Vehicle Dynamics Control Module (VDM)

The VDM is the ECU for the vehicle dynamic suspension. The VDM monitors all sensor inputs and all HS-CAN2 messages relating to the vehicle dynamic suspension and then directly controls the valve solenoids.

When a new VDM is installed, the module must be programmed with the vehicle configuration information. Refer to:MODULE PROGRAMMING .

When one of the following components is installed new, disassembled, disconnected or removed the VDM requires calibration.

• VDM
• Suspension height sensor
• Front lower control arm
• Front strut assembly
• Rear lower control arm
• Rear shock

The calibration procedure is required for the system to learn the zero-position of the vehicle which means the vehicle must be on a level surface, must not be moving and cannot contain any passengers or cargo. The calibration procedure is carried out using a diagnostic scan tool. The calibration routine should not be performed with the vehicle raised off the ground or immediately after lowering the vehicle as the suspension will not be in a neutral position. The suspension must be neutralized before performing the calibration routine by driving the vehicle for a short distance such as around a parking lot.