Substitute lights and emergency lights actuation, function - GF82.10-P-3080LE
MODEL 216.3, 221.0/1 as of model year 2009/YoM 08
Function requirements, substitute/emergency lights actuation, general
- Circuit 15 ON
The status of circuit 15 is sent by the EZS control unit (N73) to the interior CAN (CAN B).
Backup/emergency lights actuation, general
The backup/emergency lights actuation ensures the minimum exterior lighting if the event of failure of individual system components of vehicle exterior illumination.
The backup/emergency lights actuation is comprised of the following subfunctions:
- Function sequence for substitute lamp actuation
- Function sequence, emergency lights actuation
Function sequence for substitute lamp actuation
The function of all vehicle exterior lighting bulbs is checked. If certain bulbs fail, their function is simulated by actuating other bulbs, with pulse width modulation if necessary. In such an instance, flashing functions have priority over steady light.
An active automatic lamp substitution function is notified to the instrument cluster (A1) by the front SAM control unit with fuse and relay module (N10/1) or the rear SAM control unit with fuse and relay module (N10/2) over the interior CAN. The message "substitute lights active" is displayed on the multifunction display of the instrument cluster (A1p13).
The scope of the substitute lamp actuation is country-specific.
| Actuation | Failure | Replacement | Timing device |
|---|---|---|---|
| Front parking lights actuation | Left standing light/parking light (E1e3) | Left front fog lamp (E5/1) (without code (236) Daytime running lights in LED design) | 100 Hz/25% |
| Right standing light/parking light (E2e3) | Right front fog lamp (E5/2) (without code (236) Daytime running lights in LED design) | 100 Hz/25% | |
| Rear parking lights actuation | Left brake light, taillight and parking light (E3e9) | Left rear fog light (E3e5) and additionally right rear fog light (E4e5) | 100 Hz/25% |
| Right brake light, taillight and parking light (E4e9) | Right rear fog light and additionally left rear fog light | 100 Hz/25% | |
| Front turn signal and hazard warning flasher actuation | Left turn signal light (E1e5) | Left front fog lamp (without code (236) Daytime running lights in LED design) | 100 Hz/50% |
| Right turn signal light (E2e5) | Right fog lamp (without code (236) Daytime running lights in LED design) | 100 Hz/50% | |
| Rear turn signal and hazard warning flasher actuation (With code (494) USA version for actuation of turn signaling only) | Left turn signal lamp | Left brake light, taillight and parking light (brake light only) | 100 Hz/25% |
| Right turn signal lamp | Right brake light, taillight and parking light (brake light only) | 100 Hz/25 % | |
| Stop lamp actuation | Left stop lamp, taillamp and parking lamp | Left rear fog light and additionally right rear fog light | no |
| Right stop lamp, taillamp and parking lamp | Right rear fog light and additionally left rear fog light | no | |
| Rear fog lights actuation | Left rear fog lamp | Left brake light, taillight and parking light (brake light only) | no |
| Right rear fog lamp | Right brake light, taillight and parking light (brake light only) | no |
Function sequence, emergency lights actuation
The aim of the emergency lights actuation is to prevent a complete failure of the vehicle outside lights due to a processor failure or due to the failure of the interior CAN.
To this end, both the front SAM control unit and the rear SAM control unit have separate hardware, which guarantees the emergency light function.
If the interior CAN or an SAM control unit fails, within t = 1.5 s the front standing lights and low beam actuation are activated by the independent hardware in the front SAM control unit and the rear standing lights actuation is activated by the independent hardware in the rear SAM control unit.
For vehicles with code (550) Trailer hitch, the trailer recognition control unit (N28/1) actuates the corresponding components in the trailer's lighting system via the trailer hitch socket, 13-pin (X58).
| Component description for instrument cluster | A1 Model 216.3, model 221 (except 221.095/195) |
GF54.30-P-6000LE |
| Model 221.095/195 | GF54.30-P-6000LEH | |
| Component description for front SAM control unit with fuse and relay module | N10/1 | GF54.21-P-6070LE |
| Component description for rear SAM control unit with fuse and relay module | N10/2 | GF54.21-P-6030LE |
| Component description for trailer recognition control unit | N28/1 For model 221 with code (550) Trailer hitch |
GF31.19-P-4050LE |
| EZS control unit, component description | N73 | GF80.57-P-6003LE |