Activation - Networked Systems (CAN)

The following systems/functions are described in this article:
- Windshield wipers
- Rain sensor (B38)
- Rear window wiper/washer
- Headlamp cleaning system (HCS)
- Front dome lam
- Rear dome lamp
- Entrance/exit lamps
- Heated rear window


ACTIVATION

Windshield wipers:
The combination switch (S4) signal is a voltage coded signal sent to the electronic ignition switch control module (N73). From there it is sent via CAN bus to the signal pick-up and actuation module (N10/1 [left-front]). N10/1 in turn switches on the wiper motor (M6/1). The windshield washer pump (M5/1) is also actuated by the signal pick-up and actuation module (N10/1 [left-front]).

Rain sensor (B38):
The rain sensor signal is received by the roof control panel control module (N70) and then sent via CAN data line to the signal pick-up and actuation module (N10/1 [left-front]).

Rear window wiper/washer:
The switch signal is transferred as a voltage coded signal to the signal pickup and actuation module (N10/1 [left-front]). The function wiping signal is transferred from the signal pick-up and actuation module (N10/1 [left-front]) to the PSE control module (A37) via CAN data line. A37 in turn actuates the rear window wiper motor (M6/4). With the function washing, the switch signal is sent via CAN data line from the signal pick-up and actuation module (N10/1[left-front]) to the windshield washer pump (M5/1) or rear window washer pump (M5/3).

Headlamp cleaning system:
The switch signal is transferred as a voltage coded signal to the signal pickup and actuation module (N10/1 [left-front]). N10/1 in turn actuates the headlamp washer pump (M5/2).

Front dome lamp:
The left/right front door switches (S17/3, S17/4) conduct a ground
signal to the PSE control module (A37). In turn, the PSE control module (A37) sends a CAN message "Door open" to the roof control panel control module (N70).

Rear dome lamp:
The left/right rear door switches (S17/5, S17/6) send a ground signal to the PSE control module (A37) and in turn the PSE control module switches on the rear dome lamp (E15/3). Should the switch for the rear dome lamp be pressed on the roof control panel control module (N70), N70 will in turn send a CAN message to the PSE control module. PSE control module will switch on the rear dome lamp (E15/3) as a result.

Entrance/exit lamps:
If a door is opened, the corresponding door switch sends a ground signal to the PSE control module (A37). As a result, the PSE control module (A37) sends a CAN message Door open" to the passenger compartment bus. The door control module responsible for the open door receives the CAN message and in turn switches on the corresponding entrance/exit lamp.

Heated rear window:
The switch for the heated rear window is integrated into the A/C pushbutton control module. If the switch is pressed, a voltage coded signal is sent to the signal pick-up and actuation module (N10/1 [left-front]). N10/1 in turn sends a CAN message "Heated rear window ON" to the PSE control module (A37). The relay integrated in the PSE control module (A37) is then actuated. At the same time, the signal pick-up and actuation module (N10/1 [left-front]) actuates the LED in the heated rear window switch. Should the switch be pressed again, the CAN message as sent by N10/1 to A37 and the LED in the switch is interrupted. A timed shut-off occurs in appox. 12 minutes, which is actuated in turn by N10/1.