Ambient Temperature Sensor / Switch HVAC: Service and Repair

Inspection

1. Ignition "OFF"
2. Disconnect ambient temperature sensor.
3. Check the resistance of ambient temperature sensor between terminals 1 and 2 whether it is changed by changing of the ambient temperature.









Specification





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.

Replacement

1. Disconnect the negative (-) battery terminal.
2. Remove the under cover (A).




3. Disconnect the connector and then remove the ambient temperature sensor (A).




4. Installation is the reverse order of removal.