51-01

EPS DTC Troubleshooting: 51-01

DTC 51-01:

Torque Sensor (VT1, VT2 Low/High Voltage)

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

2. Check the ADVT1 in the EPS DATA LIST with the HDS.

Is the voltage at 1.45-4.10 V?

YES -

Go to step 3.

NO -

Go to step 4.

3. Check the ADVT2 in the EPS DATA LIST with the HDS.

Is the voltage at 1.56-4.28 V?

YES -

Check for loose terminals or poor connections. If the connections are good, the system is OK at this time.�

NO -

Go to step 4.

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

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

6. 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 7.

NO -

Go to step 11.

7. 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 8.

NO -

Go to step 13.

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





Is there continuity?

YES -

Go to step 9.

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.�

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

10. 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.�

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

12. 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.�

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. 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.�