Substitute Lights And Emergency Lights Actuation, Function - GF82.10-P-3080LF
Model 217, 222
Function requirements, general
- Terminal 15 ON
The electronic ignition lock control unit (N73) sends the status of terminal 15 to the rear SAM control unit (N10/8) via the interior CAN (CAN B).
Substitute lamp actuation/emergency light actuation, general
The substitute lamp actuation/emergency light actuation ensures operation of the minimum exterior lighting in the event of failure of individual system components for the vehicle's exterior lights.
The substitute lamp actuation/emergency light actuation consists of the following subfunctions:
- Function sequence for substitute lamp actuation (without code 460 (Canada version) and without code 494 (USA version))
- Function sequence for emergency light actuation
Function sequence for substitute lamp actuation (without code 460 (Canada version) and without code 494 (USA version))
The rear SAM control unit continuously monitors the function of the vehicle's rear lighting.
If the left rear turn signal light (E3e1) or right rear turn signal light (E4e1) fails, the left brake light (E3e4) or the right brake light (E4e4) is actuated at a flasher frequency.
A failure of the rear turn signal light is shown on the instrument cluster (A1). To this end, the rear SAM control unit sends corresponding requests over the interior CAN, electronic ignition lock control unit and the user interface CAN (CAN HMI) to the instrument cluster.
Function sequence for emergency light actuation
In the event of a fault on the interior CAN or the periphery CAN (CAN PER), the left headlamp control unit (E1n9), the right headlamp control unit (E2n9) and the rear SAM control unit activate a software emergency light. The rear SAM control unit then actuates the taillights and the brake lights (depending on the status of circuit 54). The headlamp control units activate the standing lights and the low beams. In case of failure of the light sensor (B38/2b2) in the rain/light sensor with additional functions (B38/2) or in case of communication failure with the rain/light sensor with additional functions, the front SAM control unit (N10/6) assumes that it is "Night" and the auto on/off driving lights are activated.
The following control units receive their power from the front SAM control unit via the circuit 30L:
- Left headlamp control unit
- Right headlamp control unit
- Front left actuation module, LED exterior lighting (E1n7) (model 217 and 222 until May 31, 2017 with code 640 (Dynamic SAE right-hand traffic LED headlamp) or code 641 (Dynamic left-hand traffic LED headlamp) or code 642 (Dynamic right-hand traffic LED headlamp))
- Front right actuation module, LED exterior lighting (E2n7) (model 217 and 222 until May 31, 2017 with code 640 (Dynamic SaE right-hand traffic LED headlamp) or code 641 (Dynamic left-hand traffic LED headlamp) or code 642 (Dynamic right-hand traffic LED headlamp))
- Front left lamp unit LED matrix control unit (E1n11) (model 222 from June 01, 2017 with code 640 (Dynamic SAE right-hand traffic LED headlamp) or code 641 (Dynamic left-hand traffic LED headlamp) or code 642 (Dynamic right-hand traffic LED headlamp))
- Front right lamp unit LED matrix control unit (E2n11) (model 222 from June 01, 2017 with code 640 (Dynamic SAE right-hand traffic LED headlamp) or code 641 (Dynamic left-hand traffic LED headlamp) or code 642 (Dynamic right-hand traffic LED headlamp))
The power supply is provided crosswise. If a circuit 30L is missing or a driver has failed, then the low beams are actuated at one side of the vehicle, for example, and the standing lights are actuated at the other side.
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