Self-Study Program

14
Control units
Master functions
–Exterior light control
– Coming home / leaving home
– LIN master for J400 - wiper motor control unit
– LIN master for G397 - rain and light detector sensor
Substitute master function
In case of failure of the convenience system central control unit J393, the onboard power supply control unit
J519 acts as the substitute master. It sends flash information via the CAN bus.
Other functions
– Voltage-encoded read-in of the rotary light switch
– Activation of the side lights warning lamp in the rotary light switch
– Electrical steering column adjustment
– Activation of the driver and front passenger footlights. The type of lighting, LED or conventional bulb can
be encoded in the onboard power supply control unit.
– Activation of the shift gate lighting
– Activation of the daytime driving lights
– Activation of the front and side turn signals
– Activation of the signal horn
– Activation of the windscreen and rear window washer pump V59
– Activation of the headlight washer system
– Activation of the rear window wiper motor V12
– Steering column adjustment memory
– Easy entry steering column adjustment
Emergency functions
If a fault is found in the rotary light switch or an open circuit in the wire to the rotary light switch, the onboard
power supply control unit automatically activates the light continuously.
If a fault has occurred in the light control, the light is activated continuously by the onboard power supply
control unit J519.