Air Suspension Control Module (ASCM)

C2212-00-ECU IN - PLANT MODE

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

Theory of Operation

The Air Suspension Control Module (ASCM) has a special diagnostic mode called "in-plant mode". Whenever any ASCM diagnostic routine is run the ECU will stop normal operation and enter this mode. All leveling functions will be disabled while in this mode. This is so that the technician can work on the vehicle knowing that the air suspension will not automatically readjust itself. The Service Air Suspension Message will be displayed on the cluster when this fault is first active

- When Monitored:
Continuously.

- Set Condition:
Run any of the Air Suspension Control Module (ASCM) diagnostic routines.





1. VERIFY THE DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, record and erase the DTCs.
3. With the scan tool, read the DTCs.

Is the DTC active at this time?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time.

2. HEIGHT SENSOR CHECK ROUTINE
1. Ignition on, engine not running.
2. With the scan tool, under Miscellaneous Functions run the "Height Sensor Check" routine.
3. With the scan tool, erase the DTCs.
4. With the scan tool, read the DTCs.

Does the DTC remain active?

Yes

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

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time.
- Perform the ASCM VERIFICATION TEST. ASCM Verification Test.