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


To check sensor for proper operation, measure resistance across the terminals. At 59° F resistance should be 4114-4743 ohms. If not, replacement is necessary. To replace the sensor, proceed as follows:
1. Disconnect electrical connector and remove sensor.
2. Reverse procedure to install. Torque sensor to 72 inch lbs.