EPS

EPS DTC Troubleshooting: 14

DTC 14: Torque Sensor (Resistance)

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 fully to the left, and hold it in that position for 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 14 indicated?
YES - Go to step 7.

NO - Troubleshoot the indicated DTC.


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

8. Disconnect the torque sensor 3P connector and EPS control unit connector B (14P).

9. Check for continuity between torque sensor 3P connector terminals No. 1 and No. 2.

Is there continuity?
YES - Repair short between the BLU/RED and PNK wires in the torque sensor circuit between the torque sensor and the EPS control unit.

NO - Go to step 10.






10. Check for continuity between torque sensor 3P connector terminals No. 2 and No. 3.

Is there continuity?
YES - Repair short between the WHT/GRN and BLU/RED wires in the torque sensor circuit between the torque sensor and the EPS control unit.

NO - Go to step 11.






11. Check for continuity between torque sensor 3P connector terminals No. 1 and No. 3.

Is there continuity?
YES - Repair short between the WHT/GRN and PNK wires in the torque sensor circuit between the torque sensor and the EPS control unit.

NO - Go to step 12.






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

Is the resistance between 12-14 Ohms (at 68 °F, 20 °C)?
YES - Go to step 13.

NO - Replace the torque sensor.






13. Check for continuity between the appropriate EPS control unit connector B (14P) and torque sensor 3P connector terminals (see table).





Is there continuity?
YES - The EPS system is OK at this time. Check for loose terminals in the EPS control unit connectors. If necessary, substitute a known-good EPS control unit and recheck.

NO - Repair open in the appropriate torque sensor circuit between the EPS control unit and the torque sensor.