DTC 18
DTC 18: Torque Sensor Vcc21. Clear the DTC.
2. Start the engine.
3. Wait at least 10 seconds.
Does the EPS indicator come on?
YES-Go to step 4.
NO-Check for loose wires or poor connections. If the connections are good, the system is OK at this timed
4. Stop the engine, and verify the DTC.
Is DTC 17 or DTC 18 indicated?
YES-Go to step 5.
NO-Do the troubleshooting for the DTC indicated.
5. Make sure the ignition switch is OFF, then disconnect EPS control unit connector C (20P) and the torque sensor 6P connector.
6. Check for continuity between EPS control unit connector C (20P) terminal No. 3 and body ground.
Is there continuity?
YES-Repair short to body ground in the wire between the torque sensor and EPS control unit.
NO-Go to step 7.
7. Check for continuity between EPS control unit connector C (20P) terminal No. 3 and the torque sensor 6P connector terminal No. 2.
Is there continuity?
YES-Go to step 8.
NO-Repair open in the wire between the torque sensor and EPS control unit.
8. Check for continuity between EPS control unit connector C (20P) terminal No. 11 and body ground.
Is there continuity?
YES-Repair short to body ground in the wire between the torque sensor and EPS control unit.
NO-Go to step 9.
9. Check for continuity between EPS control unit connector C (20P) terminal No. 11 and the torque sensor 6P connector terminal No. 3.
Is there continuity?
YES-Go to step 10.
NO-Repair open in the wire between the torque sensor and EPS control unit.
10. Check for loose or poor connections at the EPS control unit and the torque sensor connectors. If the connections are good, substitute a known-good EPS control unit and reconnect all the disconnected connectors.
11. Start the engine.
Does the EPS indicator come on?
YES-Go to step 12.
NO-Replace the EPS control unit.
12. Stop the engine, and verify the DTC.
Is DTC 17 or DTC 18 indicated?
YES-Replace the steering gearbox and recheck.
NO-Perform the appropriate troubleshooting for the code indicated.