Check Bus 5 Line for Short to GND [10/2022 - 10/2023]: Procedure

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

CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 1 CAN JUNCTION CONNECTOR)

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

Disconnect the No. 1 CAN junction connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to No. 1 CAN Junction Connector)	*b	to No. 7 CAN Junction Connector
*c	to Certification ECU (Smart Key ECU Assembly) (w/ Smart Key System)	*d	to No. 5 CAN Junction Connector
*e	to Main Body ECU (Multiplex Network Body ECU)	*f	to Air Conditioning Amplifier Assembly
*g	Front view of DLC3	-	-

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

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
G96-1 (CANH) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	No. 7 CAN junction connector
G96-12 (CANL) - G114-4 (CG)		200 Ω or higher	No. 7 CAN junction connector
G96-2 (CANH) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Certification ECU (smart key ECU assembly)*
G96-13 (CANL) - G114-4 (CG)		200 Ω or higher	Certification ECU (smart key ECU assembly)*
G96-3 (CANH) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	No. 5 CAN junction connector
G96-14 (CANL) - G114-4 (CG)		200 Ω or higher	No. 5 CAN junction connector
G96-4 (CANH) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Main body ECU (multiplex network body ECU)
G96-15 (CANL) - G114-4 (CG)		200 Ω or higher	Main body ECU (multiplex network body ECU)
G96-5 (CANH) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Air conditioning amplifier assembly
G96-16 (CANL) - G114-4 (CG)		200 Ω or higher	Air conditioning amplifier assembly

*: w/ Smart Key System

Result

Result	Proceed to
OK	A
NG (No. 5 CAN junction connector CAN main wire)	B
NG (No. 7 CAN junction connector CAN main wire)	C
NG (Wire to ECU or sensor)	D

Result:

REPLACE NO. 1 CAN JUNCTION CONNECTOR

Result:

See step 4

Result:

See step 5

Result:

See step 2

CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 5 CAN JUNCTION CONNECTOR)

Reconnect the G96 No. 1 CAN junction connector.

Disconnect the No. 5 CAN junction connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to No. 5 CAN Junction Connector)	*b	Front view of DLC3
*c	to No. 1 CAN Junction Connector	*d	to Central Gateway ECU (Network Gateway ECU)

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

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
G105-9 (CANH) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	No. 1 CAN junction connector
G105-20 (CANL) - G114-4 (CG)		200 Ω or higher	No. 1 CAN junction connector
G105-11 (CANH) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Central gateway ECU (network gateway ECU)
G105-22 (CANL) - G114-4 (CG)		200 Ω or higher	Central gateway ECU (network gateway ECU)

Result

Result	Proceed to
OK	A
NG (Central gateway ECU [network gateway ECU] CAN main wire)	B
NG (No. 1 CAN junction connector CAN main wire)	C
NG (Wire to ECU or sensor)	D

Result:

REPLACE NO. 5 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION CONNECTOR)

Result:

See step 5

Result:

See step 3

CHECK FOR SHORT TO GND IN CAN BUS WIRE (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 5 CAN JUNCTION CONNECTOR)

Reconnect the G105 No. 5 CAN junction connector.

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to Central Gateway ECU [Network Gateway ECU])
*b	Front view of DLC3

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

Standard Resistance

Tester Connection	Condition	Specified Condition
G72-15 (CA5H) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
G72-16 (CA5L) - G114-4 (CG)		200 Ω or higher

Result

Proceed to
OK
NG

Result:

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

Refer to REMOVAL [10/2022 - 10/2023]

Result:

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 5 CAN JUNCTION CONNECTOR)

CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 7 CAN JUNCTION CONNECTOR)

Reconnect the G96 No. 1 CAN junction connector.

Disconnect the No. 7 CAN junction connector.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Front view of wire harness connector (to No. 7 CAN Junction Connector)	*b	to No. 1 CAN Junction Connector
*c	to Combination Meter Assembly	*d	to Multiplex Network Door ECU (w/ Power Back Door System)
*e	to Position Control ECU Assembly (w/ Memory)	*f	Front view of DLC3

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

Standard Resistance

Tester Connection	Condition	Specified Condition	Connected to
N52-1 (CANH) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	No. 1 CAN junction connector
N52-7 (CANL) - G114-4 (CG)		200 Ω or higher	No. 1 CAN junction connector
N52-2 (CANH) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Combination meter assembly
N52-8 (CANL) - G114-4 (CG)		200 Ω or higher	Combination meter assembly
N52-3 (CANH) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Multiplex network door ECU*1
N52-9 (CANL) - G114-4 (CG)		200 Ω or higher	Multiplex network door ECU*1
N52-4 (CANH) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Position control ECU assembly*2
N52-10 (CANL) - G114-4 (CG)		200 Ω or higher	Position control ECU assembly*2

*1: w/ Power Back Door System

*2: w/ Memory

Result

Result	Proceed to
OK	A
NG (No. 1 CAN junction connector CAN main wire)	B
NG (Wire to ECU or sensor)	C

Result:

REPLACE NO. 7 CAN JUNCTION CONNECTOR

Result:

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 7 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION CONNECTOR)

Result:

See step 5

CHECK FOR SHORT TO GND IN CAN BUS WIRE (ECU, SENSOR)

Reconnect all wire harness connectors.
Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the bus wire shorted to ground is connected.
Refer to TERMINALS OF ECU [10/2022 - 10/2023]

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

*a	Component with harness connected (Central Gateway ECU [Network Gateway ECU])
*b	Front view of DLC3

Standard Resistance

Tester Connection	Condition	Specified Condition
G72-15 (CA5H) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
G72-16 (CA5L) - G114-4 (CG)		200 Ω or higher

HINT:

If the resistance changes to 200 Ω or higher when the connector is disconnected from the ECU or sensor, there may be a short in the ECU or sensor.
If the resistance does not become normal when the connector is disconnected from the ECU or sensor, check for a short to ground in the wire harness and repair or replace the wire harness or connector if necessary.

Result

Proceed to
OK
NG

Result:

REPLACE ECU OR SENSOR

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR