Block Diagram
CAN abbreviations
| A162 | Front interior lamp | R22 | Heated rear screen (glass breakage sensor, ATWS) |
|---|---|---|---|
| E55_L | Side turn signal, left | S135 | Bonnet switch |
| E55_R | Side turn signal, right | S195 | Luggage compartment switch |
| E106_L | Rear left lamp | S254 | Switch, ultrasonic sensor, ATWS |
| E106_R | Rear right lamp | X97 | Rear electronics module |
| E121_L | Headlamp, front left | Y13_D | Motor – central locking, driver |
| E121_R | Headlamp, front right | Y13_P | Motor – central locking, passenger |
| H16_A | ATWS horn | Y31_D | Motor – central door locking, rear left |
| H16_B | Alarm siren (Vauxhall) | Y31_P | Motor – central door locking, rear right |
Function Table
| Description | Source | Destination |
|---|---|---|
| Alarm horn switched on Service alarm system display ON | BCM | UEC DIS |
| Turn signal and hazard warning lights activation Flashing period and control cycle | BCM | CIM IPC REC UEC |
| Fan run-on active (prevents false ultrasonic alarm) Heated rear screen switch active | DIS | BCM |
| Radio remote control activation | CIM | BCM |
| Key identification | CIM | BCM |
Functional Description
The anti-theft warning system in the Vectra-C is shared between several control units. Communication between the various control units takes place via the low-speed CAN bus.
Body Control Module (BCM)
The BCM is the main control unit responsible for the anti-theft warning system function.
It is responsible for monitoring the door contact switches, the tailgate switch and the bonnet contact switch. The BCM evaluates the ultrasonic sensor with integrated inclination sensor and the rear screen status. It actuates the ATWS horn or the alarm siren (power sounder). It recognises the ultrasonic sensor in the dashboard and activates or deactivates the ultrasonic sensor for the next activation period.
Note. The auxiliary heating can deactivate the ultrasonic sensors in order to prevent triggering of the ATWS.
Steering Column Electronics Module (CIM)
The CIM establishes communication between the radio remote control and the vehicle, it receives the relevant radio remote control signal and transmits this to the relevant control unit as a CAN message.
Driver's Door Electronics Module (Ddm)
The DDM receives the required request from the BCM via the CAN bus and directly actuates the servo motors in the driver's door. The lock/unlock switch signals and the lock cylinder contacts in the driver's door are read in and transmitted via the CAN bus.
Passenger's Door Electronics Module (Pdm)
Corresponds to the driver's door electronics module (DDM)
Rear Electronics Module (REC)
The REC is responsible for actuation of the tailgate lock. The signal request is transmitted from the BCM via the CAN bus.
Display (Dis)
The display serves as the interface between the low-speed and mid-speed CAN busses in this function.