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DTC P2185: ECT Sensor 2 Circuit High Voltage Honda Ridgeline I

Testing & Diagnostics 4 illustrations ~574 words

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

Scheme 174

Scheme 174: DTC P2185: ECT Sensor 2 Circuit High Voltage
Scheme 174: DTC P2185: ECT Sensor 2 Circuit High Voltage

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Scheme 177
Scheme 177
  1. Turn the ignition switch ON (II).
  2. Check ECT SENSOR 2 in the DATA LIST with the HDS. Is about -40°F(-40°C) or less, or 4.92 V or more 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 PCM.
  3. Turn the ignition switch OFF.
  4. Disconnect the ECT sensor 2 2P connector.
  5. Connect ECT sensor 2 2P connector terminals No. 1 and No. 2 with a jumper wire.
  6. Turn the ignition switch ON (II).
  7. Check ECT SENSOR 2 in the DATA LIST with the HDS. Is about -40°F (-40°C) or less, or 4.92 V or more indicated? YES - Go to step 8. NO - Go to step 20 .
  8. Turn the ignition switch OFF.
  9. Remove the jumper wire from the ECT sensor 2 2P connector.
  10. Turn the ignition switch ON (II).
  11. Measure voltage between ECT sensor 2 2P connector terminal No. 1 and body ground. Is there about 5 V? YES - Go to step 12. NO - Go to step 16 .
  12. Turn the ignition switch OFF.
  13. Jump the SCS line with the HDS.
  14. Disconnect PCM connector C (44P).
  15. Check for continuity between PCM connector terminal C14 and ECT sensor 2 2P connector terminal No. 2. Is there continuity? YES - Go to step 27 . NO - Repair open in the wire between the PCM (C14) and ECT sensor 2, then go to step 22 .
  16. Turn the ignition switch OFF.
  17. Jump the SCS line with the HDS.
  18. Disconnect PCM connector C (44P).
  19. Check for continuity between PCM connector terminal C36 and ECT sensor 2 2P connector terminal No. 1. Is there continuity? YES - Go to step 27 . NO - Repair open in the wire between the PCM (C36) and ECT sensor 2, then go to step 22 .
  20. Turn the ignition switch OFF.
  21. Replace ECT sensor 2 (see «ECT SENSOR 2 REPLACEMENT»(ref-299652-S05094612912008092500000) ).
  22. Reconnect all connectors.
  23. Turn the ignition switch ON (II).
  24. Reset the PCM with the HDS.
  25. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-219960-S21279730262006021600000) ).
  26. Check for Temporary DTCs or DTCs with the HDS. Is DTC P2185 indicated? YES - Check for poor connections or loose terminals at ECT sensor 2 and the 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.
  27. Reconnect all connectors.
  28. Update the PCM if it does not have the latest software (see «PCM UPDATING AND SUBSTITUTION FOR TESTING»(ref-219956-S29187290912006021600000) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-219956-S20631232652006021600000) ).
  29. Check for Temporary DTCs or DTCs with the HDS. Is DTC P2185 indicated? YES - Check for poor connections or loose terminals at ECT sensor 2 and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-219956-S20631232652006021600000) ), then recheck. If the PCM was substituted, go to step 1 . NO - If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(ref-299652-S28764766372008092500000) ). If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.

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