| DTC 4: | Upper FET Stuck ON |
| 1. | Clear the DTC |
| 2. | Start the engine |
| 3. | Turn the steering wheel from lock-to-lock several times, and wait 10 seconds or more. Does the EPS indicatior come on? YES - Go to 4. NO - The system is OK at this time.n |
| 4. | Stop the engine, and verify the DTC. Is DTC 4 indicated? YES - Go to 5. NO - Perform the appropriate troubleshooting for the code indicated.n |
| 5. | Disconnect EPS control unit connector C (2P). |
| 6. | Check for continuity between EPS control unit connector B (2P) terminal No. 2 and body ground. Is there continuity? YES - Check for loose wires or poor connctions at EPS control unit connectors. If necessary, substitute a known-good EPS control unit and recheck.n NO - Repair open in the wire between the EPS control unit and the body ground (G506).n |