Reading and Clearing Diagnostic Trouble Codes

Verify that the following conditions are met before running the On-Demand Self-Test.
^ All doors, liftgate, and liftgate glass must be closed.
^ The transmission is in PARK.
^ The BPP switch is not pressed during the test and the parking brake is not set.
^ The accelerator pedal is not pressed during the test.
^ The vehicle is not in 4L mode.
1. Fulfill the pre-conditions.
2. Install a battery charger for the On-Demand Self-Test to prevent battery drain.
3. Run the air suspension On-Demand Self-Test.
4. Record all listed DTCs.
5. Retrieve stored DTCs.
6. Troubleshoot any On-Demand Self-Test DTCs first.
7. Retest and clear DTCs after repairs.