GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Geo 🢒 1997 🢒 Prizm 🢒 Engine 🢒 Engine Controls - 1.6L 🢒 Engine Coolant Temperature Sensor Replacement

Removal Procedure

    Object Number: 1578823 Size: SH
  1. Drain the engine coolant. Refer to Draining and Filling Cooling System in Engine Cooling.

    2. 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.

  2. Disconnect the negative battery cable.
  3. Remove the ECT sensor from the engine coolant inlet housing.

Installation Procedure

    Object Number: 1578824 Size: SH
  1. Install the ECT sensor (1) to the engine coolant inlet housing.
  2. Connect the ECT sensor electrical connector.
  3. Refill the engine coolant. Refer to Draining and Filling Cooling System in Engine Cooling.
  4. Connect the negative battery cable.

    5. Tighten
    Tighten the negative battery cable-to-negative battery terminal retainer to 15 N·m (11 lb ft).