Coolant Temperature Sensor/Switch (For Computer): Service and Repair

Coolant Temperature Sensor.:

CAUTION: On vehicles equipped with a SIR system, disable the SIR system. SEE SERVICE PRECAUTIONS/ VEHICLE DAMAGE WARNINGS/ DISABLING-ENABLING THE SIR SYSTEM.


REMOVAL

NOTE: The coolant temperature sensor used by the PCM and the coolant temperature sensor used by the temperature gage in the instrument cluster are similar. The sensor used by the PCM uses two wires and the sensor used for the temperature gage has a single wire.

NOTE: Engine coolant must be drained below level of temperature sensor before removal.

1. Disconnect negative battery cable.

2. Disconnect electrical connector from coolant temperature sensor.

NOTE: The connector must be removed by squeezing the sides. Apply pressure to sides of connector gently with pliers. Do not pull on wires.

3. Remove coolant temperature sensor using a deep well socket.

INSTALLATION

NOTE: Tap out sensor mounting hole in engine to remove any thread sealant residue. Clean any thread sealant from sensor threads and coat sensor with correct thread sealant if installing the same sensor.

1. Apply thread sealant SATURN P/N 21485277 (Loctite 242 or equivalent) to sensor threads.

2. Install coolant temperature sensor.
^ Torque: 8 Nm (71 in lbs)

3. Connect electrical connector to the coolant temperature sensor. Push in until a click is heard and pull back to confirm a positive engagement.

4. Connect negative battery cable.

CAUTION: On vehicles equipped with a SIR system, enable the SIR system. SEE SERVICE PRECAUTIONS/ VEHICLE DAMAGE WARNINGS/ DISABLING-ENABLING THE SIR SYSTEM.