Check CAN Bus Line for Short to +B [06/2016 - 03/2017]: Procedure

1. Disconnect the wire harness connector from the D43 CAN No. 2 junction connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition	Connected to
   D43-1 - D10-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	CAN No. 1 junction connector
   D43-12 - D10-16 (BAT)
   D43-2 - D10-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Combination meter assembly
   D43-13 - D10-16 (BAT)
   D43-3 - D10-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Main body ECU (network gateway ECU)
   D43-14 - D10-16 (BAT)
   D43-5 - D10-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	DLC3
   D43-16 - D10-16 (BAT)
   D43-6 - D10-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Steering angle sensor (spiral cable sub-assembly)
   D43-17 - D10-16 (BAT)
   D43-7 - D10-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	PSP (option connector)
   D43-18 - D10-16 (BAT)
   D43-8 - D10-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Airbag ECU assembly
   D43-19 - D10-16 (BAT)
   D43-9 - D10-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	ECM
   D43-20 - D10-16 (BAT)

   TEXT IN ILLUSTRATION
   
   

   *1	DLC3
   *a	Front view of wire harness connector (to CAN No. 2 Junction Connector)
   *b	to CAN No. 1 Junction Connector
   *c	to Combination Meter Assembly
   *d	to Main Body ECU (Network Gateway ECU)
   *e	to DLC3
   *f	to Steering Angle Sensor (Spiral Cable Sub-assembly)
   *g	to PSP (Option Connector)
   *h	to Airbag ECU Assembly
   *i	to ECM

   Result

   Result	Proceed to
   OK	A
   NG (CAN No. 1 junction connector main line)	B
   NG (ECM main line)	C
   NG (ECU or sensor branch line)	D
   NG (DLC3 branch line or PSP (option connector) branch line)	E

Result: 

A 

REPLACE CAN NO. 2 JUNCTION CONNECTOR 

Result: 

C 

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 2 J/C - ECM) 

Result: 

D 

See step  3

Result: 

E 

REPAIR OR REPLACE CAN BRANCH LINE CONNECTED TO DLC3 OR PSP (OPTION CONNECTOR) 

Result: 

B 

See step  2

1. Disconnect the wire harness connector from the A17 CAN No. 1 junction connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition	Connected to
   A17-5 - D10-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	TCM
   A17-16 - D10-16 (BAT)
   A17-6 - D10-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Skid control ECU (brake actuator assembly)
   A17-17 - D10-16 (BAT)
   A17-7 - D10-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	CAN No. 2 junction connector
   A17-18 - D10-16 (BAT)
   A17-8 - D10-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher	Power steering ECU assembly
   A17-19 - D10-16 (BAT)

   TEXT IN ILLUSTRATION
   
   

   *1	DLC3
   *a	Front view of wire harness connector (to CAN No. 1 Junction Connector)
   *b	to TCM
   *c	to Skid Control ECU (Brake Actuator Assembly)
   *d	to CAN No. 2 Junction Connector
   *e	to Power Steering ECU Assembly

   Result

   Result	Proceed to
   OK	A
   NG (CAN No. 2 junction connector main line)	B
   NG (skid control ECU (brake actuator assembly) main line)	C
   NG (ECU or sensor branch line)	D

Result: 

A 

REPLACE CAN NO. 1 JUNCTION CONNECTOR 

Result: 

B 

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 2 J/C - CAN NO. 1 J/C) 

Result: 

C 

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN NO. 1 J/C - SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)) 

Result: 

D 

See step  3

1. Reconnect all the wire harness connectors (the A17 CAN No. 1 junction connector and D43 CAN No. 2 junction connector).
2. Disconnect the ECU or sensor connected to the CAN bus line that is shorted to +B.

   HINT: 

   If the ECU or sensor has multiple connectors, disconnect the connector that includes the CAN bus lines. To determine the ECU or sensor that is connected to the shorted bus line, refer to the terminals of ECU tables (Refer to TERMINALS OF ECU [06/2016 - 03/2017] ).

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D10-6 (CANH) - D10-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
   D10-14 (CANL) - D10-16 (BAT)

   TEXT IN ILLUSTRATION
   
   

   *1

   DLC3

   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).

Result: 

OK 

REPLACE CORRESPONDING ECU OR SENSOR 

Result: 

NG 

REPAIR OR REPLACE REPAIR OR REPLACE CORRESPONDING ECU/SENSOR WIRE OR CONNECTOR