P0117

DTC P0117: ECT Sensor Circuit Low Voltage

NOTE: Before you troubleshoot, record all freeze data and review the general troubleshooting information.

1. Turn the ignition switch ON (II).
2. Check the ECT with a scan tool or the HDS.

Is 302 degree F (150 degree C) or higher, or 0 V indicated?

YES - Go to step 3.

NO - Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the ECT sensor and at the ECM.

3. Turn the ignition switch OFF.
4. Disconnect the ECT sensor 2P connector.
5. Turn the ignition switch ON (II).
6. Check the ECT with a scan tool or the HDS.

Is 302 degree F (150 degree C) or higher, or 0 V indicated?

YES - Go to step 7.

NO - Replace the ECT sensor.

7. Turn the ignition switch OFF.
8. Disconnect ECM connector C (31P).




9. Check for continuity between ECT sensor 2P connector terminal No. 2 and body ground.

Is there continuity?

YES - Repair short in the wire between the ECM (C26)and the ECT sensor.

NO - Substitute a known-good ECM and recheck. If normal ECT is indicated, replace the original ECM.