GF82.10-P-0003CE Exterior Lights Function

GF82.10-P-0003CE Exterior Lights Function

Function requirements, general
^ Circuit 30 ON

Exterior Lights (ABL) In General
The exterior lights controls all the functions relevant to safety of the front lamps, side lamps and rear lamps of the vehicle. The ABL system includes the following partial functions:
^ Function sequence, on-board electrical system increase
^ Function sequence, switching off the exterior lights

Further subfunctions are described in separate documents:
^ Standing/parking lights actuation, function
^ Headlamp control, function
^ Additional functions of driving light control, function
(model 204.0/2 with code (614) Bi-xenon headlamp unit or code (618) Bi-xenon headlamp or code (615) Bi-xenon headlamp unit with integrated curve illumination or code (616) Bi-xenon headlamp unit with integrated asymmetric curve illumination or code (621) Intelligent light system (left-hand traffic) or code (622) Intelligent light system (right -hand traffic), model 204.9 with code (615) Bi-xenon headlamp unit with integrated curve illumination or code (621) Intelligent light system (left-hand traffic) or code (622) Intelligent light system (right -hand traffic))
^ Front fog light actuation, function
^ Turn signal indicator actuation, function
^ Brake light actuation, function
^ Backup lamp actuation, function
^ Headlight switch off delay function
^ Substitute lights and emergency lights actuation, function

Function sequence, on-board network increase
When the on-board electrical system voltage is decreased by the on-board electrical system management below the minimum voltage of a light function during normal driving operation, the front SAM control unit with fuse and relay module (N10/1) can suppress shutoff of the corresponding light function with the aid of the on- board electrical system increase. The front SAM control unit requests the minimum voltage required for the corresponding light function for this. The light functions for which the on-board electrical system increase is activated can be defined at the end of the production line.

The following functions can be coded:
- Low beam actuation when dark
(without code (614) Bi-xenon headlamp unit and without code (618) Bi-xenon headlamp and without code (615) Bi-xenon headlamp unit with integrated curve illumination and without code (616) Bi-xenon headlamp unit with integrated asymmetrical curve illumination and without code (621) Intelligent Light System (left-hand traffic) and without code (622) Intelligent Light System (right-hand traffic)
- Backup lamp actuation
- Actuation of front fog lights
(up to 30.11.09 and as of 1.12.09 without code (621) Intelligent light system (left-hand traffic) and without code (622) Intelligent light system (right -hand traffic))
- Rear fog lights actuation

Function sequence, switching off the exterior lights
Switching off the exterior lights prevents the on-board electrical system battery (G1) from being discharged by the active low beam and standing light actuation. The low beams may be switched on because of the auto on/off headlamps, the daytime running lights or manually via the exterior lights switch (S1). A prerequisite for this is the status of circuit 15 On.

If circuit 15 is Off, the low beams are switched off. The standing lights may be switched on because the low beams have been manually switched on, because of the auto on/off headlamps, the daytime running lights or manually via the exterior lights switch. If the standing lights have been switched on manually by moving the exterior lights switch to the "standing lights" position, the standing lights will not be switched off.

If the standing lights have been activated by manually switching on the low beams, the auto on/off headlamps or the daytime running lights and the driver door is then opened with a transmitter key (N73) in the electronic ignition lock control unit (A8/1), the standing lights are switched off.

If the ambient illumination function has been activated via the instrument cluster (A1), it automatically switches itself on when the engine is turned off. The standing lights remain switched on for a fixed time interval of t = 60 s.

The ambient illumination function is described in a separate document.