Control Unit
The EHC2 Control Unit is located behind the glovebox adjacent to the General Module.
The connector is a black 54 pin connector.
Inputs received directly into the control unit are
| Ride Height Level Sensor (X4) | Up and Down requests from the switch assy. |
|---|---|
| General Module (Load cutout signal) | CAN Bus Inputs |
| K Bus Inputs | Pressure Sensor |
| Compressor Temperature | |
| Outputs include | |
| Air Unit Control (Activation) | Front and Rear Axle Valves |
| LED's for Switch Unit | Compressor Relay |
| Pressure Accumulator | |
CONTROL UNIT INPUTS AND OUTPUTS
Identifying Switch Assembly. Scheme 202
The dash mounted switch assembly supplies a momentary switched ground to the EHC2 Control Unit requesting a ride height change in the up or down direction. Three LED's provide current ride level selected and target ride level if a request for change has been made. The LED for the current ride height will always be illuminated. The LED for the target ride level will flash until the new ride level is reached.