Open in Bus 4 Main Bus Line [01/2019 - 09/2022]: Procedure

WARNING: This page is about a different variant/trim than selected.

CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 5 CAN JUNCTION CONNECTOR)

Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the I96 No. 5 CAN junction connector.

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. 5 CAN Junction Connector)	*b	to No. 4 CAN Junction Connector
*c	to Central Gateway ECU (Network Gateway ECU)	-	-

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
I96-1 (CANH) - I96-7 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω	No. 4 CAN junction connector
I96-2 (CANH) - I96-8 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω	Central gateway ECU (network gateway ECU)

Result

Result	Proceed to
OK	A
NG (Line to central gateway ECU (network gateway ECU))	B
NG (Line to No. 4 CAN junction connector)	C

Result:

REPLACE NO. 5 CAN JUNCTION CONNECTOR

Result:

See step 3

Result:

See step 2

CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 5 CAN JUNCTION CONNECTOR)

Reconnect the I96 No. 5 CAN junction connector.
Disconnect the I53 central gateway ECU (network gateway ECU) connector.

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
I53-22 (CA2H) - I53-7 (CA2L)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

Result

Result
OK
NG

Result:

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

Refer to REMOVAL [06/2018 - 09/2022]

Result:

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 5 CAN JUNCTION CONNECTOR)

CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 4 CAN JUNCTION CONNECTOR)

Reconnect the I96 No. 5 CAN junction connector.
Disconnect the I95 No. 4 CAN junction connector.

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. 5 CAN Junction Connector
*c	to Airbag Sensor Assembly	-	-

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
I95-7 (CANH) - I95-18 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω	No. 5 CAN junction connector
I95-8 (CANH) - I95-19 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω	Airbag sensor assembly

Result

Result	Proceed to
OK	A
NG (Line to No. 5 CAN junction connector)	B
NG (Line to Airbag sensor assembly)	C

Result:

REPLACE NO. 4 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 5 CAN JUNCTION CONNECTOR)

Result:

See step 4

CHECK FOR OPEN IN CAN MAIN BUS LINES (AIRBAG SENSOR ASSEMBLY - NO. 4 CAN JUNCTION CONNECTOR)

Reconnect the I95 No. 4 CAN junction connector.
Disconnect the I47 airbag sensor assembly connector.

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

*a	Front view of wire harness connector (to Airbag Sensor Assembly)

Standard Resistance

Tester Connection	Condition	Specified Condition
I47-26 (CANH) - I47-27 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

Result

Result
OK
NG

Result:

REPLACE AIRBAG SENSOR ASSEMBLY

Refer to REMOVAL [01/2019 - 03/2019] , or refer to REMOVAL [03/2019 - 09/2022]

Result:

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (AIRBAG SENSOR ASSEMBLY - NO. 4 CAN JUNCTION CONNECTOR)