With Scan Tool

Fig. 2 Variable Dampening Suspension Wiring Circuit:

Fig. 6 Control Module Connector Identification:

Fig. 7 System Voltage Checks:

Fig. 8 System Connector Identification (Part 1 Of 2):

Fig. 8 System Connector Identification (Part 2 Of 2):

The DRB II can only detect the faults for the damper setting that the VDS system is currently in. In order to properly test the system, the selector switches must be used to put the system in each of the three damping settings.

Fig. 9 Diagnostic Connector.:

Fig. 10 Diagnostic Connector:

Connect the DRB II to diagnostic connector located in the vehicles trunk. Follow manufacture's instructions for use of the tool.

CHANGE OF SELECTED POSITION WHILE IN DIAGNOSTICS

If the selector switches are changed to a new position while in diagnostics, the system will try to go to the new position and will report faults only for the new position. System changes are not locked out during diagnostics. Any previous faults are cleared and only faults for the current damping position selected are reported.
The following example illustrates the diagnostic output with Firm being the selected damping position and the right front strut and left rear shock not operating correctly. The right front strut is stuck in the Soft position and the left rear shock gives Illegal sensor output. The same diagnostic output continues until a change occurs in the system. The change could come from the fault being repaired, selector switch position changing or a PFS drifting out of position. When a change occurs, the diagnostic output will show only the current status of the system.
1. Firm is the selected position (Firm switch grounded).
2. Left front and right rear PFS indicate Firm.
3. Right front PFS indicates Soft.
4. Left rear PFS indicates Illegal.
By pressing the Soft selector switch, the left front and right rear will go to the Soft position (if they are working correctly). The right front is still in the Soft position, but will not be detected as a fault because Soft is the selected position. The left rear continues to indicate an Illegal condition. The diagnostic output changes as the system changes. The DRB II now indicates that the left rear is the only present failure.

SPECIAL OVER CURRENT SHUTDOWN DIAGNOSTIC ROUTINE

If an over current condition is detected as a short in one of the shock/strut motor(s) circuit(s), the VDCM will report the shock(s) or strut(s) drawing excessive current. Any over currents must be repaired and the VDCM must be reset, before the module can diagnose any other faults.
NOTE: An over current shutdown condition takes precedence over the normal diagnostic routine. The VDCM will return to the normal diagnostic routine only when no over current shutdown conditions are detected.