Ambient Temperature Sensor / Switch HVAC: Testing and Inspection

AIR CONDITIONING: AMBIENT TEMPERATURE SENSOR: ON-VEHICLE INSPECTION

ON-VEHICLE INSPECTION

1. INSPECT AMBIENT TEMPERATURE SENSOR
(a) Disconnect the A6 ambient temperature sensor connector.






(b) Measure the resistance between terminals 1 and 2 of the A/C ambient temperature sensor at each temperature, as shown in the table below.
Standard resistance:





- Even slightly touching the sensor may change the resistance value. Be sure to hold the connector of the sensor.
- When measuring, the sensor temperature must be almost the same as the ambient temperature.
HINT: As the temperature increases, the resistance decreases (see the graph). If the resistance value is not as specified, replace the sensor.