Short to GND in CAN Bus Line

CAN COMMUNICATION: 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 when the resistance between terminals 6 (CANH) and 4 (CG) or terminals 14 (CANL) and 4 (CG) of the DLC3 is below 200 Ohms.





*: for 4WD

WIRING DIAGRAM









INSPECTION PROCEDURE

NOTICE:
* Turn the ignition switch off before measuring the resistance of the main wire and the branch wire.
* After the ignition switch is turned off, check that the key reminder warning system and light reminder buzzer are not in operation.
* Before measuring the resistance, leave the vehicle for at least 1 minute and do not operate the ignition switch, any switches or doors. If doors need to be opened in order to check connectors, open the doors and leave them open.

HINT
Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

PROCEDURE

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistance of the main wire and the branch wire.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

NEXT -- Continue to next step.

2. CHECK FOR SHORT TO GND IN CAN BUS WIRE (DLC3 BRANCH WIRE)

(a) Disconnect the E68*1 or E96*2 No. 2 junction connector connector.

*1: for TMMC Made

*2: for TMC Made





(b) Measure the resistance of the DLC3.

Standard Resistance:





NG -- REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DLC3 (CANH, CANL)
OK -- Continue to next step.

3. CONNECT CONNECTOR

(a) Reconnect the E68*1 or E96*2 No. 2 junction connector connector.

*1: for TMMC Made

*2: for TMC Made

NEXT -- Continue to next step.

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

(a) Disconnect the A36*1 or A44*2 No. 1 junction connector connector.

*1: for TMMC Made

*2: for TMC Made





(b) Measure the resistance of the DLC3.

Standard Resistance:





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

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

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





Standard Resistance:

for TMMC Made





for TMC Made





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

6. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 1 JUNCTION CONNECTOR - BRAKE ACTUATOR ASSEMBLY)

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





Standard Resistance:

for TMMC Made





for TMC Made





NG -- CONNECT CONNECTOR

OK -- REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 1 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)

7. CONNECT CONNECTOR

(a) Reconnect the A36*1 or A44*2 No. 1 junction connector connector.

*1: for TMMC Made

*2: for TMC Made

NEXT -- Continue to next step.

8. CHECK FOR SHORT TO GND IN CAN BUS WIRE (ECM)

(a) Disconnect the A9 ECM connector.





(b) Measure the resistance of the DLC3.

Standard Resistance:





Result





C -- REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (NO. 1 JUNCTION CONNECTOR - ECM)

B -- REPLACE ECM Removal

A -- REPLACE ECM Removal

9. CONNECT CONNECTOR

(a) Reconnect the A36*1 or A44*2 No. 1 junction connector connector.

*1: for TMMC Made

*2: for TMC Made

NEXT -- Continue to next step.

10. CHECK FOR SHORT TO GND IN CAN BUS WIRE (BRAKE ACTUATOR ASSEMBLY)

(a) Disconnect the A19 brake actuator assembly (skid control ECU) connector.





(b) Measure the resistance of the DLC3.

Standard Resistance:





NG -- REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO BRAKE ACTUATOR ASSEMBLY (CANH, CANL)

OK -- REPLACE BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) Removal

11. CONNECT CONNECTOR

(a) Reconnect the A36*1 or A44*2 No. 1 junction connector connector.

*1: for TMMC Made

*2: for TMC Made

NEXT -- Continue to next step.

12. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR, NO. 4 JUNCTION CONNECTOR SIDE)

(a) Disconnect the E70*1 or E97*2 No. 3 junction connector connector.

*1: for TMMC Made

*2: for TMC Made





(b) Measure the resistance of the DLC3.

Standard Resistance:





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

13. CONNECT CONNECTOR

(a) Reconnect the E70*1 or E97*2 No. 3 junction connector connector.

*1: for TMMC Made

*2: for TMC Made

NEXT -- Continue to next step.

14. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 4 JUNCTION CONNECTOR SIDE)

(a) Disconnect the E69 No. 4 junction connector connector.





(b) Measure the resistance of the DLC3.

Standard Resistance:





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

15. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 4 JUNCTION CONNECTOR - 4WD CONTROL ECU ASSEMBLY)

NOTICE:
For vehicles without 4WD, go to "Check for Short to GND in CAN Bus Wire (No. 4 Junction Connector - Combination Meter Assembly)".

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





Standard Resistance:





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

16. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 4 JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)

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





Standard Resistance:





NG -- CONNECT CONNECTOR

OK -- REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 4 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)

17. CONNECT CONNECTOR

(a) Reconnect the E69 No. 4 junction connector connector.

NEXT -- Continue to next step.

18. CHECK FOR SHORT TO GND IN CAN BUS WIRE (4WD CONTROL ECU ASSEMBLY)

(a) Disconnect the E57 4WD control ECU assembly connector.





(b) Measure the resistance of the DLC3.

Standard Resistance:





NG -- REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO 4WD CONTROL ECU ASSEMBLY (CANH, CANL)

OK -- REPLACE 4WD CONTROL ECU ASSEMBLY

19. CONNECT CONNECTOR

(a) Reconnect the E69 No. 4 junction connector connector.

NEXT -- Continue to next step.

20. CHECK FOR SHORT TO GND IN CAN BUS WIRE (COMBINATION METER ASSEMBLY)

(a) Disconnect the E19 combination meter assembly (combination meter ECU) connector.





(b) Measure the resistance of the DLC3.

Standard Resistance:





NG -- REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO COMBINATION METER ASSEMBLY (CANH, CANL)

OK -- REPLACE COMBINATION METER ASSEMBLY Removal

21. CONNECT CONNECTOR

(a) Reconnect the E70*1 or E97*2 No. 3 junction connector connector.

*1: for TMMC Made

*2: for TMC Made

NEXT -- Continue to next step.

22. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - YAW RATE SENSOR ASSEMBLY)

(a) Disconnect the E68*1 or E96*2 No. 2 junction connector connector.

*1: for TMMC Made

*2: for TMC Made





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

Standard Resistance:

for TMMC Made





for TMC Made





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

23. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - POWER STEERING ECU ASSEMBLY)

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





Standard Resistance:

for TMMC Made





for TMC Made





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

24. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - MAIN BODY ECU)

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





Standard Resistance:

for TMMC Made





for TMC Made





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

25. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)

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





Standard Resistance:

for TMMC Made





for TMC Made





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

26. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 2 JUNCTION CONNECTOR - STEERING ANGLE SENSOR)

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





Standard Resistance:

for TMMC Made





for TMC Made





NG -- CONNECT CONNECTOR

OK -- REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 2 JUNCTION CONNECTOR - NO. 3 JUNCTION CONNECTOR)

27. CONNECT CONNECTOR

(a) Reconnect the E68*1 or E96*2 No. 2 junction connector connector.

*1: for TMMC Made

*2: for TMC Made

NEXT -- Continue to next step.

28. CHECK FOR SHORT TO GND IN CAN BUS WIRE (YAW RATE SENSOR ASSEMBLY)

(a) Disconnect the K6 yaw rate sensor assembly connector.





(b) Measure the resistance of the DLC3.

Standard Resistance:





NG -- REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO YAW RATE SENSOR ASSEMBLY (CANH, CANL)

OK -- REPLACE YAW RATE SENSOR ASSEMBLY Removal

29. CONNECT CONNECTOR

(a) Reconnect the E68*1 or E96*2 No. 2 junction connector connector.

*1: for TMMC Made

*2: for TMC Made

NEXT -- Continue to next step.

30. CHECK FOR SHORT TO GND IN CAN BUS WIRE (POWER STEERING ECU ASSEMBLY)

(a) Disconnect the E18 power steering ECU assembly connector.





(b) Measure the resistance of the DLC3.

Standard Resistance:





NG -- REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO POWER STEERING ECU ASSEMBLY (CANH, CANL)

OK -- REPLACE POWER STEERING ECU ASSEMBLY Removal

31. CONNECT CONNECTOR

(a) Reconnect the E68*1 or E96*2 No. 2 junction connector connector.

*1: for TMMC Made

*2: for TMC Made

NEXT -- Continue to next step.

32. CHECK FOR SHORT TO GND IN CAN BUS WIRE (MAIN BODY ECU)

(a) Disconnect the E17 main body ECU (driver side junction block) connector.





(b) Measure the resistance of the DLC3.

Standard Resistance:





NG -- REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO MAIN BODY ECU (CANH, CANL)

OK -- REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK)

33. CONNECT CONNECTOR

(a) Reconnect the E68*1 or E96*2 No. 2 junction connector connector.

*1: for TMMC Made

*2: for TMC Made

NEXT -- Continue to next step.

34. CHECK FOR SHORT TO GND IN CAN BUS WIRE (AIR CONDITIONING AMPLIFIER ASSEMBLY)

(a) Disconnect the E37*1 or E36*2 air conditioning amplifier assembly connector.





*1: for Automatic Air Conditioning System

*2: for Manual Air Conditioning System

(b) Measure the resistance of the DLC3.

Standard Resistance:





NG -- REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO AIR CONDITIONING AMPLIFIER ASSEMBLY (CANH, CANL)

OK -- REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY Removal

35. CONNECT CONNECTOR

(a) Reconnect the E68*1 or E96*2 No. 2 junction connector connector.

*1: for TMMC Made

*2: for TMC Made

NEXT -- Continue to next step.

36. CHECK FOR SHORT TO GND IN CAN BUS WIRE (STEERING ANGLE SENSOR)

(a) Disconnect the E11 steering angle sensor connector.





(b) Measure the resistance of the DLC3.

Standard Resistance:





NG -- REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO STEERING ANGLE SENSOR (CANH, CANL)

OK -- REPLACE STEERING ANGLE SENSOR Removal

37. CONNECT CONNECTOR

(a) Reconnect the E69 No. 4 junction connector connector.

NEXT -- Continue to next step.

38. CHECK FOR SHORT TO GND IN CAN BUS WIRE (NO. 3 JUNCTION CONNECTOR - CENTER AIRBAG SENSOR ASSEMBLY)

(a) Disconnect the E70*1 or E97*2 No. 3 junction connector connector.

*1: for TMMC Made

*2: for TMC Made





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

Standard Resistance:

for TMMC Made





for TMC Made





NG -- CONNECT CONNECTOR

OK -- REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 3 JUNCTION CONNECTOR - NO. 4 JUNCTION CONNECTOR)

39. CONNECT CONNECTOR

(a) Reconnect the E70*1 or E97*2 No. 3 junction connector connector.

*1: for TMMC Made

*2: for TMC Made

NEXT -- Continue to next step.

40. CHECK FOR SHORT TO GND IN CAN BUS WIRE (CENTER AIRBAG SENSOR ASSEMBLY)

(a) Disconnect the E45 center airbag sensor assembly connector.





(b) Measure the resistance of the DLC3.

Standard Resistance:





NG -- REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO CENTER AIRBAG SENSOR ASSEMBLY (CANH, CANL)

OK -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal