DTC 71-04

DTC 71-04: EPS Motor Angle Sensor (Check Signals) (Regular Diagnosis)

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.

Does the EPS, indicator come on?

YES - Go to step 6.

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

6. Check for DTCs with the HDS.

Is DTC 71-04 indicated?

YES - Go to step 7.

NO - Troubleshoot the indicated DTC. If there are no DTCs, the system is OK at this time.

7. Turn the ignition switch to LOCK (0).
8. Disconnect EPS control unit connector D (28P).
9. Measure the resistance between the EPS control unit connector D (28P) terminal No. 13 and No. 27.





Is the resistance between 13 - 25 ohms?

YES - Go to step 10.

NO - Go to step 13.

10. Check for continuity between body ground and the EPS control unit connector D (28P) No. 13 terminal and the No. 27 terminal 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.

11. Disconnect the EPS motor angle sensor 6P connector.
12. Check for continuity between body ground and EPS motor angle sensor 6P connector No. 2 terminal and the No. 5 terminal individually.





Is there continuity?

YES - Faulty EPS motor angle sensor (Internal failure), or short to body ground in the wire (sensor side), replace the EPS motor.

NO - Repair short to body ground in the wire between the EPS motor angle sensor 6P connector and the EPS control unit.

13. Disconnect the EPS motor angle sensor 6P connector.
14. Measure the resistance between the EPS motor angle sensor 6P connector terminals No. 2 and No. 5.





Is the resistance between 13 - 25 ohms?

YES - Open, or short to body ground in the wire between the EPS motor angle sensor 6P connector and EPS control unit.

NO - Faulty EPS motor angle sensor (internal failure), or short to body ground in the wire (sensor side), replace the EPS motor.