P0117
DTC P0117: ECT Sensor Circuit Low Voltage1. Turn the ignition switch ON (II).
2. Check the ECT with a scan tool or the HDS.
Is 302 °F (150 °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. Disconnect the ECT sensor 2P connector.
4. Check the ECT with a scan tool or the HDS.
Is 302 °F (150 °C) or higher or 0 V indicated?
YES - Go to step 5.
NO - Replace the ECT sensor.
5. Turn the ignition switch OFF.
6. Disconnect the ECM connector C (31P).
7. 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.