Check Bus 2 Lines for Short Circuit [08/2020 - 08/2021]: 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

   *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) - A71-19 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	No. 4 CAN junction connector
   A71-11 (CANH) - A71-22 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω	ECM

   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 or A28 ECM connector.
2. 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. 2 Junction Connector)

   *b

   to ECM

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A71-11 (CANH) - A71-22 (CANL)	Cable disconnected from negative (-) battery terminal	1 MΩ or higher

   Result

   Result	Proceed to
   OK (for 2GR-FKS)	A
   OK (for A25A-FKS)	B
   NG	C

Result: 

A 

REPLACE ECM. Refer to  REMOVAL [10/2019 - 08/2021] 

Result: 

B 

REPLACE ECM. Refer to  REMOVAL [08/2020 - 08/2021] 

Result: 

C 

REPAIR OR REPLACE CAN MAIN BUS LINES 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

   *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	Connected to
   G99-11 (CANH) - G99-22 (CANL)	Cable disconnected from negative (-) battery terminal	1 MΩ or higher	No. 2 junction connector

   Result

   Result
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE CAN MAIN BUS LINES 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

   *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) - G98-12 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

   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

   *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) - G98-12 (CANL)	Cable disconnected from negative (-) battery terminal	1 MΩ or higher

   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 LINES OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))