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)

Or, hide this message: temporarily or permanently

Ambient Temperature Sensor / Switch HVAC: Testing and Inspection

INSPECTION

1. Ignition "OFF".
2. Disconnect ambient temperature sensor connector.
3. Check the resistance of ambient temperature sensor between terminals 1 and 2 whether it is changed by changing temperature of the ambient temperature sensor.
4. If the measured resistance is not specification, substitute with a known-good ambient temperature sensor and check for proper operation.




5. If the problem is corrected, replace the ambient temperature sensor.