71-04

EPS DTC Troubleshooting: 71-04

DTC 71-04:

Motor Angle Sensor (Check Signals)

1. Turn the ignition switch to ON (II).

2. Clear the DTC with the HDS.

3. Turn the ignition switch to LOCK (0).

4. Start the engine.

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

6. Check for DTCs with the HDS.

Is DTC 71-04 indicated?

YES -

Go to step 7.

NO -

Intermittent failure, the system is OK at this time.

7. Turn the ignition switch to LOCK (0).

8. Disconnect EPS control unit connectors B (16P) Service and Repair.

9. Measure the resistance between EPS control unit connector B (16P) terminals No. 7 and No. 9.





Is the resistance between 13.5-17.5 Ohms?

YES -

Go to step 10.

NO -

Go to step 13.

10. Check for continuity between body ground and EPS control unit connector B (16P) terminals No. 7 and No. 9 individually.





Is there continuity?

YES -

Go to step 11.

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 Service and Repair.

11. Disconnect the EPS motor angle sensor 8P connector.

12. On the sensor side, check for continuity between body ground and the EPS motor angle sensor 8P connector terminals No. 1 and No. 5 individually.





Is there continuity?

YES -

Replace the EPS motor Service and Repair.

NO -

Repair a short to body ground in the wire between the EPS motor angle sensor 8P connector and the EPS control unit.

13. Disconnect the EPS motor angle sensor 8P connector.

14. On the sensor side, measure the resistance between the EPS motor angle sensor 8P connector terminals No. 1 and No. 5.





Is the resistance between 13.5-17.5 Ohms?

YES -

Repair an open or short in the wire between the EPS control unit and the EPS motor angle sensor.

NO -

Replace the EPS motor Service and Repair.