Removing and installing headlights MX1/MX2, headlights with gas discharge bulb — VW

Removing and installing headlights
MX1
/
MX2
, headlights with gas discharge bulb
WARNING
Never change bulbs if you are not familiar with the appropriate procedures, safety precautions and tools.
If repairs are to be made to the headlights with gas discharge bulbs, observe the following:
Notes on dangerous high voltage/currents
Notes on pressure, temperature and radiation/arcs
Assembly notes for gas discharge bulbs
Disposal regulations for gas discharge bulbs
Special tools and workshop equipment required
Safety goggles
Gloves
Note on dangerous high voltage/currents
WARNING
Control units for light systems, connectors and components pertaining to bulb holders conduct lethally high voltage.
Operating the control unit and the starter unit is permitted only with the bulb fitted.
WARNING
Switch off ignition and all electrical loads, and pull out ignition key.
When working on headlight system, determine that there is no voltage in any components, including the dissipation of residual voltage after the headlights are switched off.
Residual voltage can be dissipated by turning the dipped beams on and then off again after withdrawing the ignition key.
When working on the headlight system, ensure that the lights cannot be switched on.
Notes on pressure, temperature and radiation/arcs
WARNING
The bulbs may be operated in the headlight housing only (protection against contact due to very hot bulbs, absorption of UV radiation, avoidance of dazzling light, protection against explosion).
The glass bulb of the bulbs can be very hot - danger of burns!
Avoid looking directly into the collimated beam as the UV radiation from the gas discharge bulb is about 2.5 times greater than from normal halogen bulbs.
Avoid looking into the light beam (danger of glare); otherwise vision may be impaired for a substantial length of time.
WARNING
Avoid contact with burst glass bulbs.
H7 bulbs and gas discharge bulbs (xenon and bi-xenon) are under pressure and can explode while being changed - danger of injury.
Always wear eye protection and gloves when removing and installing gas discharge bulbs!
Repair notes for gas discharge bulbs
Caution
Before renewing a bulb, always switch off the concerned electrical consumer.
Switch off ignition and all electrical loads, and pull out ignition key.
Do not touch the bulb glass with bare fingers. Use clean fabric gloves. When the light bulb is switched on, the heat would vaporise the oil of the finger prints which would then settle on the reflector, impairing the brightness of the headlight.
A light bulb must always be renewed with a bulb of the same sort. The designation appears on the base of the bulb or on the glass bulb.
Properly engage connector during installation and ensure tight seating of the connection.
Disposal regulations for gas discharge bulbs
WARNING
Gas discharge bulbs must be disposed of as hazardous waste; never dispose of gas discharge bulbs via household waste system.
Gas discharge bulbs contain metallic mercury (Hg) and traces of thallium; never destroy these bulbs.
These components must be recycled in the correct manner according to national law.
Only dispose of in containers intended for this purpose at an authorised collection point.
Note
Before working on headlight with gas discharge lights and corning lights, always switch off the headlights and move the ignition key to position 0 (locked).
The automatic headlight range control and cornering lights on headlights with gas discharge bulbs is equipped with self-diagnosis.
When dealing with complaints, it is absolutely essential that the function and operation of the lighting system are first understood.
Additional information:
Note
After measures that could influence the headlight setting, check the headlight setting and, if necessary, correct
Maintenance
Booklet
Work descriptions.
Operating manual
Self-study programme
Self-study programme
No.
335
The Cornering Light System
Self-study programme
Self-study programme
No.
488
The Passat 2011
Current flow diagrams, Electrical fault finding and Fitting locations
General description:
The headlights with gas discharge bulbs and cornering lights (AFS = Adaptive Front Lighting System) have a
“bi-xenon” function.
With conventional
“xenon” headlights, the gas discharge bulb only generates the dipped beam. The
“bi-xenon” features makes it possible to generate both the dipped beam and the main beam with
“one” gas discharge bulb. To achieve this, the dip beam screen motor
V294
/
V295 uncovers the screened area of the dipped beam on actuation of the main beam, thus producing main beam light distribution.
This means that with
“bi-xenon” headlights the main beam is always automatically adjusted together with the dipped beam.
The headlights with gas discharge bulbs and cornering lights do not have an
“additional main beam”.
Fault detection and fault display:
The automatic headlight range control, the cornering lights and onboard supply control unit
J519 feature self-diagnosis to facilitate fault finding for headlights with gas discharge bulbs and cornering light.
For fault finding, use the systems described in chapter
“Vehicle diagnosis, testing and information system” in
“Guided Fault Finding” mode (see the separate procedure).
Note
The
“bulb failure” warning lamp in the dash panel lights up when the headlight range control or the AFS (adaptive front lighting system) malfunctions.
Removing and installing headlight
Headlights with gas discharge bulbs and cornering light are removed and installed in the same way as halogen headlights.
Removing and installing headlights (see the separate procedure).