Short to GND in CAN Bus Line
CAN COMMUNICATION SYSTEM: Short to GND in CAN Bus Line
Short to GND in CAN Bus Line
DESCRIPTION
There may be a short circuit between the CAN bus line and GND if there is continuity between terminals 6 (CANH) and 4 (CG) or terminals 14 (CANL) and 4 (CG) of the DLC3.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. CHECK CAN BUS LINE FOR SHORT TO GND (DLC3 SUB BUS LINE)
(a) Disconnect the DLC3 sub bus line connector (J54) from the CAN center J/C A side (with earth terminal).
- Before disconnecting the connector, make a note of where it is connected.
- Reconnect the connector to its original position.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- REPAIR OR REPLACE DLC3 BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L)
OK -- Continue to next step.
2. CONNECT CONNECTOR
(a) Reconnect the CAN main bus line connector (J54) to the CAN center J/C A side (with earth terminal).
NEXT -- Continue to next step.
3. CHECK CAN BUS LINE FOR SHORT TO GND (CAN BUSES TO D-CAN J/C)
(a) Disconnect the CAN main bus line connector (J27) from the CAN RH J/C B side (without earth terminal).
- Before disconnecting the connector, make a note of where it is connected.
- Reconnect the connector to its original position.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
OK -- CONNECT CONNECTOR
NG -- Continue to next step.
4. CONNECT CONNECTOR
(a) Reconnect the CAN main bus line connector (J27) to the CAN RH J/C B side (without earth terminal).
NEXT -- Continue to next step.
5. CHECK CAN BUS LINE FOR SHORT TO GND (POWER STEERING ECU SUB BUS LINE)
(a) Disconnect the power steering ECU sub bus line connector (J50) from the CAN center J/C A side (with earth terminal).
- Before disconnecting the connector, make a note of where it is connected.
- Reconnect the connector to its original position.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
OK -- CONNECT CONNECTOR
NG -- Continue to next step.
6. CONNECT CONNECTOR
(a) Reconnect the power steering ECU sub bus line connector (J50) to the CAN center J/C A side (with earth terminal).
NEXT -- Continue to next step.
7. CHECK CAN BUS LINE FOR SHORT TO GND (NETWORK GATEWAY ECU SUB BUS LINE)
(a) Disconnect the gateway ECU sub bus line connector (J53) from the CAN center J/C A side (without earth terminal).
- Before disconnecting the connector, make a note of where it is connected.
- Reconnect the connector to its original position.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
OK -- CONNECT CONNECTOR
NG -- Continue to next step.
8. CONNECT CONNECTOR
(a) Reconnect the gateway ECU sub bus line connector (J53) to the CAN center J/C A side (with earth terminal).
NEXT -- Continue to next step.
9. CHECK CAN BUS LINE FOR SHORT TO GND (STEERING SENSOR SUB BUS LINE)
(a) Disconnect the steering sensor main bus line connector (J55) from the CAN center J/C B side (without earth terminal).
- Before disconnecting the connector, make a note of where it is connected.
- Reconnect the connector to its original position.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
OK -- CONNECT CONNECTOR
NG -- Continue to next step.
10. CONNECT CONNECTOR
(a) Reconnect the steering sensor main bus line connector (J55) to the CAN center J/C B side (without earth terminal).
NEXT -- Continue to next step.
11. CHECK CAN BUS LINE FOR SHORT TO GND (DISTANCE CONTROL ECU SUB BUS LINE)
(a) Disconnect the distance control ECU sub bus line connector (J51) from the CAN center J/C B side (without earth terminal).
- Before disconnecting the connector, make a note of where it is connected.
- Reconnect the connector to its original position.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
OK -- CONNECT CONNECTOR
NG -- REPLACE JUNCTION CONNECTOR (CAN CENTER J/C)
12. CONNECT CONNECTOR
(a) Reconnect the power steering ECU sub bus line connector (J50) to the CAN center J/C A side (with earth terminal).
NEXT -- Continue to next step.
13. CHECK CAN BUS LINE FOR SHORT TO GND (POWER STEERING ECU SUB BUS LINE)
(a) Disconnect the power steering ECU connector (P41).
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
OK -- REPLACE POWER STEERING ECU
NG -- REPAIR OR REPLACE POWER STEERING ECU BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L)
14. CONNECT CONNECTOR
(a) Reconnect the gateway ECU sub bus line connector (J53) to the CAN center J/C A side (with earth terminal).
NEXT -- Continue to next step.
15. CHECK CAN BUS LINE FOR SHORT TO GND (NETWORK GATEWAY ECU SUB BUS LINE)
(a) Disconnect the gateway connector (G3).
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
OK -- REPLACE GATEWAY ECU
NG -- REPAIR OR REPLACE GATEWAY ECU SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L)
16. CONNECT CONNECTOR
(a) Reconnect the steering sensor main bus line connector (J55) to the CAN center J/C B side (without earth terminal).
NEXT -- Continue to next step.
17. CHECK CAN BUS LINE FOR SHORT TO GND (STEERING SENSOR MAIN BUS LINE)
(a) Disconnect the steering sensor connector (S10).
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
NG -- REPLACE STEERING SENSOR
OK -- REPAIR OR REPLACE STEERING SENSOR MAIN BUS LINE OR CONNECTOR (CAN-H, CAN-L)
18. CONNECT CONNECTOR
(a) Reconnect the distance control ECU sub bus line connector (J51) to the CAN center J/C B side (without earth terminal).
NEXT -- Continue to next step.
19. CHECK CAN BUS LINE FOR SHORT TO GND (DISTANCE CONTROL ECU SUB BUS LINE)
(a) Disconnect the distance control ECU connector (D2).
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
OK -- REPLACE DISTANCE CONTROL ECU
NG -- REPAIR OR REPLACE DISTANCE CONTROL ECU BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L)
20. CONNECT CONNECTOR
(a) Reconnect the CAN main bus line connector (J27) to the CAN RH J/C B side (without earth terminal).
NEXT -- Continue to next step.
21. CHECK CAN BUS LINE FOR SHORT TO GND (SKID CONTROL ECU SUB BUS LINE)
(a) Disconnect the skid control ECU sub bus line connector (J22) from the CAN RH J/C A side (with earth terminal).
- Before disconnecting the connector, make a note of where it is connected.
- Reconnect the connector to its original position.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
OK -- CONNECT CONNECTOR
NG -- Continue to next step.
22. CONNECT CONNECTOR
(a) Reconnect the skid control ECU sub bus line connector (J22) to the CAN RH J/C A side (with earth terminal).
NEXT -- Continue to next step.
23. CHECK CAN BUS LINE FOR SHORT TO GND (YAW RATE SENSOR ECU SUB BUS LINE)
(a) Disconnect the yaw rate sensor sub bus line connector (J26) from the CAN RH J/C B side (without earth terminal).
- Before disconnecting the connector, make a note of where it is connected.
- Reconnect the connector to its original position.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
OK -- CONNECT CONNECTOR
NG -- Continue to next step.
24. CONNECT CONNECTOR
(a) Reconnect the yaw rate sensor sub bus line connector (J26) to the CAN RH J/C B side (without earth terminal).
NEXT -- Continue to next step.
25. CHECK CAN BUS LINE FOR SHORT TO GND (HV CONTROL ECU SUB BUS LINE)
(a) Disconnect the HV control ECU main bus line connector (J56) from the CAN RH J/C B side (without earth terminal).
- Before disconnecting the connector, make a note of where it is connected.
- Reconnect the connector to its original position.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
OK -- CONNECT CONNECTOR
NG -- REPLACE JUNCTION CONNECTOR (CAN RH J/C)
26. CONNECT CONNECTOR
(a) Reconnect the skid control ECU sub bus line connector (J22) to the CAN RH J/C A side (with earth terminal).
NEXT -- Continue to next step.
27. CHECK CAN BUS LINE FOR SHORT TO GND (SKID CONTROL ECU SUB BUS LINE)
(a) Disconnect the skid control ECU connector (S39).
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
OK -- REPLACE SKID CONTROL ECU
NG -- REPAIR OR REPLACE SKID CONTROL ECU BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L)
28. CONNECT CONNECTOR
(a) Reconnect the yaw rate sensor sub bus line connector (J26) to the CAN RH J/C B side (without earth terminal).
NEXT -- Continue to next step.
29. CHECK CAN BUS LINE FOR SHORT TO GND (YAW RATE SENSOR SUB BUS LINE)
(a) Disconnect the yaw rate sensor connector (Y1).
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
OK -- REPLACE YAW RATE SENSOR
NG -- REPAIR OR REPLACE YAW RATE SENSOR SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L)
30. CONNECT CONNECTOR
(a) Reconnect the HV control ECU main bus line connector (J56) to the CAN RH J/C B side (without earth terminal).
NEXT -- Continue to next step.
31. CHECK CAN BUS LINE FOR SHORT TO GND (HV CONTROL ECU SUB BUS LINE)
(a) Disconnect the HV control ECU connector (H30).
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
OK -- REPLACE HV CONTROL ECU
NG -- REPAIR OR REPLACE HV CONTROL ECU MAIN BUS LINE OR CONNECTOR