Open in Bus 2 Main Bus Line [10/2018 - ]: Procedure

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CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 3 CAN JUNCTION CONNECTOR)

Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the No. 3 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. 3 CAN Junction Connector)	*b	to No. 6 CAN Junction Connector
*c	to Central Gateway ECU (Network Gateway ECU)	-	-

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
F88-1 (CANH) - F88-7 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω	No. 6 CAN junction connector
F88-2 (CANH) - F88-8 (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. 6 CAN junction connector)	C

Result:

REPLACE NO. 3 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. 3 CAN JUNCTION CONNECTOR)

Reconnect the F88 No. 3 CAN junction connector.
Disconnect the 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
F61-18 (CA4H) - F61-17 (CA4L)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

Result

Proceed to
OK
NG

Result:

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to REMOVAL [10/2018 - 07/2022] , or refer to REMOVAL [07/2022 - ]

Result:

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 3 CAN JUNCTION CONNECTOR)

CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 6 CAN JUNCTION CONNECTOR)

Reconnect the F88 No. 3 CAN junction connector.
Disconnect the No. 6 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. 6 CAN Junction Connector)	*b	to No. 3 CAN Junction Connector
*c	to ECM	-	-

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
F93-9 (CANH) - F93-20 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω	No. 3 CAN junction connector
F93-10 (CANH) - F93-21 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω	ECM

Result

Result	Proceed to
OK	A
NG (Line to No. 3 CAN junction connector)	B
NG (Line to ECM assembly)	C

Result:

REPLACE NO. 6 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - NO. 6 CAN JUNCTION CONNECTOR)

Result:

See step 4

CHECK FOR OPEN IN CAN MAIN BUS LINES (ECM - NO. 6 CAN JUNCTION CONNECTOR)

Reconnect the F93 No. 6 CAN junction connector.
Disconnect the ECM connector.

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

*a	Front view of wire harness connector (to ECM)

Standard Resistance

Tester Connection	Condition	Specified Condition
A36-8 (CANH) - A36-18 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

Result

Proceed to
OK
NG

Result:

REPLACE ECM. Refer to REMOVAL [10/2018 - 07/2022] , or refer to REMOVAL [07/2022 - ]

Result:

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (ECM - NO. 6 CAN JUNCTION CONNECTOR)