| Symptom | Diagnostic procedure | |
|---|---|---|
| EPS indicator does not come on | Symptom Troubleshooting | |
| EPS indicator does not go off, and no DTCs are stored | Symptom Troubleshooting | |
| EPS indicator is not on, no DTCs are stored, but there is no power assist or power assist down | 1. 2. 3. | Check the motor power wires between the EPS control unit and the motor for a short to ground. Repair as needed. If the motor power wires is OK, replace the steering gearbox (short in the motor). Check the power and ground connections at the EPS control unit. |
| HDS does not communicate with the EPS control unit or the vehicle | Troubleshoot the DLC circuit: R18A1 engine model, K20Z2 engine model. | |