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

Engine Temperature Sensor: Testing and Inspection




INTAKE AIR TEMPERATURE (IAT) SENSOR AND ENGINE COOLANT TEMPERATURE (ECT) SENSOR / CYLINDER HEAD TEMPERATURE (CHT) SENSOR





Detection Condition:





Possible Cause (Part 1):





Possible Cause (Part 2):





Possible Cause (Part 3):






Step 1-Step 2:





Step 3-Step 5:





Step 6-Step 8:





Step 9-Step 12:





Step 13-Step 15:





Step 16-Step 18: