DTC P2185: ECT Sensor 2 Circuit High Voltage Honda Fit GE

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review GENERAL TROUBLESHOOTING INFORMATION .

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Scheme 234

1. Turn the ignition switch to ON (II).
2. Check ECT SENSOR 2 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, 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 to LOCK (0).
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 to ON (II).
7. Check ECT SENSOR 2 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 20 .
8. Turn the ignition switch to LOCK (0).
9. Remove the jumper wire from the ECT sensor 2 2P connector.
10. Turn the ignition switch to ON (II).
11. Measure the voltage between ECT sensor 2 2P connector terminal No. 2 and body ground. Is there about 5 V? YES: Go to step 12 . NO: Go to step 16 .
12. Turn the ignition switch to LOCK (0).
13. Jump the SCS line with the HDS.
14. Disconnect ECM/PCM connector A (49P).
15. Check for continuity between ECT sensor 2 2P connector terminal No. 1 and ECM/PCM connector terminal A10. Is there continuity? YES: Go to step 27 . NO: Repair open in the wire between the ECM/PCM (A10) and ECT sensor 2, then go to step 22 .
16. Turn the ignition switch to LOCK (0).
17. Jump the SCS line with the HDS.
18. Disconnect ECM/PCM connector A (49P).
19. Check for continuity between ECT sensor 2 2P connector terminal No. 2 and ECM/PCM connector terminal A34. Is there continuity? YES: Go to step 27 . NO: Repair open in the wire between the ECM/PCM (A34) and ECT sensor 2, then go to step 22 .
20. Turn the ignition switch to LOCK (0).
21. Replace ECT sensor 2 (see «ECT SENSOR 1 REPLACEMENT»(ref-320426-S22783962312009071400000) ).
22. Reconnect all connectors.
23. Turn the ignition switch to ON (II).
24. Reset the ECM/PCM with the HDS.
25. Do «ECM/PCM IDLE LEARN PROCEDURE»(ref-320447-S03803966382009071400000) .
26. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2185 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 Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.
27. Reconnect all connectors.
28. Update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(ref-320426-S22945234462009071400000) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-320425-S18610926012009071400000) ).
29. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2185 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-320425-S18610926012009071400000) ), 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-320426-S21651098282009071400000) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.