Ambient Temperature Sensor / Switch HVAC: Service and Repair

OUTSIDE TEMPERATURE SENSOR, REPLACING

The outside temperature sensor is mounted on the blower motor housing behind the rear bulkhead splash shield.

1. Disconnect negative (-) battery cable.

2. On cars with coolant expansion tank in rear of engine compartment, remove hose from overflow tank and disconnect electrical plug from level sensor at tank. Unbolt expansion tank and move to one side.

3. Unclip wire harness protective cover on rear bulkhead. Cut wire ties as necessary.




4. Remove bulkhead splash shield by removing six retaining screws (arrows).




5. Slide outside temperature sensor (arrow) out of blower housing.

6. Replace sensor by cutting sensor wiring approximately 30 mm (1.2 in.) from sensor end. Remove approximately 40 mm (1.6 in.) of insulation from sensor harness.

7. Install heat shrink tubing on finished wiring splice. Connect wires from new sensor to harness wires and solder in place.

NOTE: To minimize danger of a short circuits, reconnect and solder the sensor wiring so that each wire splice is off- set from each other.

8. Installation is reverse of removal.