GF82.10-P-2011CE Headlight Switch Off Delay, Function

GF82.10-P-2011CE Headlight Switch Off Delay, Function
MODEL 204.0 /2 as of model year 2009 /YoM 08
MODEL 204.3
MODEL 204.9

Function requirements, general
^ No overvoltage or undervoltage (operating voltage range U greater than or equal to 7 less than or equal to 17.5 V)
^ "Ambient illumination function": activated in menu "Settings", "Light" in instrument cluster (A1)
^ Light sensor (B38/1) (without code (345) Rain sensor) or rain/ light sensor (B38/2) (with code (345) Rain sensor) signaling "Darkness recognized"
^ Exterior lights switch (S1) in position "AUTO" (vehicles up to 31.5.10) or in position "A" (vehicles as of 1.6.10)
In model 204.0/2 as of 1.3.11 and model 204.3 with code (615) Bi-xenon headlamp unit with integrated curve illumination or code (616) Bi-xenon headlamp unit with integrated 7 asymmetric curve illumination or code (621) Intelligent Light System (left-hand traffic) or code (622) Intelligent Light System (right-hand traffic), the light functions parking lights, standing lights and turn signal lights are output via light-emitting diodes (LEDs).
To output the light functions parking lights, standing lights and left turn signal light, the front SAM control unit with fuse and relay module (N10/1) actuates the left front standing light and parking light (E1e3) and the left front turn signal light (E1e5) in the left front lamp unit (E1) over the left LED, signaling lights actuation module (E1n7).
To output the light functions parking lights, standing lights and right turn signal light, the front SAM control unit actuates the right front standing light and parking light (E2e3) and the right front turn signal light (E2e5) in the right front lamp unit (E2) over the right LED, signaling lights actuation module (E2n7).
The LED, signaling lights actuation modules actuate the supply voltage of the LEDs.

Headlamp switch-off delay (SWA), general
The SWA function is used for leaving and finding the vehicle safely in darkness by switching on the vehicle's exterior lights (ambient illumination).
The SWA function is comprised of the following subfunctions:
^ Function sequence for headlamp switch-off delay (SWA)
^ Function sequence for locator lighting (AFB)

Function sequence for headlamp switch-off delay (SWA)
After the driver switches off the engine (change in status of circuit 15 ON to circuit 15R ON) the SWA function is then requested.
The following information is evaluated by the front SAM control unit for output of the SWA function:
- Activated SWA function, sent by the instrument cluster via interior CAN (CAN B)
- Status of circuit 15, sent by the electronic ignition lock control unit (N73) over interior CAN
- Light sensor status or rain/light sensor status, read in over the wiper/inside rearview mirror LIN (LIN 2)
- Exterior lights switch status read in via instrument panel LIN (LIN 1) (vehicles up to 31.5.10) or directly (vehicles as of 1.6.10)
After switching off the engine, the ambient illumination is switched on for a fixed time interval of t = 60 s. The time interval starts again by opening a vehicle door. The trunk lid (model 204.0/3) or the liftgate (model 204.2/9) is considered a vehicle door. If all vehicle doors are closed again, this time interval is limited to t = 15 s.
The status of the front doors is sent by the left front door control unit (N69/1) and the right front door control unit (N69/2), the status of the rear doors (in model 204.0/2/9), the trunk lid or the liftgate is sent by the rear SAM control unit with fuse and relay module (N10/2) over the interior CAN to the front SAM control unit.
The front SAM control unit evaluates all of the relevant information and transmits the request to switch on the ambient illumination via interior CAN to the following control units:
- Rear SAM control unit
- Trailer recognition control unit (N28/1) (with code (550) Trailer hitch)
- Front door control units (in model 204.0/2 as of 1.3.11, model 204.3)
The front SAM control unit actuates the following ambient illumination components:
- Left front headlamp unit
- Left front standing light and parking light
- Left front standing light 2 (E1e12) (in model 204.0/2 up to 28.2.11)
- Right front headlamp unit
- Right front standing light and parking light
- Right front standing light 2 (E2e12) (in model 204.0/2 up to 28.2.11)
- Additionally in vehicles up to 30.11.09 or as of 1.12.09 without code (621) Intelligent Light System (left-hand traffic) and without code (622) Intelligent Light System (right-hand traffic):
- Left front fog lamp (E5/1)
- Right front fog lamp (E5/2)
- Additionally with code (460) Canada version or code (494) USA version:
- Left front side marker lamp (E6/1) (model 204.0/2)
- Right front side marker lamp (E6/2) (model 204.0/2)
- Left front side marker lamp (E1e6) (model 204.9)
- Right front side marker lamp (E2e6) (model 204.9)
The rear SAM control unit actuates the following ambient illumination components:
- Left rear lamp unit (E3)
- Left rear fog light (E3e5) (pulsed at P = 5 W)
- Left brake light and taillight and parking light (E3e9)
- Inner left brake light and taillight (E3e10) (in model 204.0/2/3)
- Left rear side marker lamp (E6/3) (in model 204.0/2/3)
- Right rear lamp unit (E4)
- Right rear fog light (E4e5) (pulsed at P = 5 W)
- Right brake light and taillight and parking light (E4e9)
- Inner right brake light and taillight (E4e10) (in model 204.0/2/3)
- Right rear side marker lamp (E6/4) (in model 204.0/2/3)
- Left license plate lamp (E19/1)
- Right license plate lamp (E19/2)
- Additional with model 204.9 with code (460) Canada version or code (494) USA version
- Left rear side marker lamp
- Right rear side marker lamp
The trailer recognition control unit actuates the following components of the trailer lighting over the trailer socket (X58):
- Taillamps and parking lamps
- License plate lights
The left front door control unit actuates the left outside mirror ambient lamp (M21/1e1) (in model 204.0/2 as of 1.3.11, model 204.3).
The right front door control unit actuates the right outside mirror ambient lamp (M21/2e1) (in model 204.0/2 as of 1.3.11, model 204.3).
In vehicles up to 31.5.10, briefly switching on circuit 15 after switching off the engine means it is possible to leave the vehicle unnoticed without activating the headlamp switch-off delay (SWA).
The active headlamp switch-off delay is immediately terminated by switching on circuit 15 or by triggering an antitheft alarm system (ATA [EDW]) alarm (with code (551) Antitheft alarm system (ATA [EDW])).

Function sequence for AFB
When unlocking the vehicle using a radio frequency or infrared, the ambient illumination is switched on for a period of t = 40 s (time for the automatic relocking).
The electronic ignition lock control unit sends the status of the central locking via interior CAN to the front SAM control unit.
The front SAM control unit evaluates this and sends the "ambient illumination ON" request over interior CAN to the rear SAM control unit, the front door control units (in model 204.0/2 as of 1.3.11, model 204.3) and the trailer recognition control unit.
The components of the exterior lights are actuated as described for the headlamp switch-off delay function.
The locator lighting (AFB) function is terminated when a door is opened, when circuit 15C is switched on or when an ATA [EDW] alarm system alarm is triggered.
The headlamp switch-off delay and locator lighting functions run in parallel if necessary. However, an active headlamp switch-off delay function is not terminated by a requested locator lighting function and vice versa.