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

ENGINE COOLANT TEMPERATURE (ECT) SENSOR

REMOVAL

1. CAUTION: Make sure the ignition switch is in the OFF position prior to working on the electronic engine controls.

Turn the ignition switch to the OFF position.

2. WARNING: Never remove the pressure radiator relief cap while the engine is hot. Failure to follow these instructions can result in damage to the cooling system or engine or result in personal injury. To avoid having scalding hot coolant or steam blow out of the degas bottle when removing the pressure relief cap, wait until the engine has cooled, then wrap a thick cloth around the pressure relief cap and turn it slowly. Step back while the pressure is released from the cooling system. When certain all the pressure has been released, (still with a cloth) turn and remove the pressure relief cap. Failure to follow these instructions can result in personal injury.

CAUTION:
- The coolant must be recovered in a suitable, clean container for reuse. If the coolant is contaminated, it must be recycled or disposed of correctly and system filled with new coolant.
- Always fill the cooling system with the same type of coolant that was drained from the system. Do not mix coolant types.

Partially drain the cooling system.

3. Disconnect the cooling fan electrical connector.

4. Disconnect the engine coolant temperature (ECT) electrical connector.

5. Remove the ECT sensor.

INSTALLATION

1. NOTE: Apply clean engine oil to the O-ring before installation.

To install, reverse the removal procedure.
- Fill and bleed the engine cooling system.