Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
In-Car Temperature Sensor: Operation
Air drawn from the passenger compartment by the in-car sensor aspirator motor assembly, and flows over the thermistor. The in-car sensor thermistor changes resistance with air temperature. The BCM measures this resistance and calculates the temperature of the air drawn into the ATC Control. The ATC system then makes adjustments to maintain the optimum passenger compartment comfort. Refer to IN-CAR SENSOR ASPIRATOR MOTOR OPERATIONΒ table for when the ATC Sensor is operating.
| CONDITION | MOTOR OPERATION |
|---|---|
| IGNITION SWITCH IS ON | MOTOR ALWAYS OPERATES, EVEN WHEN ATC CONTROL HEAD OFF BUTTON IS PUSHED |
| VEHICLE IS DRIVEN, THEN THE IGNITION SWITCH IS TURNED OFF | MOTOR TURNS OFF WHEN THE IGNITION SWITCH IS TURNED OFF |
| VEHICLE DOOR IS OPENED, AND LEFT OPEN, WITHOUT TURNING ON THE IGNITION SWITCH | MOTOR WILL TURN ON, AND THEN TURN OFF APPROXIMATELY 2 MINUTES FROM THE TIME THE DOOR WAS OPENED |
| VEHICLE DOOR IS OPENED, AND THEN CLOSED, WITHOUT TURNING ON THE IGNITION SWITCH | MOTOR WILL TURN ON, AND THEN TURN OFF APPROXIMATELY 2 MINUTES AFTER THE DOOR WAS CLOSED |
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.