Testing Procedure

NOTE: Air suspension control module cannot recognize some system failures. If no DTCs exist, but symptoms exist, match symptom with listed descriptions. See ELECTRONIC AIR SUSPENSION SYSTEM SYMPTOM INDEX table.

Perform VISUAL CHECKS . Service any faults found. Perform AIR SUSPENSION CONTROL MODULE DIAGNOSTICS . Record all Diagnostic Trouble Codes (DTCs) stored in air suspension control module. Service DTCs in order displayed. See ELECTRONIC AIR SUSPENSION SYSTEM DEFINITIONS table. After all DTCs and symptoms have been serviced, clear DTCs and retest system. See CLEARING DIAGNOSTIC TROUBLE CODES . If symptoms exist, but no DTCs have been stored, see ELECTRONIC AIR SUSPENSION SYSTEM SYMPTOM INDEX table for testing procedures.