For 1990-2009 cars

### Removal Procedure

1. Relieve the coolant system pressure.

Warning: Refer to Battery Disconnect Warning in the Preface section.

2. Disconnect the negative battery cable.
3. Drain the coolant below the engine coolant temperature (ECT) sensor level.
4. Disconnect the ECT sensor connector.

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

5. Remove the ECT sensor.

### Installation Procedure

Caution: Refer to Fastener Caution in the Preface section.

1. Install the ECT sensor.

Tighten
Tighten the ECT sensor to 20 N·m (15 lb ft).

2. Connect the ECT sensor connector.
3. Fill the cooling system. Refer to Cooling System Draining and Filling.
4. Connect the negative battery cable.