Reading and Clearing Diagnostic Trouble Codes

NOTE: There is no procedure for pulling codes without a scan tool.

Verify that the following conditions are met before performing the On-Demand Self-Test.
^ All doors, liftgate, and liftgate glass must be closed.
^ The transmission is in PARK.
^ The brake on/off (BOO) switch is not pressed during the test and the parking brake is not set.
^ The accelerator pedal is not pressed during this test.

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. Troubleshoot any On-Demand Self-Test DTCs first.
6. Recheck DTCs for continuous DTCs.
7. Retest and clear DTCs after repair.