Open in Bus 2 Main Bus Line [10/2015 - ]: Procedure

CHECK FOR OPEN IN CAN BUS LINES (CENTRAL GATEWAY ECU BRANCH LINE)

Disconnect the cable from the negative (-) auxiliary battery terminal.
Disconnect the D131 No. 2 CAN junction connectors.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
D129-18 (CA4H) - D129-17 (CA4L)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Component with harness connected (Central Gateway ECU)

Result

Result
OK
NG

Result:

See step 5

Result:

See step 2

CHECK FOR OPEN IN CAN BUS LINES (ECM)

Reconnect the D131 No. 2 CAN junction connectors.

Disconnect the A18 ECM connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

Standard Resistance

Tester Connection	Condition	Specified Condition
A18-13 (CANH) - A18-26 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

Result

Result
OK
NG

Result:

REPLACE ECM. Refer to REMOVAL [10/2014 - ]

Result:

See step 3

CHECK FOR OPEN IN CAN BUS LINES (COMBINATION METER ASSEMBLY)

Reconnect the A18 ECM connector.

Disconnect the D9 combination meter assembly connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to Combination Meter Assembly)

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

Standard Resistance

Tester Connection	Condition	Specified Condition
D9-16 (CANH) - D9-15 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

Result

Result
OK
NG

Result:

REPLACE COMBINATION METER ASSEMBLY. Refer to REMOVAL [10/2014 - ]

Result:

See step 4

CHECK FOR OPEN IN CAN BUS LINES (NO. 1 CAN JUNCTION CONNECTOR)

Reconnect the D9 combination meter assembly connector.
Disconnect the D73 and D72 No. 1 CAN junction connectors.

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Rear view of wire harness connector (to No. 1 CAN Junction Connector)
*b	to No. 2 CAN Junction Connector
*c	to Combination Meter Assembly

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
D73-1 (CANH) - D73-2 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω	Combination meter assembly
D72-1 (CANH) - D72-2 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω	No. 2 CAN junction connector

WIRING COLOR:

Code	Color (CANH Side)	Color (CANL Side)	Connected to
D73	R	W	Combination meter assembly
D72	B	W	No. 2 CAN junction connector

HINT:

Connectors that connect to the CAN junction connector can be distinguished by the color of their CAN bus lines.
Reconnecting the connectors to non-original positions on the CAN junction connector does not affect system performance. However, it is preferred to reconnect the connectors to their original positions to avoid negative effects on the wiring such as tension on the wire harnesses, and to make future maintenance easier.

Result

Result	Proceed to
OK	A
NG (Combination meter assembly main line)	B
NG (No. 2 CAN junction connector main line)	C

Result:

REPLACE NO. 1 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 1 CAN JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)

Result:

See step 6

CHECK FOR OPEN IN CAN BUS LINES (CENTRAL GATEWAY ECU)

Reconnect the D131 No. 2 CAN junction connectors.
Disconnect the D129 central gateway ECU connector.

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

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

Standard Resistance

Tester Connection	Condition	Specified Condition
D129-18 (CA4H) - D129-17 (CA4L)	Cable disconnected from negative (-) auxiliary battery terminal	54 to 69 Ω

Result

Result
OK
NG

Result:

REPLACE CENTRAL GATEWAY ECU. Refer to REMOVAL [10/2015 - ]

Result:

REPAIR OR REPLACE CAN BRANCH BUS LINE CONNECTED TO CENTRAL GATEWAY ECU

CHECK FOR OPEN IN CAN BUS LINES (NO. 2 CAN JUNCTION CONNECTOR)

Reconnect the D73 and D72 No. 1 CAN junction connectors.
Disconnect the D78 and D81 No. 2 CAN junction connectors.

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

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

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
D78-1 (CANH) - D78-2 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω	No. 1 CAN junction connector
D81-1 (CANH) - D81-2 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω	ECM

WIRING COLOR:

Code	Color (CANH Side)	Color (CANL Side)	Connected to
D81	P	W	ECM
D78	B	W	No. 1 CAN Junction Connector

HINT:

Connectors that connect to the CAN junction connector can be distinguished by the color of their CAN bus lines.
Reconnecting the connectors to non-original positions on the CAN junction connector does not affect system performance. However, it is preferred to reconnect the connectors to their original positions to avoid negative effects on the wiring such as tension on the wire harnesses, and to make future maintenance easier.

Result

Result	Proceed to
OK	A
NG (ECM main line)	B
NG (No. 1 CAN junction connector main line)	C

Result:

REPLACE NO. 2 CAN JUNCTION CONNECTOR

Result:

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

Result:

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 2 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION CONNECTOR)