Ambient Temperature Sensor / Switch HVAC: Testing and Inspection

INSPECTION

1. Ignition "OFF".
2. Disconnect ambient temperature sensor connector.
3. Check the resistance of ambient temperature sensor between terminals 1 and 2 whether it is changed by changing temperature of the ambient temperature sensor.
4. If the measured resistance is not specification, substitute with a known-good ambient temperature sensor and check for proper operation.




5. If the problem is corrected, replace the ambient temperature sensor.