Adjusting main headlight: Notes
The vehicle must be on a horizontal surface!
Make the adjustment with the regulator switch set to 0 (headlight beam adjustment)!
Make the adjustment with the vehicle ready for driving (fuel tank full, driver's seat occupied by a person or 75 kg; the tire pressure must correspond to the specified values) using a headlight adjustment unit.
Bi-Xenon main headlight
- Read out and erase the HBA fault memory before each adjustment of the headlights. To do this in the Porsche System Tester, select the Special functions menu, then select the HBA left menu or the HBA right menu, read out the fault memory, and erase it.
- If a new Bi-Xenon main headlight has been installed, the control unit must also be calibrated for level control before any adjustments are made.
Under menu item "Calibration", the headlight beam adjustment (HBA) control unit is adapted to the current conditions relating to vehicle position. During calibration the existing vehicle position is stored as zero position.
Following calibration, the headlight setting must be checked and corrected if necessary.
Calibration must be performed if changes were made that can change the position of the angle sensors:
- Headlights, complete
- HBA (Bi-Xenon) control unit
- HBA angle sensor (front and rear compression)
- Running gear components
- Damage caused by accidents
- Whenever the coding is changed in the menu item "Change coding", the ignition must always be switched off afterwards and the key removed.
- After the ignition is switched on again, the new coding of the control unit is updated and the stored faults can be erased.
- If the coding does not match the vehicle equipment, faults may be displayed that are not really present.
1. Press down on cover -1- in engine compartment and remove it. See Fig 1.
2. Turn on the ignition, turn on dipped beam and high beam headlights.
3. Check setting and adjust if necessary.
Adjusting:
Set headlight adjustment unit to 10 cm/10 m (1%)!
- The distance between the headlights and the adjustment unit should be as small as possible!
- It should not exceed 30 cm, because at greater distances it is no longer possible to define the formation of the light/dark limit in the adjustment unit clearly!
- The description refers to the left headlight.
With this alignment, preference must be given to the central zone around the salient point of the light/dark limit!
The vertical/side adjustment of the dipped beam/high beam highlight is carried out first using the flexible screwdriver P 9703 : adjustment -arrow A- and -arrow B- . See Fig 2.
4. To do this, line up the light/dark borderline running upwards at an angle on the right-hand side with the dotted 15° line of the adjustment unit.
5. The dipped beam headlight is then adjusted horizontally using the flexible screwdriver P 9703 : adjustment -arrow A- and -arrow B- . See Fig 3.
- Guide a flexible screwdriver nearly horizontally through the opening in the wing.
- The illustration refers to the halogen headlight.
To do this, line up the left, horizontal section of the light/dark limit (when driving on the right) with the dotted horizontal line of the adjustment unit.
6. Check the auxiliary high beam headlight and, if necessary, adjust the side setting with -arrow A- and -arrow B- . Use the flexible screwdriver P 9703 to do this. See Fig 5.
7. In the case of Bi-Xenon headlights, the ignition must be switched off and on after the adjustment has been made with the lights switched on.
8. After this, the adjustment must be checked again.
9. Fit cap again.