Volkswagen The Golf 2004 Service Training page 25

Tasks
The onboard supply control unit actuates and controls the following functions:
- Exterior light control with bulb monitoring
In the event of bulb failure, the relevant
warning lamp will ligh up or a text message is
displayed in the dash panel insert.
- Convenience light:
Coming home
Leaving home
Dimmable instrument backlights
- Coulisse lighting
- Windscreen wipers
Conveyance of CAN data bus signals from
onboard power supply control unit to wiper
motor control unit
The onboard supply control unit also controls the following functions:
- Interior light control
Terminal 30G, via which voltage is supplied to
the interior lights, is activated by the onboard
supply control unit.
- Heated rear window
When the heated rear window button is
actuated, the rear window is activated via the
onboard supply control unit.
- Terminal actuation
The onboard power supply control unit
controls terminal 75x via an X contact relief
relay.
Terminal 15 is actuated via terminal 15 voltage
supply relay in the electrics box.
Terminal 50 is actuated via terminal 50
voltage supply relay in the electrics box.
- Rear window wiper
When reverse gear is selected, the rear
window wiper is activated.
- Windscreen and rear window washer pump
- Turn signal control
- Electric load management Shut-off below
11.8 V, as in Touran
- Fuel pump readiness
When the driver's door is opened, the electric
fuel pump is supplied with power by the
onboard supply control unit.
After the engine has started, power is supplied
from the Motronic control unit.
For further information, please refer
to SSP 307
"The Touran - Electrical system".
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