DTC 4

DTC 4: Upper FET Stuck ON
1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Start the engine.
4. Turn the steering wheel from lock-to-lock several times, and wait 10 seconds or more.
Does the EPS indicator come on?
YES- Go to step 5.
NO- The system is OK at this time.
5. Stop the engine, and verify the DTC.
Is DTC 4 indicated?
YES- Go to step 6.
NO- Perform the appropriate troubleshooting for the DTC indicated.
6. Turn the ignition switch OFF, then disconnect EPS control unit connector B (2P).





7. Check for continuity between EPS control unit connector B (2P) terminal No. 2 and body ground.
Is there continuity?
YES- Check for loose terminals and poor connections at the EPS control unit. If necessary, substitute a known-good EPS control unit and recheck.
NO- Repair open in the wire between the EPS control unit and the body ground (G651).