Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Coolant Temperature Sensor/Switch (For Computer): Service and Repair


Care must be taken when handling coolant sensor. Damage to coolant sensor will affect proper operation of the Fuel Injection system.
1. Relieve coolant pressure.
2. Disconnect negative battery cable.
3. Disconnect electrical connector.
4. Carefully back out coolant sensor.
5. Coat threads with sealant.
6. Install sensor in engine, torque to 30 N-m (22 Ft. Lbs.).
7. Connect electrical connector.
8. Connect negative battery cable.
9. Refill lost coolant.