Suspension Mode Switch: Description and Operation

Fig. 3 Selector Switch Wiring Circuit:

There are two selector switches located on the center console, Soft, and Firm. When the VDCM senses that neither switch is activated, (pins 9 and 10 both reading 5 volts), it will automatically assume the Norm setting. An LED illuminates to indicate the selected position.

SELECTOR SWITCH INPUT CHANGES

If the selector switch input changes, and no faults are present, the VDCM will illuminate the LED for the new selection. The VDCM will then attempt to drive all four motors (inside the shocks/struts) to the new position. If the system is functioning correctly, and all four motors obtain the new position, the LED for that setting will remain illuminated. The typical response time for all motors to reach a new position, is two seconds. If two seconds pass, and the VDCM senses that the four shocks/struts have not obtained the newly selected position, the VDCM will enter the Fault mode.

NORM, SOFT & FIRM SELECTIONS

If neither the Soft or Firm switch is closed, the module will illuminate the Norm LED and drive the motors to the Norm setting. The LED illuminating means a damping selection was received by the module. The brightness of the switch bezel display is controlled by circuit E02 from the headlamp switch.