DTC 12

DTC 12: Torque Sensor T/SIG
1. 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 - The system is OK at this time.
4. Stop the engine, and verify the DTC.
Is DTC 12 indicated?
YES - Go to step 5.
NO - Perform the appropriate troubleshooting for the code 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. 15 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. Turn the ignition switch ON (II).





8. Measure the voltage between EPS control unit connector C (20P) terminal No. 15 and body ground.
Is there battery voltage?
YES - Repair short to power in the + circuit wire between the torque sensor and EPS control unit.
NO - Go to step 9.
9. Turn the ignition switch OFF.





10. Check for continuity between EPS control unit connector C (20P) terminal No. 15 and the torque sensor 6P connector terminal No. 4.
Is there continuity?
YES - Go to step 11.
NO - Repair open in the wire between the torque sensor and the EPS control unit.
11. Check for loose wires or poor connections at EPS control unit connector C (20P), then substitute a known-good EPS control unit. Reconnect the disconnected connectors.
12. Start the engine.
Does the EPS indicator come on?
YES - Go to step 13.
NO - Replace the EPS control unit and rechecks
13. Stop the engine, and verify the DTC.
Is DTC 12 indicated?
YES - Check for loose wires or poor connections at the torque sensor connectors. If necessary, substitute a known-good steering gearbox and recheck.
NO - Perform the appropriate troubleshooting for the code indicated.