GF82.20-P-2100LE Symbol and Ambiance Illumination, Function

GF82.20-P-2100LE Symbol And Ambiance Illumination, Function

Symbol and ambiance illumination in general
The symbol and ambiance illumination feature provides the brightness-adjustable illumination of all controls as well as the illumination of the vehicle interior.

The symbol and ambiance illumination feature consists of the following subfunctions:
^ Function sequence, search and symbol illumination
^ Function sequence for ambient lighting
(with code (876) Interior lights package)

Additional function requirements, search and symbol illumination
^ Standing lights ON, circuit 58

In the absence of the signal from circuit 58d and circuit status circuit 15R On, the corresponding components are actuated with a substitute brightness value corresponding to 50 %.

Function sequence, search and symbol illumination
To control the search and symbol illumination, the following information is read in and evaluated by the upper control panel control unit (N72/1) via the interior CAN (CAN B):
- Status for standing lights actuation from front SAM control unit with fuse and relay module (N10/1)
- Status of brightness control for switch and controls illumination/ Night View Assist display (S6/2r1) (setting of symbol illumination from 0 to 100 %) via the instrument panel LIN (LIN 1)

If the function "Locator lighting" has been activated via the COMAND control unit (A40/3), it automatically switches itself on when the vehicle is unlocked using the transmitter key (A8/1

This causes "Standing lights actuation active" status to be set, which also activates the search and symbol illumination. If the driver door is then opened, the "locator lighting" function goes off. The "Standing lights actuation active" status is canceled, and the instrument cluster (A1) deactivates the search and symbol illumination. The controls in the vehicle are not illuminated again until the transmitter key in the EIS [EZS] control unit (N73) is moved to the radio position (circuit 15R On.
When the "Auto On/Off headlamp" function is coded in position "0" with the rotary light switch (S1), the search and symbol illumination is actuated only when "Twilight recognized" according to the status of the rain/light sensor (B38/2) when circuit 15R is On.

The upper control panel control unit uses the incoming information to generate the circuit 58d signal and sends it via the interior CAN to the following control units:
- Front SAM control unit
- Rear control unit (N22/6) (model 216)
- Left door control unit (N69/1) (model 216) or Left front door control unit (N69/1) (model 221)
- Right door control unit (N69/2) (model 216) or Right front door control unit (N69/2) (model 221)
- Left rear door control unit (N69/3) (model 221)
- Right rear door control unit (N69/4) (model 221)
- Overhead control panel control unit (N70)

The upper control panel control unit controls the search and symbol illumination of the integrated controls and the following components.

Actuation via the instrument panel LIN:
- Exterior lamp switch
- Cockpit switch group (S6/2)

Direct actuation:
- Hazard warning system button (A40/9s3)
- Freely programmable button (A40/9s10)

The front SAM control unit actuates the following components:
- Center air vent illumination (E10/1)
- Left air outlet illumination (E10/2)
- Right air outlet illumination (E10/3)
- air nozzle illumination, rear (E10/5)
- Electric parking brake switch (S76/15) (symbol illumination)
- Additionally with code (301) Ashtray package/smoker package:
- Illumination (R3e1) of front cigar lighter with ashtray illumination (R3)
- Illumination (R3/1e1) of rear cigar lighter with ashtray illumination (R3/1)

The rear control unit (model 216) actuates the symbol illumination for the following components directly:
- Left rear power window switch (S21/3)
- Right rear power window switch (S21/4)

The overhead control panel control unit actuates the following components:
- Ambient lamp (A67e3) in the inside rearview mirror unit (A67) (model 221)
- Left rear dome lamp switch (E11/1s1) (model 221)
- Right rear dome lamp switch (E11/2s1) (model 221)
- Rear ambient lamp (E15/36) (model 221 as of 1.6.09)

On model 216 the ambient lamp in the inside rearview mirror unit is dependent on the status of circuit 15 and its brightness cannot be adjusted.

The brightness of the search and symbol illumination for the operating units is dependent on the status of circuit 15. At circuit 15 OFF the brightness value is set to the day value and at circuit 15 ON it is set specific to the status of circuit 58d.

The central gateway control unit reads the signal of circuit 58d via the interior CAN and relays it to the chassis CAN (CAN E) and central CAN (CAN F).

The steering column tube module (N80) reads in the circuit 58d signal via the chassis CAN.

The following control units read in the circuit 58d signal via the central CAN:
- Instrument cluster
- COMAND controller unit

The steering column module actuates the symbol illumination for the following components:
- Actuation via the steering LIN:
- Left multifunction steering wheel button group (S110)
- Right multifunction steering wheel button group (S111)

- Direct actuation:
- DIRECT SELECT gear selector switch (S16/13)

The COMAND control unit routes the circuit 58d signal to the following control units for actuation of the symbol illumination of the integrated controls on the telematics CAN (CAN A):
- DVD player (A40/4)
(model 221 with code (864) Rear Entertainment System)
- Left rear display (A40/5) and right rear display (A40/6)
(model 221 with code (864) Rear entertainment system)
- COMAND display (A40/8) (without code (867) SPLITVIEW) or SPLITVIEW display (A40/10) (with code (867) SPLITVIEW)
- Front central operating unit (A40/9)
- Rear air conditioning control unit (N22/4)
(model 221 with code (582) Rear air conditioner)
- RCP [HBF] control unit (N72/2)
(with code (406) Rear multicontour seat) or code (864) Rear entertainment system

The left door control unit (model 216) or the left front door control unit (model 221) actuates the symbol illumination for the following components via the front door LIN:(LIN B1):
- Driver power window outside mirror and trunk lid switch group (S20/1)
- Left front seat operation switch group (S22)
- Left interior CL [ZV] switch (S85/5)

The right door control unit (model 216) or the right front door control unit (model 221) actuates the symbol illumination for the following components via the front door LIN:
- Front passenger power window switch (S21/2)
- Right front seat operation switch group (S23)
- Right interior CL switch (S85/6)

The left rear door control unit (model 221) actuates the symbol illumination for the following components.
Actuation via rear door LIN (LIN B2):
- Left rear power window switch
(without code (297) Roller sun blinds in rear doors or without code (413) Panoramic glass sunroof with top sliding sunroof or without code (540) Power roller blind for rear window)
- Left rear door power window/roller blind switch group (S21/21)
(with code 297) Roller sun blinds in rear doors and code (413) Panoramic glass sunroof with top sliding sunroof and code (540) Power roller blind for rear window)
- Left rear seat control switch group (S55/1)
(with code (223) Rear seat bench with electrically adjustable outer seats with PRE-SAFE positioning function for outer seats and outer head restraints or code (276) Memory in rear or code (872) Electrically heated left and right rear seats or code (402) Rear comfort seats, incl. seat heating and seat ventilation)

Direct actuation:
- Left rear ashtray illumination (E9/8)
(model 221 with code (301) Ashtray package/smoker package)

The right rear door control unit (model 221) actuates the following components.
Actuation via the rear door LIN:
- Left rear power window switch
(without code (297) Roller sun blinds in rear doors or without code (413) Panoramic glass sunroof with top sliding sunroof or without code (540) Power roller blind for rear window)
- Right rear door power window/roller blind switch group (S21/22)
(with code 297) Roller sun blinds in rear doors and code (413) Panoramic glass sunroof with top sliding sunroof and code (540) Power roller blind for rear window)
- Left rear seat control switch group (S55/2)
(with code (223) Rear seat bench with electrically adjustable outer seats with PRE-SAFE positioning function for outer seats and outer head restraints or code (276) Memory in rear or code (872) Electrically heated left and right rear seats or code (402) Rear comfort seats, incl. seat heating and seat ventilation)

Direct actuation:
- Right rear ashtray illumination (E9/9)
(model 221 with code (301) Ashtray package/smoker package)

The symbol illumination of the controls located on the overhead control panel control unit is switched on when a vehicle door is opened even without reception of a circuit 58d signal with a brightness value, equivalent to 100 %. If the status of the vehicle doors no longer changes, the symbol illumination is switched off after t = 30 s.

The opening or closing of a vehicle door while this time interval is running down causes it to start again. The symbol illumination is switched off immediately when the vehicle is locked. Actuation of the symbol illumination in accordance with the status of the rain/ light sensor only takes place with circuit 15R On. For circuit 15 OFF the symbol illumination is actuated corresponding to the daytime brightness level.

Additional function requirements for ambient lighting (with code (876) Interior lights package)
^ Circuit 15 On
^ Rain/light sensor signals darkness
^ Brightness of ambiance illumination set

Function sequence for ambient lighting (with code (876) Interior lights package)
The ambiance illumination encompasses the actuation of different components for illumination of the footwells, instrument panel and vehicle doors.
The degree of illumination can be adjusted using the front central operating unit.
As of 1.6.09, three colors are also selectable for the ambience illumination. The color can be selected on the front central operating unit.
Selection of a color is not possible for the footwell illumination.

The following signals are read in and evaluated by the overhead control panel control unit for controlling the ambiance illumination:
- Rain/light sensor status
- Circuit 15 terminal status or status of central locking (CL [ZV]) by EIS [EZS] control unit via the interior CAN
- Status of ambient lighting brightness

The set brightness value and also, as of 1.6.09, color selection is stored on the central CAN by the COMAND control unit. The central gateway control unit (N93) provides the values to the overhead control panel control unit on the interior CAN.
The overhead control panel control unit transmits the request to switch on the ambient lighting to the following control units via the interior CAN:
- Left front seat control unit (N32/1) (model 221)
- Right front seat control unit (N32/2) (model 221)
- Upper control panel control unit
- Door control units (model 216)
- Front door control units (model 221)
- Rear door control units (model 221)

The upper control panel control unit actuates the following components:
- Right front footwell lamp (E17/15)
- Left front footwell lamp (E17/16)
- Ambiance illumination LED 1 (E43/1)
- Ambiance illumination LED 2 (E43/2)
- Ambiance illumination LED 3 (E43/3)
- Ambiance illumination LED 4 (E43/4) (model 216)

The ambiance illumination LEDs are mounted onto the instrument panel's trim strip.

On model 221 the left front seat control unit actuates the left rear footwell lamp (E17/18) and the right front seat control unit actuates the right rear footwell lamp (E17/17).

The left door control unit (model 216) or left front door control unit (model 221) actuates the following components:
- Left door inside handle illumination (E17/11) (model 216) Left front door inside handle illumination (E17/11) (model 221)
- Left door trim strip illumination (E17/43) (model 216) Left front door trim strip illumination (E17/43) (model 221)

The right door control unit (model 216) or right front door control unit (model 221.) actuates the following components:
- Right door inside handle illumination (E17/12) (model 216) Right front door inside handle illumination (E17/12) (model 221)
- Right door trim strip illumination (E17/44) (model 216) Right front door trim strip illumination (E17/44) (model 221)

The left rear door control unit (model 221) actuates the following components.
- Left rear door inside handle illumination (E17/13)
- Left rear door trim strip illumination (E17/45)

The rear door control unit (model 221) actuates the following components.
- Right rear door inside handle illumination (E17/14)
- Right rear door trim strip illumination (E17/46)