 

C 

See step  3

Result: 

B 

See step  2

1. Disconnect the A25 ECM connector.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	DLC3	-	-
   *a	Front view of wire harness connector (to No. 2 Junction Connector)	*b	to ECM

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A71-11 (CANH) - G57-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
   A71-22 (CANL) - G57-4 (CG)

   Result

   Result
   OK
   NG

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [06/2018 - 10/2019]  , or refer to  REMOVAL [10/2019 - 08/2021] 

Result: 

NG 

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 2 JUNCTION CONNECTOR - ECM) 

1. Disconnect the G99 No. 4 CAN junction connector.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	DLC3	-	-
   *a	Front view of wire harness connector (to No. 4 CAN Junction Connector)	*b	to No. 2 Junction Connector

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G99-11 (CANH) - G57-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
   G99-22 (CANL) - G57-4 (CG)

   Result

   Result
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR) 

Result: 

OK 

See step  4

1. Disconnect the G98 No. 4 CAN junction connector.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	DLC3	-	-
   *a	Front view of wire harness connector (to No. 4 CAN Junction Connector)	*b	to Central Gateway ECU (Network Gateway ECU)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G98-1 (CANH) - G57-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
   G98-12 (CANL) - G57-4 (CG)

   Result

   Result
   OK
   NG

Result: 

OK 

REPLACE NO. 4 CAN JUNCTION CONNECTOR 

Result: 

NG 

See step  5

1. Disconnect the G66 central gateway ECU (network gateway ECU) connector.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	DLC3	-	-
   *a	Front view of wire harness connector (to No. 4 CAN Junction Connector)	*b	to Central Gateway ECU (Network Gateway ECU)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G98-1 (CANH) - G57-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
   G98-12 (CANL) - G57-4 (CG)

   Result

   Result
   OK
   NG

Result: 

OK 

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to  REMOVAL [06/2018 - 08/2021] 

Result: 

NG 

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))