In-Car Temp Sensor Failure (ATC Aspirator Failure)

Test 1 - Test 3:

Test 4 - Test 7:

Test 8 - Test 11:

Test 12 - Test 14:

SYMPTOM
IN CAR TEMP SENSOR FAILURE (ATC ASPIRATOR FAILURE)

WHEN MONITORED
With the ignition on.

SET CONDITION
The BCM detects an abnormally high voltage (above 4.8 volts) or an abnormally low voltage (below 0.31 volts) on the in-car temperature sensor signal.

POSSIBLE CAUSES
- Fused B(+) circuit open
- Aspirator motor driver circuit shorted to voltage
- Aspirator motor driver circuit open
- Automatic temperature control - open aspirator motor
- Body control module - aspirator driver open
- Body control module - aspirator stays running
- Aspirator motor driver circuit shorted to ground
- IN-CAR temperature sensor signal circuit shorted to voltage
- Automatic temperature control - aspirator stays running
- Body control module - shorted IN-CAR temp sensor signal
- IN-CAR temperature sensor signal circuit shorted to ground
- IN-CAR temperature sensor signal circuit shorted to sensor ground
- IN-CAR temperature sensor signal circuit open
- body control module - open IN-CAR temp sensor signal
- Automatic temperature control - IN-CAR sensor code
- System is operational at this time
- Sensor ground circuit open
- Body control module - open sensor ground