Emergency lamp control, function - GF82.10-P-3013FQ

MODEL 218 

Function requirements, general 

• Terminal 15 ON

The electronic ignition lock control unit (N73) transmits the circuit 15 status to the front SAM control unit with fuse and relay module (N10/1) over the interior CAN (CAN B).

Emergency light actuation, general 

The 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.

Function sequence for emergency light 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. For this reason, both the front SAM control unit and the rear SAM control unit with fuse and relay module (N10/2) have separate hardware which guarantees the emergency light function.

If the interior CAN, the front SAM control unit or the rear SAM control unit fails, the separate hardware in the front SAM control unit activates the front standing lights actuation and low beam actuation within t < 3 s. The separate hardware in the rear SAM control unit activates the rear standing lights actuation and, depending on the status of circuit 54, the brake light actuation.