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

WATER THERMOSWITCH

Testing Water Thermoswitch:






INSPECTION
1. Remove the Water thermoswitch.
2. Place the switch in water with a thermometer and heat up the water gradually.
3. Check the continuity of the terminals. If necessary, replace the switch.

CONNECTION GUIDE

WATER TEMPERATURE CONTINUITY

Below 65°C (149°F) YES

Above 72 ± 5°C (162 ± 41°F) NO