Initial Inspection and Diagnostic Overview

Inspection and Verification

WARNING: Before carrying out a road test, make sure the vehicle is safe to do so. Failure to follow this instruction may result in personal injury.

CAUTION: Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does not guarantee confirmation of a fault and may also cause additional faults in the vehicle being checked and/or the donor vehicle.

NOTE:
Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.
1 Gather as much information from the driver as possible and verify the customer concern by carrying out a road test, as closely as possible reproducing the conditions under which the fault occurs.
2 Visually inspect for obvious signs of mechanical damage.





3 If an obvious cause for an observed or reported condition is found, correct the cause (if possible) before proceeding to the symptom chart.
4 If the cause is not visually evident, verify the symptom and refer to the Symptom Chart, alternatively check for Diagnostic Trouble Codes (DTCs) and refer to the DTC Index.

DTC Index
For a list of Diagnostic Trouble Codes (DTCs) that could be logged on this vehicle, please refer to A L L Diagnostic Trouble Codes ( DTC ). For additional information, refer to Diagnostic Trouble Code (DTC) Index - DTC: Module Name: Adaptive Damping Control Module Adaptive Damping Module (SUMB)
For additional information, refer to Diagnostic Trouble Code (DTC) Index - DTC: Module Name: Air Suspension Control Module Air Suspension Control Module (RLM)