Short to B+ in CAN Bus Line

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: Short to B+ in CAN Bus Line

Short to B+ in CAN Bus Line

DESCRIPTION

There may be a short circuit between the CAN bus line and +B when there is resistance between terminals 6 (CANH) and 16 (BAT) or terminals 14 (CANL) and 16 (BAT) of the DLC3.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK CAN BUS LINE FOR SHORT TO +B (DLC3 BRANCH WIRE)




(a) Disconnect the J15 J/C1 connector.
(b) Measure the resistance of the DLC3.
Standard resistance:






NG -- REPLACE DLC3 BRANCH WIRE AND CONNECTOR (CANH, CANL)
OK -- Continue to next step.

2. CONNECT CONNECTOR
(a) Reconnect the J15 J/C1 connector.
NEXT -- Continue to next step.

3. CHECK CAN BUS LINE FOR SHORT TO +B (CAN BUSES TO J/C2)




(a) Disconnect the J18 J/C2 connector.
(b) Measure the resistance of the DLC3.
Standard resistance:






OK -- CONNECT CONNECTOR
NG -- Continue to next step.

4. CONNECT CONNECTOR
(a) Reconnect the J18 J/C2 connector.
NEXT -- Continue to next step.

5. CHECK CAN BUS LINE FOR SHORT TO +B (BATTERY ECU)




(a) Disconnect the B11 battery ECU connector.
(b) Measure the resistance of the DLC3.
Standard resistance:






OK -- REPLACE BATTERY ECU
NG -- Continue to next step.

6. CHECK CAN BUS LINE FOR SHORT TO +B (BATTERY ECU - J/C1)




(a) Disconnect the J15 J/C1 connector.
(b) Measure the resistance of the wire harness side connectors.
Standard resistance:





HINT: Measure the resistance with the B11 battery ECU connector disconnected.

NG -- REPLACE CAN MAIN WIRE AND CONNECTOR (BATTERY ECU - J/C1)
OK -- Continue to next step.

7. CONNECT CONNECTOR
(a) Reconnect the B11 battery ECU connector and J15 J/C1 connector.
NEXT -- Continue to next step.

8. CHECK CAN BUS LINE FOR SHORT TO +B (POWER STEERING ECU)




(a) Disconnect the P8 power steering ECU connector.
(b) Measure the resistance of the DLC3.
Standard resistance:






OK -- REPLACE POWER STEERING ECU
NG -- Continue to next step.

9. CHECK CAN BUS LINE FOR SHORT TO +B (POWER STEERING ECU BRANCH WIRE)




(a) Disconnect the J15 J/C1 connector.
(b) Measure the resistance of the wire harness side connectors.
Standard resistance:





HINT: Measure the resistance with the P8 power steering ECU connector disconnected.

NG -- REPLACE POWER STEERING ECU BRANCH WIRE AND CONNECTOR (CANH, CANL)
OK -- Continue to next step.

10. CONNECT CONNECTOR
(a) Reconnect the P8 power steering ECU and J15 J/C1 connector.
NEXT -- Continue to next step.

11. CHECK CAN BUS LINE FOR SHORT TO +B (STEERING ANGLE SENSOR)
NOTE: For vehicles without enhanced VSC, go to "CHECK CAN BUS LINE FOR SHORT TO +B (SKID CONTROL ECU)".




(a) Disconnect the S13 steering angle sensor connector.
(b) Measure the resistance of the DLC3.
Standard resistance:






OK -- REPLACE STEERING ANGLE SENSOR
NG -- Continue to next step.

12. CHECK CAN BUS LINE FOR SHORT TO +B (STEERING ANGLE SENSOR BRANCH WIRE)




(a) Disconnect the J15 J/C1 connector.
(b) Measure the resistance of the wire harness side connector.
Standard resistance:





HINT: Measure the resistance with the S13 steering angle sensor connector disconnected.

NG -- REPLACE STEERING ANGLE SENSOR BRANCH WIRE AND CONNECTOR (CANH, CANL)
OK -- Continue to next step.

13. CONNECT CONNECTOR
(a) Reconnect the S13 steering angle sensor connector and J15 J/C1 connector.
NEXT -- Continue to next step.

14. CHECK CAN BUS LINE FOR SHORT TO +B (SKID CONTROL ECU)




(a) Disconnect the A8 skid control ECU connector.
(b) Measure the resistance of the DLC3.
Standard resistance:






OK -- REPLACE SKID CONTROL ECU
NG -- Continue to next step.

15. CHECK CAN BUS LINE FOR SHORT TO +B (SKID CONTROL ECU BRANCH WIRE)




(a) Disconnect the J15 J/C1 connector.
(b) Measure the resistance of the wire harness side connectors.
Standard resistance:





HINT: Measure the resistance with the S8 skid control ECU connector disconnected.

NG -- REPLACE SKID CONTROL ECU BRANCH WIRE AND CONNECTOR (CANH, CANL)
OK -- REPLACE CAN MAIN WIRE AND CONNECTOR (J/C1 - J/C2)
16. CONNECT CONNECTOR
(a) Reconnect the J18 J/C2 connector.
NEXT -- Continue to next step.

17. CHECK CAN BUS LINE FOR SHORT TO +B (ECM)




(a) Disconnect the E6 ECM connector.
(b) Measure the resistance of the DLC3.
Standard resistance:






OK -- REPLACE ECM
NG -- Continue to next step.

18. CHECK CAN BUS LINE FOR SHORT TO +B (ECM - J/C2)




(a) Disconnect the J18 J/C2 connector.
(b) Measure the resistance of the wire harness side connectors.
Standard resistance:





HINT: Measure the resistance with the E6 ECM connector disconnected.

NG -- REPLACE CAN MAIN WIRE AND CONNECTOR (ECM - J/C2)
OK -- Continue to next step.

19. CONNECT CONNECTOR
(a) Reconnect the E6 ECM connector and J18 J/C2 connector.
NEXT -- Continue to next step.

20. CHECK CAN BUS LINE FOR SHORT TO +B (YAW RATE SENSOR)
NOTE: For vehicles without enhanced VSC, go to "CHECK CAN BUS LINE FOR SHORT TO +B (HYBRID VEHICLE CONTROL ECU)".




(a) Disconnect the Y1 yaw rate sensor connector.
(b) Measure the resistance of the DLC3.
Standard resistance:






OK -- REPLACE YAW RATE SENSOR
NG -- Continue to next step.

21. CHECK CAN BUS LINE FOR SHORT TO +B (YAW RATE SENSOR BRANCH WIRE)




(a) Disconnect the J18 J/C2 connector.
(b) Measure the resistance of the wire harness side connector.
Standard resistance:





HINT: Measure the resistance with the Y1 yaw rate sensor connector disconnected.

NG -- REPLACE YAW RATE SENSOR BRANCH WIRE AND CONNECTOR
OK -- Continue to next step.

22. CONNECT CONNECTOR
(a) Reconnect the Y1 yaw rate sensor connector and J18 J/C2 connector.
NEXT -- Continue to next step.

23. CHECK CAN BUS LINE FOR SHORT TO +B (HYBRID VEHICLE CONTROL ECU)




(a) Disconnect the H14 hybrid vehicle control ECU connector.
(b) Measure the resistance of the DLC3.
Standard resistance:






OK -- REPLACE HYBRID VEHICLE CONTROL ECU
NG -- Continue to next step.

24. CHECK CAN BUS LINE FOR SHORT TO +B (HYBRID VEHICLE CONTROL ECU BRANCH WIRE)




(a) Disconnect the J18 J/C2 connector.
(b) Measure the resistance of the wire harness side connectors.
Standard resistance:





HINT: Measure the resistance with the H14 hybrid vehicle control ECU connector disconnected.

NG -- REPLACE HYBRID VEHICLE CONTROL ECU BRANCH WIRE AND CONNECTOR (CANH, CANL)
OK -- Continue to next step.

25. CONNECT CONNECTOR
(a) Reconnect the H14 hybrid vehicle control ECU connector and J18 J/C2 connector.
NEXT -- Continue to next step.

26. CHECK CAN BUS LINE FOR SHORT TO +B (GATEWAY ECU)




(a) Disconnect the G1 gateway ECU connector.
(b) Measure the resistance of the DLC3.
Standard resistance:






OK -- REPLACE GATEWAY ECU
NG -- REPLACE GATEWAY ECU BRANCH WIRE AND CONNECTOR