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.
Section 17 (A/C-Heater System - Automatic): Description
The Automatic Temperature Control (ATC) system provides for manual or automatic control of passenger compartment air. When automatic mode is selected, system controls blower speed, temperature, and airflow.
Automatic temperature control is canceled when full heat or full cool is selected.
The system has self-diagnostic capabilities, and will store trouble codes for later retrieval. Trouble codes can be retrieved from ATC panel, or with a DRB scan tester.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.