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DTC P2184: ECT Sensor 2 Circuit Low Voltage Honda Fit I

Testing & Diagnostics 1 illustration ~431 words

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

Scheme 218

Scheme 218: DTC P2184: ECT Sensor 2 Circuit Low Voltage
Scheme 218: DTC P2184: ECT Sensor 2 Circuit Low Voltage
  1. Turn the ignition switch ON (II).
  2. Check ECT SENSOR 2 in the DATA LIST with the HDS. Is about 356°F (180°C) or more, or 0.08 V or less indicated? YES - Go to step 3 . NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at ECT sensor 2 and the ECM/PCM.
  3. Turn the ignition switch OFF.
  4. Disconnect the ECT sensor 2 2P connector.
  5. Turn the ignition switch ON (II).
  6. Check ECT SENSOR 2 in the DATA LIST with the HDS. Is about 356°F (180°C) or more, or 0.08 V or less indicated? YES - Go to step 7 . NO - Go to step 11 .
  7. Turn the ignition switch OFF.
  8. Jump the SCS line with the HDS.
  9. Disconnect ECM/PCM connector E (31P).
  10. Check for continuity between ECT sensor 2 2P connector terminal No. 2 and body ground. Is there continuity? YES - Repair short in the wire between ECT sensor 2 and the ECM/PCM (E1), then go to step 13 . NO - Go to step 18 .
  11. Turn the ignition switch OFF.
  12. Replace ECT sensor 2 (see «ECT SENSOR 2 REPLACEMENT»(ref-291411-S41747978832008072800000) ).
  13. Reconnect all connectors.
  14. Turn the ignition switch ON (II).
  15. Reset the ECM/PCM with the HDS.
  16. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(ref-291413-S23447131872008072800000) ).
  17. Check for Temporary DTCs or DTCs with the HDS. Is DTC P2184 indicated? YES - Check for poor connections or loose terminals at ECT sensor 2 and the ECM/PCM, then go to step 1 . NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.
  18. Reconnect all connectors.
  19. Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(ref-291410-S41633658632008072800000) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-291410-S09944723422008072800000) ).
  20. Check for Temporary DTCs or DTCs with the HDS. Is DTC P2184 indicated? YES - Check for poor connections or loose terminals at ECT sensor 2 and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-291410-S09944723422008072800000) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO - If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(ref-291411-S17209936142008072800000) ). If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.

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