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.
Air Suspension Control Module (ASCM)
DESCRIPTION
| 1 - ASCM |
Vehicles equipped with air suspension include an ASCM which is mounted to the air compressor and is positioned outside the right rear frame rail near the rear bumper.
OPERATION
The ASCM battery positive voltage is received from a fuse located in the Power Distribution Center (PDC). Multiple modules work together to increase vehicle stability and traction along with vehicle ride height. The ASCM uses several Controller Area Network (CAN) data bus systems for inputs and outputs of the information necessary for the different systems to operate. The use of a scan tool is necessary for diagnostics, and replacement of the ASCM (or any pressurized components of the system). For more information on the air suspension system. Refer to AIR SUSPENSION, DESCRIPTION AND OPERATION .
NO RELATED
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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.