| DTC 51-02: | Torque Sensor (VT3 Differential-amplification Function) (Regular diagnosis) |
| DTC 51-06: | Torque Sensor (VT1, VT2 Average) (Regular diagnosis) |
| 1. | Clear the DTC using the HDS. |
| 2. | Turn the ignition switch OFF. |
| 3. | Start the engine. Does the EPS indicator come on? YES - Go to 4. NO - Check for loose terminals or poor connections. If the connections are good, the system is OK at this time.n |
| 4. | Verify the DTC. Is DTC 51-02, 51-03, 51-06 or 51-07 indicated? YES - Go to 5. NO - Perform the appropriate troubleshooting for the code indicated.n |
| 5. | Turn the ignition switch OFF. |
| 6. | Disconnect the EPS control unit connector D (28P). |
| 7. | Check for resistance between EPS control unit connector D (28P) terminals No. 9 and No. 10.
Is the resistance between 12-15 W? YES - Go to 8. NO - Go to 12. |
| 8. | Check for resistance between EPS control unit connector D (28P) terminals No. 8 and No. 9.
Is the resistance between 12-15 W? YES - Go to 9. NO - Go to 14. |
| 9. | Check for continuity between EPS control unit connector D (28P) terminals No. 9 and body ground.
Is there continuity? YES - Go to 10. NO - Check for loose terminals in the EPS control unit connectors, and repair if necessary. If no poor connections are found, replace the EPS control unit.n |
| 10. | Disconnect the torque sensor 3P connector from the steering gearbox. |
| 11. | Check for continuity between torque sensor 3P connector terminals No. 2 and body ground.
Is there continuity? YES - Repair short to ground in the wire between the torque sensor and EPS control unit.n NO - Faulty torque sensor (short in the sensor internal circuit), replace the steering gearbox.n |
| 12. | Disconnect the torque sensor 3P connector from the steering gearbox. |
| 13. | On the sensor side, check for resistance between torque sensor terminals No. 1 and No. 2.
Is the resistance between 12-15 W? YES - Repair open or short between the PNK and BLU/RED wires in the torque sensor circuit between torque sensor and EPS control unit.n NO - Faulty torque sensor (short or open in the internal circuit), replace the steering gearbox.n |
| 14. | Disconnect the torque sensor 3P connector from the steering gearbox. |
| 15. | On the sensor side, check for resistance between torque sensor terminals No. 2 and No. 3.
Is the resistance between 12-15 W? YES - Repair open or short between the BLU/RED and WHT/GRN wires in the torque sensor circuit between torque sensor and EPS control unit.n NO - Faulty torque sensor (short or open in the internal circuit), replace the steering gearbox.n |