Electrics
Page 9.9
Calibration
The self-levelling sensors must be calibrated on vehicles “with steel
springs”. The self-levelling sensors must be calibrated before adjusting
the lights as part of the “vehicle handover”.
Re-calibration is only required following repairs, adjustment work on the
chassis, replacement of the headlight control unit or replacement of the
self-levelling sensors.
Calibration is essential in order to store the zero-position of the self-
levelling sensors in the headlight control unit. This set zero value is
required in order to calculate the position to be set for the stepper
motor for automatic range adjustment.
For vehicles with air suspension, another control unit is used to calibrate
the self-levelling sensors in the air suspension system. The values for
these self-levelling sensors are stored as CAN signals in CAN.
Calibration by the headlight control unit is not required therefore as the
required signals are evaluated directly by the headlight control units.
Bulb Failure
The following outputs are monitored:
Bulb Designation Output in Watt Failure detection
Static cornering light H11 55 W Series reactor
Xenon D1+ 32–38 W Series reactor
Auxiliary headlight H7 55 W Vehicle electrical
system control unit
High beam Switching motor for beam aperture Vehicle electrical
system control unit
Notes
As soon as a calibration error is detected,
a fault entry is recorded in the headlight
control unit. The driver is alerted to this by
the message “Headlight system fault” on
the on-board computer in the instrument
cluster.
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