DTC Troubleshooting

DTC Troubleshooting: P2185

DTC P2185: ECT Sensor 2 Circuit High Voltage

NOTE:

- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information. Reading and Clearing Diagnostic Trouble Codes

- Information marked with an asterisk (*) applies to '07-10 models.

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 4.92 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 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 4.92 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 (No. 1)* and body ground.

Is there about 5 V?
YES - Go to step 12.

NO - Go to step 16.


'06 model





'07-10 models





12. Turn the ignition switch to LOCK (0).

13. Jump the SCS line with the HDS.

14. Disconnect ECM/PCM connector A (44P).

15. Check for continuity between ECT sensor 2 2P connector terminal No. 1 (No. 2)* and ECM/PCM connector terminal A9.

Is there continuity?
YES - Go to step 27.

NO - Repair open in the wire between the ECM/PCM (A9) and ECT sensor 2, then go to step 22.


'06 model





'07-10 models





16. Turn the ignition switch to LOCK (0).

17. Jump the SCS line with the HDS.

18. Disconnect ECM/PCM connector A (44P).

19. Check for continuity between ECT sensor 2 2P connector terminal No. 2 (No. 1)* and ECM/PCM connector terminal A33.

Is there continuity?
YES - Go to step 27.

NO - Repair open in the wire between the ECM/PCM (A33) and ECT sensor 2, then go to step 22.


'06 model





'07-10 models





20. Turn the ignition switch to LOCK (0).

21. Replace ECT sensor 2. ECT Sensor 2 Replacement

22. Reconnect all connectors.

23. Turn the ignition switch to ON (II).

24. Reset the ECM/PCM with the HDS.

25. Do the ECM/PCM idle learn procedure. ECM/PCM Idle Learn Procedure

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, ECM/PCM Update or substitute a known-good ECM/PCM. Reading and Clearing Diagnostic Trouble Codes

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, Reading and Clearing Diagnostic Trouble Codes 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. Service and Repair If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.