DTC Troubleshooting
DTC P2185: ECT Sensor 2 Circuit High VoltageNOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.
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, 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. 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 18.
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. 2 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 E (31P).
15. Connect ECT sensor 2 2P connector terminal No. 1 to body ground with a jumper wire.
16. Check for continuity between ECM/PCM connector terminal E4 and body ground.
Is there continuity?
YES - Go to step 25.
NO - Repair open in the wire between the ECM/PCM (E4) and ECT sensor 2, then go to step 20.
17. Measure voltage between ECM/PCM connector terminal E1 and body ground.
Is there about 5 V?
YES - Repair open in the wire between the ECM/PCM (E1) and ECT sensor 2, then go to step 20.
NO - Go to step 25.
18. Turn the ignition switch OFF.
19. Replace ECT sensor 2.
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.
24. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If Temporary DTC or DTC P2185 is indicated, check for poor connections or loose terminals at ECT sensor 2 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.
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 ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM, 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. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.