Rainier AWD L6-4.2L (2007)
Coolant Temperature Sensor/Switch (For Computer): Service and Repair
Engine Coolant Temperature Sensor Replacement
Removal Procedure
Notice: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
1. Turn the engine OFF.
Caution: Refer to Battery Disconnect Caution.
2. Disconnect the negative battery terminal.
3. Drain coolant below the level of the engine coolant temperature (ECT) sensor. Refer to Draining and Filling Cooling System (LL8) Draining and
Filling Cooling System (LH6, LS2).
4. Disconnect the ECT sensor electrical connector (1).
5. Carefully remove the ECT sensor (1).
Installation Procedure
Notice: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
Notice: Replacement components must be the correct part number for the application. Components requiring the use of the thread locking
compound, lubricants, corrosion inhibitors, or sealants are identified in the service procedure. Some replacement components may come with these
coatings already applied. Do not use these coatings on components unless specified. These coatings can affect the final torque, which may affect
the operation of the component. Use the correct torque specification when installing components in order to avoid damage.
1. If installing the original sensor or a new sensor without sealant, apply thread sealer P/N 12346004 or equivalent.
