For 1990-2009 cars

Notice: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.

### Removal Procedure

Important: Care must be taken when handling engine coolant temperature sensor. Damage to the engine coolant temperature sensor will affect proper operation of the fuel injection system.

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

1. Disconnect the negative battery cable.
2. Drain the radiator coolant.
3. Disconnect the ECT sensor electrical connector.
4. Using a 19 mm deep well socket and an extension remove the ECT sensor.

### Installation Procedure

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

Important: Care must be taken when handling engine coolant temperature sensor. Damage to the engine coolant temperature sensor will affect proper operation of the fuel injection system.

1. Hand start the ECT Sensor into the engine.

Tighten
Tighten the ECT Sensor to 30 N·m (22 lb ft).

2. Connect the electrical connector.
3. Refill the radiator with coolant.
4. Connect the negative battery cable.
5. Start the engine and check for leaks.
6. Check the coolant level.