GF82.10-P-2009QX Headlamp Control, Function

GF82.10-P-2009QX Headlamp Control, Function

The headlamp actuation encompasses the low and high beams lights. The actuation options for the driving lamps are:

^ Manual driving lamp actuation via the rotary light switch (S1s1) in "Driving lamps ON" position
^ Daytime running lamps depending on instrument cluster (A1) setting
^ Automatic driving light actuation via the rotary light switch (S1s1) in "AUTO" position, if the rain/light sensor (B38/2) has detected "Night"

Manual headlamp actuation
Function requirements:
^ Exterior lamp switch (S1s1) in low beam "ON" position
^ C. 30 ON
^ No overvoltage or undervoltage

The actuation of the rotary light switch (S1s1) is read in via a discrete line by the front SAM control unit with fuse and relay module (N10/1). It actuates the corresponding front lamps via a discrete line and sends the corresponding message for actuating the lamps via the Controller Area Network bus class B (interior) (CAN-B) to the rear SAM control unit with fuse and relay module (N10/2). This actuates the corresponding rear lamps via a discrete line.

Daytime running light

Function requirements:
^ Function has been set to active on instrument cluster (A1)
^ Terminal 61 ON
^ No overvoltage or undervoltage

The daytime running lamps function refers to the automatic switching-on of the exterior lights as soon as the engine starts to run. The daytime running lamps function can be activated by the driver using the 2nd control level on the instrument cluster (A1). In the following countries this function cannot be deselected (coding in instrument cluster (A1)):
^ Denmark
^ Finland
^ Iceland
^ Norway
^ Sweden
^ Canada

The instrument cluster (A1) notifies the front SAM control unit with fuse and relay module (N10/1) as to whether or not the daytime running lamps function has been activated. The combination with circuit 61 "ON" or circuit 61 "OFF" is performed by the instrument cluster (A1). In countries with statutory daytime running light regulations, the headlamp flasher may be used in daytime running mode, but not the high beam.

If the driver has set the daytime running lamps himself/herself using the 2nd control level on the instrument cluster (A1), then the headlamp flasher and high beam are permissible. The daytime running lamp function has priority over the automatic driving lamps request from the rain/light sensor (B38/2).

In Canada and the USA the high beam is not permissible.

Deactivating daytime running lamps
The daytime running lamps function is interrupted by:
Switching off the engine (circuit 61 OFF)
Switching on the driving lights manually at the rotary light switch (S1s1)
Deactivating the function in the instrument cluster (A1), except in the national versions (Denmark, Finland, Iceland, Norway, Sweden, Canada)

Automatic headlamp actuation
Function requirements:
^ Exterior lamp switch (S1s1) in "AUTO" position
^ the rain/light sensor (B38/2) has recognized "Night"
^ No overvoltage or undervoltage

Depending on the circuit status of the EIS control unit (N73) and on the direction of rotation, i.e. clockwise or counterclockwise, different lamps are actuated.

Function description
When starting a journey (circuit status 0-15C-15R-15-61), the following combination applies:
^ Circuit 15C OFF No light
^ Circuit 15C ON No light
^ Circuit 15R ON Standing lamps ON
^ Circ. 15 ON Standing lamps ON
^ Terminal 61 ON Standing lamp ON and low beam ON (high beam permissible)

When ending a journey (circuit status 61-15-15R-15C-0), the following combination applies:

^ Terminal 61 ON Standing lamp ON and low beam ON (high beam permissible)
^ Circ. 15 ON Standing lamp ON and low beam ON (high beam permissible)
^ Circuit 15R ON Standing lamps ON
^ Circuit 15C ON Standing lamps ON
^ Circuit 15C OFF No light

Special case for wiper operation:
If the wiper runs for 20 s with a cycle period of t < 6 s (not washing or touch-control wipe), then the vehicle lighting is switched on. If the wipe cycles remain off for 20 s, then the vehicle lighting goes off. If circuit 15R is switched off or the combination switch (S4) is set to the zero position, then the vehicle lighting is immediately switched off.

High-beams actuation
The high beam can be switched with the combination switch (S4) as steady light with low beam only. If the combination switch (S4) is already in "High beam ON" position before switching on the driving lamps, then the high beam is activated immediately during the journey when the driving lamps are switched on. High beam actuation using the headlamp flasher function is independent of the low beam.

In addition to the blue high beam indicator lamp (A1e3), a green low beam indicator lamp (A1e67) is also provided in the tachometer (A1p5) of the instrument cluster (A1).