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. Disconnect the engine coolant temperature (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.

4. Remove the ECT sensor from the electronic ignition (EI) system ignition coil adapter.

### Installation Procedure

1. Coat the threads of the ECT sensor with sealer.

Caution: Refer to Fastener Caution in the Preface section.

2. Install the ECT sensor into the EI system ignition coil adapter and tighten to 20 N·m (15 lb ft).
3. Connect the ECT sensor connector.
4. Fill the coolant system.
5. Connect the negative battery cable.