52-04

EPS DTC Troubleshooting: 52-01, 52-03, 52-04, 52-05

DTC 52-01:

Torque Sensor Allowable Tolerance (Initial Diagnosis)

DTC 52-03:

Main Torque Sensor

DTC 52-04:

Sub Torque Sensor

DTC 52-05:

Torque Sensor Allowable Tolerance

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. Check for DTCs with the HDS.

Is DTC 52-01, 52-03, 52-04, or 52-05 indicated?

YES -

Go to step 6.

NO -

Intermittent failure, the system is OK at this time.

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

7. Disconnect EPS control unit connector B (16P) Service and Repair.

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

9. Measure the voltage between body ground and EPS control unit connector B (16P) terminals No. 1,No. 2,No. 3,No. 4, and No. 5 individually.





Is there battery voltage?

YES -

Repair a short to power in the wire harness between the EPS control unit and the torque sensor.

NO -

Go to step 10.

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

11. Check for continuity between body ground and EPS control unit connector B (16P) terminals No. 1,No. 2,No. 3,No. 4, and No. 5 individually.





Is there continuity?

YES -

Go to step 12.

NO -

Go to step 14.

12. Disconnect the torque sensor 6P connector.

13. Check for continuity between body ground and EPS control unit connector B (16P) terminals No. 1,No. 2,No. 3,No. 4, and No. 5 individually.





Is there continuity?

YES -

Repair a short to body ground in the wire between the EPS control unit and the torque sensor.

NO -

Replace the steering gearbox Steering Gearbox Removal/Installation.

14. Disconnect the torque sensor 6P connector.

15. Check for continuity between EPS control unit connector B (16P) terminals and torque sensor 6P connector terminals (see table).









Is there continuity?

YES -

Go to step 16.

NO -

Repair an open in the wire between the EPS control unit and the torque sensor.

16. Substitute a known-good EPS control unit Service and Repair.

17. Reconnect all the connectors.

18. Start the engine.

19. Check for DTCs with the HDS.

Is DTC 52-01, 52-03, 52-04, or 52-05 indicated?

YES -

Replace the steering gearbox Steering Gearbox Removal/Installation.

NO -

Replace the original EPS control unit Service and Repair.