Actuate Driving Lights, Basic Function - GF82.10-P-1013A
MODEL ALL (CAR)
Overview
This document contains the following information:
- General
- Actuate low beam
- Actuate automatic low beam
- Actuate high beam
General
Driving lights include all the light functions required for optimum illumination of the roadway:
- Low beam
- High beam
- Daytime running lamps
- Headlamp range adjustment
- Cornering light (dynamic LED headlamps)
- Variable light distribution (dynamic LED headlamps)
- Automatic high beam (dynamic LED headlamps)
Vehicles with LFD headlamps
The front lamp units are equipped with fan motors. Operation of the fan motors provides active ventilation of the front lamp units (thermal management).
The fan motors are switched on when low beam or high beam are switched on.
Actuate low beam
The low beam illuminates the roadway without dazzling other road users. The low beam can be switched on and off manually or automatically. Low beam headlamps are operated using the exterior lights switch.
Function requirement
- Terminal 15 ON
Operating principle
The central controller unit (control unit of the exterior lighting) actuates the low beam in the front lamp units itself or requests the actuation. This takes place depending on the version of the front lamp units (halogen headlamps or LED headlamps).
An indicator lamp shows when low beam is switched on.
Vehicles with halogen headlamps
The difference in light colors for the light sources means that the standing lights are switched off when low beam is on.
The front standing lights are not switched off in the following countries:
- Brazil
- Georgia
- Canada
- Korea
- Russia
- Ukraine
- USA
- Belarus
Actuate automatic low beam
The low beam is switched on or off depending on the ambient brightness or depending on the activities of the windshield wiper system. The ambient brightness is sensed by the light sensor in the rain and light sensor. The central control unit actuates the windshield wiper system and provides information on its activities.
The automatic low beam is purely a comfort function and it does not relieve the driver of the need to follow the operating instructions as prescribed by the road traffic regulations.
In the event of any light sensor failure, the low beam is not deactivated until the engine is switched off.
If the windshield wiper system is active for 20 s with a wipe cycle time of less than 6 s, the low beam is switched on. If there are no wipe cycles for 60 s, the low beam is switched off. The low beam remains switched on when the wiper start suppression is active. If the wiper startup suppression function is canceled, the low beam remains switched on for a further 60 s.
With automatic low beam, the low beam and the standing lights are automatically switched on and off.
Function requirements
- Engine running or drivetrain operational or vehicle speed more than 3 km/h
- Exterior lights switch in "AUTO" position Operating principle
The central controller unit (control unit of the exterior lighting) actuates the low beam in the front lamp units itself or requests the actuation. This takes place depending on the version of the front lamp units (halogen headlamps or LED headlamps).
| Start of trip | Standing lamp | Low beam |
|---|---|---|
| Transmitter key not in the vehicle interior | Off | Off |
| Transmitter key in the vehicle interior | Off | Off |
| Circuit 15R ON | On | Off |
| Terminal 15 ON | On after 2 s | Off |
| Engine running or drivetrain operational or vehicle speed more than 3 km/h | Off (country-dependent) | On (high beams permissible) |
| End of trip At the end of a trip, overlaps may occur between the automatic low beam and the headlamp switch-off delay. |
Standing lamp | Low beam |
| Engine running or drivetrain operational or vehicle speed more than 3 km/h | Off | On (high beams permissible) |
| Transmitter key in the vehicle interior (driver door closed) | On | Off |
| Transmitter key in the vehicle interior (driver door open) | Off | Off |
| Transmitter key not in the vehicle interior | Off | Off |
Actuate high beam
The high beam provides sufficient wide-area illumination of the roadway. There is a risk here however of dazzling other road users.
The high beam is operated using the combination switch.
If the combination switch is pulled back and held (headlamp flashing), the high beam is switched on for a maximum of 30 s. After this, a permanently pending request is interpreted as being defective and the high beam is switched off.
Function requirements
- For headlamp flasher function: Circuit 15R On
- For high beams function: low beam On
- Automatic high beam (dynamic LED headlamps) not active
Operating principle
The central controller unit (control unit of the exterior lighting) actuates the high beam in the front lamp units itself or requests the actuation. This takes place depending on the version of the front lamp units (halogen headlamps or LED headlamps).
An indicator lamp shows when the high beam is switched on.
| Subsystems | |||
| Actuate daytime running lights, basic function | GF82.10-P-1015A | ||
| Headlamp range control, basic function | GF82.10-P-1016A | ||
| Actuate cornering lights, basic function | Model all (CAR) with code 640 (High-performance LED) Model all (CAR) with code 641 (Dynamic LED headlamps, left- hand traffic) Model all (CAR) with code 642 (Dynamic LED headlamps, right-hand traffic) |
GF82.10-P-1017A | |
| Variable light distribution, basic function | Model all (CAR) with code 641 (Dynamic LED headlamps, left- hand traffic) Model all (CAR) with code 642 (Dynamic LED headlamps, right-hand traffic) |
GF82.10-P-1019A | |
| Automatic high beams, basic function | Model all (CAR) with code 608 (Adaptive Highbeam Assist) Model all (CAR) with code 628 (Adaptive Highbeam Assist Plus) |
GF82.10-P-1020A | |
| LED headlamp thermal management, basic function | Model all (CAR) with code 631 (Static LED headlamps, left- hand traffic) Model all (CAR) with code 632 (Headlamps, LED, static, right- side traffic) Model all (CAR) with code 640 (High-performance LED) Model all (CAR) with code 641 (Dynamic LED headlamps, left- hand traffic) Model all (CAR) with code 642 (Dynamic LED headlamps, right-hand traffic) |
GF82.10-P-1030A | |
| Control units | |||
| Central controller unit, basic function | GF54.21-P-9895A | ||
| Headlamp control unit, basic function | Model all (CAR) with code 631 (Static LED headlamps, left- hand traffic) Model all (CAR) with code 632 (Headlamps, LED, static, right- side traffic) Model all (CAR) with code 640 (High-performance LED) Model all (CAR) with code 641 (Dynamic LED headlamps, left- hand traffic) Model all (CAR) with code 642 (Dynamic LED headlamps, right-hand traffic) |
GF82.10-P-9890A | |
| LED matrix control unit, basic function | Model all (CAR) with code 640 (High-performance LED) Model all (CAR) with code 641 (Dynamic LED headlamps, left- hand traffic) Model all (CAR) with code 642 (Dynamic LED headlamps, right-hand traffic) |
GF82.10-P-9891A | |
| Components | |||
| Rain and light sensor, basic function | GF54.21-P-2005A | ||
| Front lamp unit, basic function | GF82.10-P-2000A | ||
| Rear lamp unit, basic function | GF82.10-P-2004A | ||
| Exterior lights switch, basic function | GF82.10-P-2022A |