C220C

C220C-00-ACTIVE SUSPENSION MODULE INTERNAL

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The Air Suspension Control Module (ASCM) continuously monitors internal hardware circuitry for defects. The Service Air Suspension Message will be displayed on the cluster when this fault is first active.

- When Monitored:
Continuously.

- Set Condition:
Detection of RAM, ROM, EEPROM, Watchdog, no current calibration, or high side switch defect recognized.





Diagnostic Test
AIR SUSPENSION CONTROL MODULE (ASCM) INTERNAL CONDITION
1. The ASCM is reporting internal errors.

NOTE: Before continuing, check the Air Suspension Control Module (ASCM) harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.

2. Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.
3. Perform any Technical Service Bulletins that may apply.

Were there any problems found?

Yes

- Repair as necessary.
- Perform the ASCM VERIFICATION TEST. ASCM Verification Test.

No

- Replace the Air Suspension Control Module (ASCM). Air Suspension Control Module - Removal.
- Perform the ASCM VERIFICATION TEST. ASCM Verification Test.