System Overview: Signals
The table below summarizes the input signals to and output signals 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) |
- Oil pressure and temperature sensor.
|
- Electrical feed pump
- Axial solenoid - pulse width modulated (PWM) signal.
|
| Via Controller Area Network (CAN) communication: |
Via Controller Area Network (CAN) communication: |
- Central electronic module (CEM) (4/56), status of the parking brake switch, ignition key position and back-up (reverse) signal
- Brake control module (BCM) (4/16), the wheel speed from the wheel rotation sensor and the status signal (to open the coupling during stability control)
- The engine control module (ECM) (4/46), provides data about engine speed (RPM), torque, accelerator pedal (AP) position and the status of the stop lamp switch.
|
- Brake control module (BCM) (4/16), status of the clutch.
|
Courtesy of VOLVO CARS OF NORTH AMERICA.