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EHC System Components

Control Module

The Control Module is mounted in the module carrier box in the luggage compartment on the right side. It contains the processing electronics and final stages for operation of the EHC system.

The control module receives the follow- ing inputs for its processing functions:

  • KL 30 & 31 (Power/Ground)

  • KL 15

  • Left & Right Ride Height Sensors

  • K Bus for;

  • -

    Vehicle speed

  • -

    Engine running

  • -

    Door/tailgate - open/closed

12530012

The control module incorporates two filters (slow/rapid) for processing the input signals from the ride height sensors. Depending on the operating mode, either the slow or rapid fil- ter is used to check the need for a regulating sequence. The slow filter is used during the normal operation mode to prevent normal suspension trav- el from causing the system to make adjustments.

The rapid filter is used during the pre-run and tailgate (LID) modes to ensure that the sus- pension is adjusted quickly while the vehicle is being loaded or checked prior to operation.

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