headlamp actuation, function - GF82.10-P-2009SK

MODEL 171.4 

Driving light actuation consists of the following manual and automatic functions:

• Manual driving lamp actuation via the exterior lamp switch (S1), position "low beam ON"
• Automatic driving lamp actuation via the exterior lamp switch (S1) (position "AUTO") and the rain/light sensor (B38/2) (nighttime detected)
• Daytime running lamps depending on instrument cluster (A1) setting

Manual light activation 

Function requirements:

• Exterior lamp switch (S1) in low beam "ON" position
• Circuit 30 ON
• No overvoltage or undervoltage

Automatic driving light 

Function requirements:

• Exterior lamp switch (S1) in "AUTO" position
• Circuit 61 ON
• Rain/light sensor (B38/2) (night-time detected)
• No overvoltage or undervoltage

Daytime running lamps 

Function requirements:

• Function has been set to active on instrument cluster (A1)
• Circuit 61 ON
• No overvoltage or undervoltage

The operation of the exterior lamp switch (S1) is read in via a discrete line by the driver-side SAM control unit with fuse and relay module (N10/1). It discretely controls the relevant front lamps. The relevant rear lamps are discretely actuated via the Controller Area Network Bus class B (interior) (CAN-B) by the rear SAM control unit with fuse and relay module (N10/2).

Exterior lamp switch module, location/ function/design	Except code (614) bi-xenon headlamp unit	GF82.10-P-4104SK
	With code (614) bi-xenon headlamp unit	GF82.10-P-4104SKX
Rain/light sensor, location/task/function	With code (345a) rain sensor	GF54.21-P-4123SK
Instrument cluster (IC), location / task		GF54.30-P-3039SK