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

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection

ECT SENSOR INSPECTION:
1. REMOVE ECT SENSOR.
2. INSPECT ECT SENSOR.

Engine Coolant Temperature (ECT) Sensor Resistance Values:




- Using an ohmmeter, measure the resistance between the terminals.
- If the resistance is not as specified, replace the sensor.
3. RE-INSTALL ECT SENSOR.

ECT SENSOR CIRCUIT INSPECTION