System Overview: Signals
The table below summarizes input and output signals to and from the Differential Electronic Module (DEM). The illustration below displays the same information with the Volvo component designations.
| Input signals |
Output signals |
| Directly connected: |
Directly connected:
(power supply unless otherwise stated) |
| - |
- Electric feed pump
(internal in AOC) - pulse-width modulated (PWM) signal
- Pressure reducing valve
(internal in AOC) - pulse-width modulated (PWM) signal
|
| Via Controller Area Network (CAN) communication: |
Via Controller Area Network (CAN) communication: |
- central electronic module (CEM)
(4/56), provides the status of, among other things, the ignition position and the back-up (reverse) gear.
- Brake Control Module (BCM)
(4/16), informs on the speed of the wheels from the wheel speed sensors and ABS modulation status amongst other things.
- Driver Information Module (DIM)
(5/1), informs on parking brake switch status.
- Engine Control Module (ECM)
(4/46), informs on engine speed, driver engine torque request, calculated engine torque, accelerator pedal position, stop lamp switch status and clutch pedal switch status, amongst other things.
- Trailer module (TRM)
(4/110), provides information about whether a trailer is connected to the vehicle or not.
|
- Brake control module (BCM)
(4/16), receives information about the status of the coupling unit and current torque capacity for the rear axle.
- Central Electronic Module (CEM)
(4/56), receives information on the diagnostic status of the Differential Electronic Module (DEM).
- Driver information module (DIM)
(5/1), via Central electronic module (CEM) receives information about malfunction messages from Differential electronic module (DEM). These are shown to the driver as text messages and warning symbols.
|
Courtesy of VOLVO CARS CORPORATION