The following information is for the Touareg but the principle is same on many Volkswagen cars with this feature.
The cornering light functions are automatically activated when the dipped or high beam is switched on.
The cornering lights are also active if the headlights are switched on in daylight.
The Bi-Xenon units are swiveled independently when driving around bends.
The headlight on the inner side of the bend by max. 15° and the headlight on the outer side of the bend by max. 7.5°.
Swivelling only takes place at a vehicle speed above 10 km/h.
The design is very similar to that of a conventional Bi-Xenon unit.
However, the module is mounted in an additional swiveling frame (for the horizontal motion).
The sensor is for detecting the swivel angle.
The static cornering light is a light that is switched on in addition to the dimmed headlight. It illuminates the surface to the side of the vehicle.
The static cornering light is only switched on at a vehicle speed below 50 km/h in narrow bends.
Halogen light H7 for static cornering light.
The H7 light bulb can be replaced after removing the plastic bush
Networking between J745 (control unit for cornering light and headlight range control) and the power modules for headlights J667 and J668 via CAN light.
CAN light is a separate CAN databus only for networking the cornering light system.
Physically, the CAN light is identical to the CAN drive (voltage level, data rate and cable colors).
The power modules are installed in the headlights. The power modules process sensor signals (swivel angle of dynamic headlight and position of headlight range control) and control the respective servomotors.
The static cornering light is switched on and off by the corresponding power module.
All other lights in the headlight are switched by the on-board control unit.
G85 – Steering angle sensor
J104 – Control unit for ABS/ESP
J197 – Control unit for level control
J220 – Control unit for Motronic
J285 – Control unit in the dash panel insert
J519 – On-board network control unit
J527 – Control unit for steering wheel electronics
J533 – Diagnostic interface for databus
J667 – Power module for left headlight
J668 – Power module for right headlight
J754 – Control unit for cornering light and headlight range control
Faults in the cornering light system are signaled to the driver by flashing control lamps for monitoring the light bulbs in the dash panel insert.