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

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
2. 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	-	-

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition	Connected to
   G96-1 (CANH) - G114-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	No. 7 CAN junction connector
   G96-12 (CANL) - G114-16 (BAT)
   G96-2 (CANH) - G114-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Certification ECU (smart key ECU assembly)*
   G96-13 (CANL) - G114-16 (BAT)
   G96-3 (CANH) - G114-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	No. 5 CAN junction connector
   G96-14 (CANL) - G114-16 (BAT)
   G96-4 (CANH) - G114-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Main body ECU (multiplex network body ECU)
   G96-15 (CANL) - G114-16 (BAT)
   G96-5 (CANH) - G114-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Air conditioning amplifier assembly
   G96-16 (CANL) - G114-16 (BAT)

   *: 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: 

A 

REPLACE NO. 1 CAN JUNCTION CONNECTOR 

Result: 

C 

See step  4

Result: 

D 

See step  5

Result: 

B 

See step  2

1. Reconnect the G96 No. 1 CAN junction connector.
2. 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)

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition	Connected to
   G105-9 (CANH) - G114-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	No. 1 CAN junction connector
   G105-20 (CANL) - G114-16 (BAT)
   G105-11 (CANH) - G114-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Central gateway ECU (network gateway ECU)
   G105-22 (CANL) - G114-16 (BAT)

   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: 

A 

REPLACE NO. 5 CAN JUNCTION CONNECTOR 

Result: 

C 

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

Result: 

D 

See step  5

Result: 

B 

See step  3

1. Reconnect the G105 No. 5 CAN junction connector.
2. 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

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G72-15 (CA5H) - G114-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
   G72-16 (CA5L) - G114-16 (BAT)

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) 

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

Result: 

NG 

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

1. Reconnect the G96 No. 1 CAN junction connector.
2. 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

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition	Connected to
   N52-1 (CANH) - G114-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	No. 1 CAN junction connector
   N52-7 (CANL) - G114-16 (BAT)
   N52-2 (CANH) - G114-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Combination meter assembly
   N52-8 (CANL) - G114-16 (BAT)
   N52-3 (CANH) - G114-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Multiplex network door ECU*1
   N52-9 (CANL) - G114-16 (BAT)
   N52-4 (CANH) - G114-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Position control ECU assembly*2
   N52-10 (CANL) - G114-16 (BAT)

   *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: 

A 

REPLACE NO. 7 CAN JUNCTION CONNECTOR 

Result: 

B 

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

Result: 

C 

See step  5

1. Reconnect all wire harness connectors.
2. Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the bus wire shorted to +B is connected.

   Refer to TERMINALS OF ECU [10/2022 - 10/2023]

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G72-15 (CA5H) - G114-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
   G72-16 (CA5L) - G114-16 (BAT)

   HINT: 

   • If the resistance changes to 6 kΩ 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 +B in the wire harness and repair or replace the wire harness or connector if necessary.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ECU OR SENSOR 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR