P0117
DTC P0117: ECT Sensor Circuit Low Voltage1. Turn the ignition switch ON (II).
2. Check the ECT with the 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 terminals at the ECT sensor and at the ECM/PCM.
3. Disconnect the ECT sensor 2P connector.
4. Check the ECT with the 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 ECM/PCM connector B (24P).
7. Check for continuity between the ECT sensor 2P connector terminal No.1 and body ground.
Is there continuity?
YES - Repair short in the wire between the ECM/PCM (B8) and the ECT sensor.
NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.