Operation CHARM: Car repair manuals for everyone.

Engine - Coolant Temperature Sensor/Switch: Testing and Inspection




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

Detection Condition:





Possible Cause (Part 1):





Possible Cause (Part 2):





Possible Cause (Part 3):





Possible Cause (Part 4):





Step 1:





Step 2-Step 3:





Step 4-Step 6:





Step 7-Step 9:





Step 10-Step 13:





Step 14-Step 17:





Step 18: