Diagnostic Aids
WARNING: This page is about a different variant/trim than selected.
- Inspect the ECT sensor terminals for corrosion.
- A slight to moderate resistance in the IAT sensor signal circuit or low reference circuit will increase the range between these two sensors. This condition results in a greater voltage on the IAT sensor signal circuit, which is interpreted by the ECM as a colder IAT.
- If the condition is intermittent, allow the vehicle to sit for greater then 8 hours with the Vehicle OFF and the propulsion system inactive, may help isolate the condition. Compare the scan tool Radiator Coolant Temperature Sensor and ECT Sensor temperature sensor values at vehicle ON. The Radiator Coolant Temperature Sensor and the ECT Sensor values should display within 3°C (5°F).