Cabin Temperature Sensor / Switch: Testing and Inspection

CONTROL SYSTEM INPUT COMPONENTS





In-vehicle Temperature Sensor
The in-vehicle temperature sensor is attached to the instrument panel. It converts variations in the temperature of the compartment air drawn in by the blower motor into a resistance value, which is then input to the EATC unit.














TROUBLE DIAGNOSES PROCEDURE FOR IN-VEHICLE TEMPERATURE SENSOR CIRCUIT

SYMPTOM:
- In-vehicle temperature sensor circuit is open or shorted (30 or 31 is indicated on the EATC unit as a result of conducting Self-diagnosis).

ELECTRICAL COMPONENT INSPECTION








In-vehicle Temperature Sensor
After disconnecting in-vehicle temperature sensor harness connector, measure resistance between sensor terminals 1 and 2 using the table.