DTC Troubleshooting: 61-04

DTC 61-04:  Motor Harness Open/Short (Diagnosis when steering wheel turning)

1.Clear the DTC using the HDS.

2.Turn the ignition switch OFF.

3.Start the engine.

4.Turn the steering wheel to right or left, and wait 10 seconds or more.

Does the EPS indicator come on?


YES - Go to 5.


NO - Check for loose terminals or poor connections. If the connections are good, the system is OK at this time.n


5.Verify the DTC.

Is DTC 61-04 indicated?


YES - Go to 6.


NO - Perform the appropriate troubleshooting for the code indicated.n


6.Turn the ignition switch OFF.

7.Disconnect the EPS control unit connector B (2P) and connector C (2P).

8.Check for continuity between the following terminals of the EPS control unit connector B (2P) and connector C (2P).

 

Is there continuity?


YES - Go to 9.


NO - Go to 12.

9.Check for continuity between body ground and the EPS control unit connector B (2P) No. 1 terminal, connector C (2P) No. 1 terminal, connector C (2P) No. 2 terminal individually.

 

 

Is there continuity?


YES - Go to 10.


NO - Check for loose terminals in the EPS control unit connectors, and repair if necessary. If no poor connections are found, replace the EPS control unit.


10.Disconnect the motor 1P connector and motor 2P connector.

11.Check for continuity between body ground and the EPS control unit connector B (2P) No. 1 terminal, connector C (2P) No. 1 terminal, connector C (2P) No. 2 terminal individually.

 

 

Is there continuity?


YES - Repair short to body ground in the wire harness between the EPS control unit and motor.n


NO - Short to the body ground in the motor wire harness, or motor internal circuit, replace the motor: LHD type, RHD type.n

12.Disconnect the motor 1P connector and motor 2P connector.

13.Check for continuity between the following terminals of the motor 1P and motor 2P connector.

 

Is there continuity?


YES - Repair open in the wire harness between the EPS control unit and motor.n


NO - Open in the motor wire harness, or motor internal circuit, replace the motor: LHD type, RHD type.n