52-02

EPS DTC Troubleshooting: 52-02

DTC 52-02: Torque Sensor Power Supply (Initial 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. Check for DTCs with the HDS.

Is DTC 52-02 indicated?
YES - Go to step 6.

NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the EPS control unit.


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

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

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

9. Measure the voltage between body ground and EPS control unit connector B (16P) terminal No. 5.

Is there 5.5 V or more?
YES - Repair short to power in the wire harness between the EPS control unit and the torque sensor.

NO - Go to step 10.






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

11. Start the engine.

12. Check for DTCs with the HDS.

Is DTC 52-02 indicated?
YES - The fault is an open or short in the torque sensor internal circuit. Replace the steering gearbox. Steering Gearbox Removal and Installation

NO - Replace the original EPS control unit. Service and Repair