Rear Axle Level Control System Control Unit, Component Description - GF32.33-D-3400H
MODEL 906 with CODE (CE2) Rear air suspension
Illustrated on model 639
Location
On model 906 the ELC control unit is located (N97) in the driver seat frame.
Task
The ELC control unit receives signals from the following components via direct lines:
- Raise/lower electronic level control switch (S77/2)
- Lock electronic level control switch (S77/1)
- Left rear level sensor (B22/7) and right rear level sensor (B22/10)
The ELC control unit uses the Controller Area Network bus class B (interior) (CAN-B) and receives the following messages over it:
- Vehicle speed
- Steering angle
- On-board voltage (battery voltage (G1))
- Circuit status (e.g. circuit 15)
- Vehicle variant
The ELC control unit actuates the following components after evaluating the input signals:
- Level control compressor (A9/1) with integrated air compressor motor (A9/m1) and air compressor pressure relief valve (A9/1y1)
- Level control valve unit (Y36) with both integrated left rear level control valves (Y36y1) and right rear level control valve (Y36y2)
- Electronic level control warning lamp (A1e5) in the instrument cluster (A1) and the indicator lamp in the lock electronic level control switch