| DTC P0118: | ECT Sensor 1 Circuit High Voltage |
| 1. | Turn the ignition switch ON (II). |
| 2. | Check ECT SENSOR 1 in the DATA LIST with the HDS. Is about -40 °C (-40 °F) or less, or 4.90 V or higher indicated? YES - Go to 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1 and the ECM.n |
| 3. | Turn the ignition switch OFF. |
| 4. | Disconnect ECT sensor 1 2P connector. |
| 5. | Connect ECT sensor 1 2P connector terminals No. 1 and No. 2 with a jumper wire.
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| 6. | Turn the ignition switch ON (II). |
| 7. | Check ECT SENSOR 1 in the DATA LIST with the HDS. Is about -40 °C (-40 °F) or less, or 4.90 V or higher indicated? YES - Go to 8. NO - Go to 20. |
| 8. | Turn the ignition switch OFF. |
| 9. | Remove the jumper wire from ECT sensor 1 2P connector. |
| 10. | Turn the ignition switch ON (II). |
| 11. | Measure voltage between ECT sensor 1 2P connector terminal No. 2 and body ground.
Is there about 5 V? YES - Go to 12. NO - Go to 16. |
| 12. | Turn the ignition switch OFF. |
| 13. | Jump the SCS line with the HDS. |
| 14. | Disconnect ECM connector B (44P). |
| 15. | Check for continuity between ECT sensor 1 2P connector terminal No. 1 and ECM connector terminal B33.
Is there continuity? YES - Go to 27. NO - Repair open in the wire between the ECM (B33) and ECT sensor 1, then go to 22. |
| 16. | Turn the ignition switch OFF. |
| 17. | Jump the SCS line with the HDS. |
| 18. | Disconnect ECM connector B (44P). |
| 19. | Check for continuity between ECT sensor 1 2P connector terminal No. 2 and ECM connector terminal B23.
Is there continuity? YES - Go to 27. NO - Repair open in the wire between the ECM (B23) and ECT sensor 1, then go to 22. |
| 20. | Turn the ignition switch OFF. |
| 21. | Replace ECT sensor 1. |
| 22. | Reconnect all connectors and the battery. |
| 23. | Turn the ignition switch ON (II). |
| 24. | Reset the ECM with the HDS. |
| 25. | Do the ECM idle learn procedure. |
| 26. | Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0118 is indicated, check for poor connections or loose terminals at ECT sensor 1 and the ECM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - Troubleshooting is complete.n |
| 27. | Update the ECM if it does not have the latest software, or substitute a known-good ECM. |
| 28. | Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0118 is indicated, check for poor connections or loose terminals at ECT sensor 1 and the ECM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO - If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM.n |