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DTC P0118: ECT Sensor Circuit High Voltage Honda Element I

Testing & Diagnostics 5 illustrations ~529 words

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

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Scheme 68: DTC P0118: ECT Sensor Circuit High Voltage
Scheme 68: DTC P0118: ECT Sensor Circuit High Voltage

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Scheme 69

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Scheme 72
  1. Turn the ignition switch ON (II).
  2. Check the ECT SENSOR in the DATA LIST with the HDS. Is about -40°F (-40°C) or less, or 4.90 V or more indicated? YES- Go to step 3 . NO- Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the ECT sensor and the ECM/PCM.
  3. Turn the ignition switch OFF.
  4. Disconnect the ECT sensor 2P connector.
  5. Connect ECT sensor 2P connector terminals No. 1 and No. 2 with a jumper wire.
  6. Turn the ignition switch ON (II).
  7. Check the ECT SENSOR in the DATA LIST with the HDS. Is about -40°F (-40°C) or less, or 4.90 V or more indicated? YES- Go to step 8 . NO- Go to step 18 .
  8. Turn the ignition switch OFF.
  9. Remove the jumper wire.
  10. Turn the ignition switch ON (II).
  11. Measure voltage between ECT sensor 2P connector terminal No. 1 and body ground. Is there about 5 V? YES- Go to step 12 . NO- Go to step 17 .
  12. Turn the ignition switch OFF.
  13. Jump the SCS line with the HDS.
  14. Disconnect ECM/PCM connector A (31P).
  15. Connect ECT sensor 2P connector terminal No. 2 to body ground with a jumper wire.
  16. Check for continuity between ECM/PCM connector terminal A23 and body ground. Is there continuity? YES- Go to step 25 . NO- Repair open in the wire between the ECM/PCM (A23) and the ECT sensor, then go to step 20 .
  17. Measure voltage between ECM/PCM connector terminal B8 and body ground. Is there about 5 V? YES- Repair open in the wire between the ECM/PCM (B8) and the ECT sensor, then go to step 20 . NO- Go to step 25 .
  18. Turn the ignition switch OFF.
  19. Replace the ECT sensor (see «ECT SENSOR REPLACEMENT»(ref-220570-S34870321162006022000000) ).
  20. Reconnect all connectors.
  21. Turn the ignition switch ON (II).
  22. Reset the ECM/PCM with the HDS.
  23. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(ref-220572-S08440202922006022000000) ).
  24. 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 the ECT sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO- Troubleshooting is complete.
  25. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-220569-S23624043112006022000000) ).
  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 the ECT sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting. NO- If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «MAP SENSOR REPLACEMENT»(ref-220570-S17955277902006022000000) ).

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