Check Bus 7 Line [03/2024 - ]: Procedure

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CHECK FOR OPEN IN CAN MAIN BUS LINES

Disconnect the cable from the negative (-) battery terminal.

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Component with harness connected (Central Gateway ECU (Network Gateway ECU))

Standard Resistance

Tester Connection	Condition	Specified Condition
D71-5 (CA8H) - D71-6 (CA8L)	Cable disconnected from negative (-) battery terminal	Below 70 Ω

Result

Result
OK
NG

Result:

See step 11

Result:

See step 2

CHECK FOR SHORT IN CAN BUS LINES

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Component with harness connected (Central Gateway ECU (Network Gateway ECU))

Standard Resistance

Tester Connection	Condition	Specified Condition
D71-5 (CA8H) - D71-6 (CA8L)	Cable disconnected from negative (-) battery terminal	54 Ω or higher

Result

Result
OK
NG

Result:

See step 9

Result:

See step 3

CHECK FOR SHORT TO +B IN CAN BUS LINE

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*1	DLC3	-	-
*a	Component with harness connected (Central Gateway ECU (Network Gateway ECU))	-	-

Standard Resistance

Tester Connection	Condition	Specified Condition
D71-5 (CA8H) - D66-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
D71-6 (CA8L) - D66-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

Result

Result
OK
NG

Result:

See step 7

Result:

See step 4

CHECK FOR SHORT TO GND IN CAN BUS LINE

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*1	DLC3	-	-
*a	Component with harness connected (Central Gateway ECU (Network Gateway ECU))	-	-

Standard Resistance

Tester Connection	Condition	Specified Condition
D71-5 (CA8H) - D66-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
D71-6 (CA8L) - D66-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

Result

Result
OK
NG

Result:

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to REMOVAL [11/2021 - ]

Result:

See step 5

CHECK FOR SHORT TO GND IN CAN BUS LINE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

Disconnect the D71 central gateway ECU (network gateway ECU) connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
D71-5 (CA8H) - D66-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
D71-6 (CA8L) - D66-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

Result

Result
OK
NG

Result:

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to REMOVAL [11/2021 - ]

Result:

See step 6

CHECK FOR SHORT TO GND IN CAN BUS LINE (OPTION CONNECTOR (BUS BUFFER ECU))

Disconnect the D84 option connector (bus buffer ECU) connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
D84-2 (CAN+) - D66-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
D84-1 (CAN-) - D66-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

Result

Result
OK
NG

Result:

REPAIR OR REPLACE CAN COMPATIBLE OPTIONAL DEVICES

Result:

REPAIR OR REPLACE CAN BUS LINE OR CONNECTOR (OPTION CONNECTOR (BUS BUFFER ECU) - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

CHECK FOR SHORT TO +B IN CAN BUS LINE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

Disconnect the D71 central gateway ECU (network gateway ECU) connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
D71-5 (CA8H) - D66-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
D71-6 (CA8L) - D66-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

Result

Result
OK
NG

Result:

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to REMOVAL [11/2021 - ]

Result:

See step 8

CHECK FOR SHORT TO +B IN CAN BUS LINE (OPTION CONNECTOR (BUS BUFFER ECU))

Disconnect the D84 option connector (bus buffer ECU) connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
D84-2 (CAN+) - D66-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
D84-1 (CAN-) - D66-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

Result

Result
OK
NG

Result:

REPAIR OR REPLACE CAN COMPATIBLE OPTIONAL DEVICES

Result:

REPAIR OR REPLACE CAN BUS LINE OR CONNECTOR (OPTION CONNECTOR (BUS BUFFER ECU) - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

CHECK FOR SHORT IN CAN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

Disconnect the D71 central gateway ECU (network gateway ECU) connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
D71-5 (CA8H) - D71-6 (CA8L)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

Result

Result
OK
NG

Result:

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to REMOVAL [11/2021 - ]

Result:

See step 10

CHECK FOR SHORT IN CAN BUS LINES (OPTION CONNECTOR (BUS BUFFER ECU))

Reconnect the D71 central gateway ECU (network gateway ECU) connector.
Disconnect the D84 option connector (bus buffer ECU) connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
D84-2 (CAN+) - D84-1 (CAN-)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

Result

Result
OK
NG

Result:

REPAIR OR REPLACE CAN COMPATIBLE OPTIONAL DEVICES

Result:

REPAIR OR REPLACE CAN BUS LINES OR CONNECTOR (OPTION CONNECTOR (BUS BUFFER ECU) - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

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

Disconnect the D71 central gateway ECU (network gateway ECU) connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
D71-5 (CA8H) - D71-6 (CA8L)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

Result

Result
OK
NG

Result:

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU). Refer to REMOVAL [11/2021 - ]

Result:

See step 12

CHECK FOR OPEN IN CAN BUS LINES (OPTION CONNECTOR (BUS BUFFER ECU))

Reconnect the D71 central gateway ECU (network gateway ECU) connector.
Disconnect the D84 option connector (bus buffer ECU) connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
D84-2 (CAN+) - D84-1 (CAN-)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

Result

Result
OK
NG

Result:

REPAIR OR REPLACE CAN COMPATIBLE OPTIONAL DEVICES

Result:

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (OPTION CONNECTOR (BUS BUFFER ECU) - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))