DTC Troubleshooting: 17, 18

DTC 17:  Torque Sensor Vcc1
  
  

1.Clear the DTC.

2.Start the engine.

3.Wait at least 10 seconds.

Does the EPS indicator 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 17 or DTC 18 indicated?


YES - Go to 5.


NO - Do the troubleshooting for the DTC indicated.n


5.Make sure the ignition switch is OFF, then disconnect EPS control unit connector B (14P) and the torque sensor 7P connector.

6.Check for continuity between EPS control unit connector B (14P) terminal No. 1 and body ground.

 

Is there continuity?


YES - Repair short to body ground in the wire between the torque sensor and EPS control unit.n


NO - Go to 7.

7.Check for continuity between EPS control unit connector B (14P) terminal No. 1 and the torque sensor 7P connector terminal No. 2 (RHD: No. 6).

 

Is there continuity?


YES - Go to 8.


NO - Repair open in the wire between the torque sensor and EPS control unit.n


8.Check for continuity between EPS control unit connector B (14P) terminal No. 2 and body ground.

 

Is there continuity?


YES - Repair short to body ground in the wire between the torque sensor and EPS control unit.n


NO - Go to 9.

9.Check for continuity between EPS control unit connector B (14P) terminal No. 2 and the torque sensor 7P connector terminal No. 6 (RHD: No. 2).

 

Is there continuity?


YES - Go to 10.


NO - Repair open in the wire between the torque sensor and EPS control unit.n


10.Substitute a known-good EPS control unit, and connect all the disconnected connectors.

11.Start the engine.

Does the EPS indicator come on?


YES - Go to 12.


NO - Check for loose EPS control unit connectors. If necessary, replace the  EPS control unit and recheck.n


12.Stop the engine, and verify the DTC.

Is DTC 17 or DTC 18 indicated?


YES - Check for loose torque sensor connectors. If necessary, substitute a known-good steering gearbox and recheck.n


NO - Perform the appropriate troubleshooting for the code indicated.n