51-07

EPS DTC Troubleshooting: 51-02, 51-03, 51-06, 51-07

DTC 51-02:

Torque Sensor (VT3 Differential-Amplification Function)

DTC 51-03:

Torque Sensor (VT1, VT2 Rapid Change)

DTC 51-06:

Torque Sensor (VT1, VT2 Average)

DTC 51-07:

Torque Sensor (VT1, VT2 Check)

1. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

2. Clear the DTC with the HDS

3. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

4. Start the engine.

5. Check for DTCs with the HDS.

Is DTC 51-02, 51-03, 51-06, or 51-07 indicated?

YES -

Go to step 6.

NO -

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

6. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

7. Disconnect EPS control unit connector D (28P).

8. Measure the resistance between EPS control unit connector D (28P) terminals No. 9 and No. 10.





Is the resistance between 12-15 Ohms?

YES -

Go to step 9.

NO -

Go to step 13.

9. Measure the resistance between EPS control unit connector D (28P) terminals No. 8 and No. 9.





Is the resistance between 12-15 Ohms?

YES -

Go to step 10.

NO -

Go to step 15.

10. Check for continuity between EPS control unit connector D (28P) terminal No. 9 and body ground.





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 torque sensor 3P connector from the steering gearbox.

12. Check for continuity between EPS control unit connector D (28P) terminal No. 9 and body ground.





Is there continuity?

YES -

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

NO -

Replace the steering gearbox Steering Gearbox Removal/Installation.�

13. Disconnect the torque sensor 3P connector from the steering gearbox.

14. On the sensor side, measure the resistance between torque sensor 3P connector terminals No. 1 and No. 2.





Is the resistance between 12-15 Ohms?

YES -

Repair an open or a short between the PNK and the BLU wires in the torque sensor circuit between the torque sensor and the EPS control unit.�

NO -

Replace the steering gearbox Steering Gearbox Removal/Installation.�

15. Disconnect the torque sensor 3P connector from the steering gearbox.

16. On the sensor side, measure the resistance between torque sensor 3P connector terminals No. 2 and No. 3.





Is the resistance between 12-15 Ohms?

YES -

Repair an open or a short between the BLU and the PUR wires in the torque sensor circuit between the torque sensor and the EPS control unit.�

NO -

Replace the steering gearbox Steering Gearbox Removal/Installation.�