Automatic Interior Lights Control, Function - GF82.20-S-2200TRA
Model 447.6
Model 447.7
except code ZH6 (Marco Polo ACTIVITY)
Model 447.8
except code ZK7 (Equipment line MARCO POLO)
Model 448
Illustration shows Model 447.8
Shown on model 447.6/7
Function requirements, general
- No overvoltage or undervoltage (operating voltage range U from 8.5 to 17 V)
Automatic interior lights control in general
The automatic interior lights control actuates all the components of the interior illumination (IBL). The appropriate requests are generated automatically. The master control unit for the automatic interior lights control is the signal acquisition and actuation module (SAM) control unit.
The automatic interior lights control function encompasses the following subfunctions:
- Locator lighting function sequence
- Function sequence for orientation lighting
- Function sequence for warning and exit illumination
- Function sequence for trunk illumination
- Function sequence for IBL with anti-theft alarm system (ATA) alarm (with CODE FZ5 (Anti-theft alarm system) or with CODE FY1 (Theft protection package))
- Function sequence for IBL after accident
Additional function requirement for locator lighting
- Automatic interior lights switched on using the interior lamp automatic function button
The overhead control panel (OCP) control unit reads in the status of the interior lamp automatic function button directly and transmits this via the roof LIN to the signal acquisition and actuation module (SAM) control unit.
Locator lighting function sequence
When unlocking the vehicle via radio, the signal acquisition and actuation module (SAM) control unit activates the locator lighting.
The electronic ignition lock (EZS) control unit transmits the status of the central locking (CL) via the interior CAN to the signal acquisition and actuation module (SAM) control unit. The signal acquisition and actuation module (SAM) control unit then transmits the request to switch on the IBL via the roof LIN to the overhead control panel (OCP) control unit.
The overhead control panel (OCP) control unit then actuates the following components directly:
- Front interior lamp
- Center trunk lamp (model 447.8, 448.8)
- Ambiance illumination in left front grab handle (with CODE LC6 (Illumination in rear grab handle with reading spotlight)) (model 447.7/8, 448.7/8)
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- Ambiance illumination in right front grab handle (with CODE LC6 (Illumination in rear grab handle with reading spotlight)) (model 447.7/8, 448.7/8)
- Ambiance illumination in left rear grab handle (with CODE LC6 (Illumination in rear grab handle with reading spotlight)) (model 447.7/8, 448.7/8)
- Ambiance illumination in right rear grab handle (with CODE LC6 (Illumination in rear grab handle with reading spotlight)) (model 447.7/8, 448.7/8)
- Ambiance illumination in left front grab handle (with CODE LC6 (Illumination in rear grab handle with reading spotlight)) (model 447.7/8, 448.7/8)
- Ambiance illumination in right front grab handle (with CODE LC6 (Illumination in rear grab handle with reading spotlight)) (model 447.7/8, 448.7/8)
- Ambiance illumination in left rear grab handle (with CODE LC6 (Illumination in rear grab handle with reading spotlight)) (model 447.7/8, 448.7/8)
- Ambiance illumination in right rear grab handle (with CODE LC6 (Illumination in rear grab handle with reading spotlight)) (model 447.7/8, 448.7/8)
If the ambient illumination function is activated through the instrument cluster (IC [KI]) control unit, it automatically switches itself on through the central locking when the vehicle is unlocked. This leads to the fact that the search and symbol illumination is switched on. The symbol and ambiance illumination function is described in the separate "Symbol and ambiance illumination, function" document.
The signal acquisition and actuation module (SAM) control unit also actuates the request to switch on the following components directly:
- Dome lamp in left front grab handle (with CODE LC3 (Illumination in rear grab handle)) (model 447.7/8)
- Dome lamp in right front grab handle (with CODE LC3 (Illumination in rear grab handle)) (model 447.7/8)
- Dome lamp in left rear grab handle (with CODE LC3 (Illumination in rear grab handle)) (model 447.7/8)
- Dome lamp in right rear grab handle (with CODE LC3 (Illumination in rear grab handle)) (model 447.7/8)
- Right sliding door step illumination (model 447.8, 448.8)
- Right front footwell lamp (model 447.8, 448.8)
- Right front footwell lamp (with CODE LC7 (Illumination for front footwell)) (model 447.6/7, 448.7/8)
- Left front footwell lamp (model 447.8)
- Left front footwell lamp (with CODE LC7 (Illumination for front footwell)) (model 447.6/7, 448.7/8)
- Left B-pillar footwell lamp (model 447.8, 448.8)
- Right B-pillar footwell lamp (model 447.8, 448.8)
- Left C-pillar footwell lamp (model 447.8, 448.8)
- Right C-pillar footwell lamp (model 447.8, 448.8)
- Right front illuminated door sill molding (with CODE LC1 (Ambiance illumination)) (model 447.8, 448.8)
When the central locking is unlocked, all lamps are switched off after expiration of t = 40 s or immediately if the vehicle is locked again within t = 3 s after unlocking it.
Additional function requirement for orientation lighting
- Automatic interior lights switched on using the interior lamp automatic function button
The overhead control panel (OCP) control unit reads in the status of the interior lamp automatic function button directly and transmits this via the roof LIN to the signal acquisition and actuation module (SAM) control unit.
Function sequence for orientation lighting
With the switching off of circuit 15C, the signal acquisition and actuation module (SAM) control unit activates the orientation lighting.
The circuit 15 status is transmitted by the electronic ignition lock unit (EZS) control unit via the interior CAN to the signal acquisition and actuation module (SAM) control unit. The signal acquisition and actuation module (SAM) control unit then transmits the request to switch on the IBL via the roof LIN to the overhead control panel (OCP) control unit.
The overhead control panel (OCP) control unit then actuates the following components directly:
- Front interior lamp
- Center trunk lamp (model 447.8, 448.8)
- Ambiance illumination in left front grab handle (with CODE LC6 (Illumination in rear grab handle with reading spotlight)) (model 447.7/8, 448.7/8)
- Ambiance illumination in right front grab handle (with CODE LC6 (Illumination in rear grab handle with reading spotlight)) (model 447.7/8, 448.7/8)
- Ambiance illumination in left rear grab handle (with CODE LC6 (Illumination in rear grab handle with reading spotlight)) (model 447.7/8, 448.7/8)
- Ambiance illumination in right rear grab handle (with CODE LC6 (Illumination in rear grab handle with reading spotlight)) (model 447.7/8, 448.7/8)
The signal acquisition and actuation module (SAM) control unit also actuates the request to switch on the following components directly:
- Dome lamp in left front grab handle (with CODE LC3 (Illumination in rear grab handle))
- Dome lamp in right front grab handle (with CODE LC3 (Illumination in rear grab handle)) (model 447.7/8)
- Dome lamp in left rear grab handle (with CODE LC3 (Illumination in rear grab handle)) (model 447.7/8)
- Dome lamp in right rear grab handle (with CODE LC3 (Illumination in rear grab handle)) (model 447.7/8)
- Right sliding door step illumination (model 447.8, 448.8)
- Right front footwell lamp (model 447.8, 448.8)
- Right front footwell lamp (with CODE LC7 (Illumination for front footwell)) (model 447.6/7, 448.7/8)
- Left front footwell lamp (model 447.8)
- Left front footwell lamp (with CODE LC7 (Illumination for front footwell)) (model 447.6/7, 448.7/8)
- Left B-pillar footwell lamp (model 447.8, 448.8)
- Right B-pillar footwell lamp (model 447.8, 448.8)
- Left C-pillar footwell lamp (model 447.8, 448.8)
- Right C-pillar footwell lamp (model 447.8, 448.8)
- Right front illuminated door sill molding (with CODE LC1 (Ambiance illumination)) (model 447.8, 448.8)
When the vehicle doors are closed, all lights that are switched on are switched off once the OFF delay time has expired.
Model 447.8, 448.8
The OFF delay time can be switched on or off via the "Settings" menu in the radio (Audio/COMAND). The radio (Audio/COMAND) transmits the relevant selection via the user interface CAN, the gateway for user interface CAN and the interior CAN to the signal acquisition and actuation module (SAM) control unit.
Model 447.6/7, 448.7
The OFF delay time can be switched on or off via the "Settings" menu in the instrument cluster (IC [KI]) control unit. The respective selection is sent by the instrument cluster (IC [KI]) control unit via interior CAN to the signal acquisition and actuation module (SAM) control unit.
Additional function requirements for warning and exit illumination
- Automatic interior lights switched on using the interior lamp automatic function button
The overhead control panel (OCP) control unit reads in the status of the interior lamp automatic function button directly and transmits this via the roof LIN to the signal acquisition and actuation module (SAM) control unit.
Function sequence for warning and exit illumination
When a vehicle door is opened, the signal acquisition and actuation module (SAM) control unit activates the warning and exit illumination.
The front door control units transmit the status of the front doors (open or closed) to the signal acquisition and actuation module (SAM) control unit via the interior CAN.
The sliding door control units send the status of the sliding doors (open or closed) (with CODE T55 (Electrical actuation for right sliding door) or with CODE T56 (Electrical actuation for left sliding door)) (model 447.7/8, 448.8) via interior CAN to the signal acquisition and actuation module (SAM) control unit.
The signal acquisition and actuation module (SAM) control unit receives the status of the left sliding door (open or closed) (with CODE T19 (Left sliding door) and without CODE T56 (Electrical actuation for left sliding door)) from the mechanical left sliding door central locking actuator.
The signal acquisition and actuation module (SAM) control unit receives the status of the right sliding door (open or closed) (without CODE T55 (Electric operation for right sliding door)) from the mechanical right sliding door central locking actuator.
The signal acquisition and actuation module (SAM) control unit evaluates all incoming information and transmits the request to switch on the IBL via the roof LIN to the overhead control panel (OCP) control unit.
The overhead control panel (OCP) control unit actuates the following components directly:
- Front interior lamp
- Center trunk lamp (model 447.8, 448.8)
- Ambiance illumination in left front grab handle (with CODE LC6 (Illumination in rear grab handle with reading spotlight)) (model 447.7/8, 448.7/8)
- Ambiance illumination in right front grab handle (with CODE LC6 (Illumination in rear grab handle with reading spotlight)) (model 447.7/8, 448.7/8)
- Ambiance illumination in left rear grab handle (with CODE LC6 (Illumination in rear grab handle with reading spotlight)) (model 447.7/8, 448.7/8)
- Ambiance illumination in right rear grab handle (with CODE LC6 (Illumination in rear grab handle with reading spotlight)) (model 447.7/8, 448.7/8)
The signal acquisition and actuation module (SAM) control unit also transmits the request to switch on the warning and exit illumination to the following control units:
- Left front door control unit
- Right front door control unit
- Right sliding door control unit (E-LSTR) (with CODE T55 (Electrical actuation for right sliding door)) (model 447.7/8, 448.7/8)
- Left sliding door control unit (E-LSTL) (with CODE T56 (Electrical actuation for left sliding door)) (model 447.7/8, 448.7/8)
Depending on which vehicle doors were opened, the following components of the warning and exit illumination are actuated:
- Left exit and warning lamp by the left front door control unit
- Right exit and warning lamp by the right front door control unit
- Right sliding door step illumination (model 447.8, 448.8) by the signal acquisition and actuation module (SAM) control unit
The signal acquisition and actuation module (SAM) control unit also actuates the following footwell illumination components directly:
- Right front footwell lamp (model 447.8)
- Right front footwell lamp (with CODE LC7 (Illumination for front footwell)) (model 447.6/7, 448.7/8)
- Left front footwell lamp (model 447.8)
- Left front footwell lamp (with CODE LC7 (Illumination for front footwell)) (model 447.6/7, 448.7/8)
- Left B-pillar footwell lamp (model 447.8, 448.8)
- Right B-pillar footwell lamp (model 447.8, 448.8)
- Left C-pillar footwell lamp (model 447.8, 448.8)
- Right C-pillar footwell lamp (model 447.8, 448.8)
Model 447.8, 448.8
The signal acquisition and actuation module (SAM) control unit also actuates the following entrance illumination components directly in vehicles with CODE LC1 (Ambiance illumination):
- Left front illuminated door sill molding
- Right front illuminated door sill molding
- Left sliding door illuminated door sill molding (with CODE T19 (Left sliding door) or with CODE T56 (Electrical actuation for left sliding door))
- Right sliding door illuminated door sill molding
The illuminated door sill moldings are actuated with different maximum values depending on the ambient brightness. The ambient brightness is detected by the light sensor. The humidity sensor/light sensor/rain sensor (with CODE HH9 (Semi-automatically controlled air conditioning, TEMPMATIC)) or the humidity sensor/light sensor/rain sensor/sun sensor (with CODE HH4 (THERMOTRONIC automatic climate control)) directly reads in the signals from the light sensor, evaluates them and sends information on the ambient brightness (twilight level) via roof LIN to the signal acquisition and actuation module (SAM) control unit.
To preserve the on-board electrical system battery (G1), with "circuit 15 OFF" all of the activated lamps are switched off after t = 5 min when a vehicle door is opened and t = 8 s after the closing of the last vehicle door.
Additional function requirement for trunk illumination
- Vehicle stationary
A stationary vehicle is defined via the vehicle speed. The Electronic Stability Program (ESP) control unit transmits the vehicle speed via the chassis CAN, the electronic ignition lock (EZS) control unit and the interior CAN to the signal acquisition and actuation module (SAM) control unit.
Function sequence for trunk illumination
When the liftgate is opened, the signal acquisition and actuation module (SAM) control unit activates the trunk illumination.
The signal acquisition and actuation module (SAM) control unit receives the status of the liftgate (open or closed) (without CODE W68 (EASY-PACK liftgate) and without CODE T55 (Electrical actuation for right sliding door)) from the liftgate opening assist.
The signal acquisition and actuation module (SAM) control unit receives the status of the liftgate (open or closed) (with CODE T55 (Electrical actuation for right sliding door) and with or without CODE W68 (EASY-PACK liftgate)) from the right sliding door control unit (E-LSTR).
The signal acquisition and actuation module (SAM) control unit actuates the following components directly:
- Center trunk lamp (model 447.8, 448.8)
- Left luggage compartment lamp
- Liftgate ambient illumination 1
- Load compartment work lamp LED light strip (with CODE LC2 (LED light strip in load compartment)) (model 447.6/7)
After closing the liftgate all switched-on lights are switched off again.
To preserve the on-board electrical system battery, all lights that are on when the liftgate is opened and "circuit 15 OFF" are switched off after t = 5 minutes.
Function sequence for IBL with ATA alarm (with CODE FZ5 (Anti-theft alarm system) or with CODE FY1 (Theft protection package))
Immediately after triggering an ATA alarm, the signal acquisition and actuation module (SAM) control unit activates the following functions of the IBL:
- Locator lighting
The locator lighting function is described in Section "Function sequence for locator lighting".
- Search and symbol illumination
The search and symbol illumination function is described in a separate document called "Symbol and ambiance illumination function".
- Ambiance illumination (with CODE LC1 (Ambiance illumination))
The ambiance illumination function is described in the separate "Symbol and ambiance illumination function" document.
Detailed information on triggering an ATA [EDW] alarm is described in the separate "Function description for theft protection and locking" function description.
Additional function requirement for IBL after an accident
- Vehicle stationary
A stationary vehicle is defined via the vehicle speed. The Electronic Stability Program (ESP) control unit transmits the vehicle speed via the chassis CAN, the electronic ignition lock (EZS) control unit and the interior CAN to the signal acquisition and actuation module (SAM) control unit.
Function sequence for IBL after accident
The signal acquisition and actuation module (SAM) control unit activates the IBL after an accident with airbag deployment.
Actuation of the IBL provides better orientation for the occupants and the first aiders after an accident.
If the supplemental restraint system (SRS) control unit detects an accident, it transmits the crash signal via the chassis CAN, the electronic ignition lock (EZS) control unit and the interior CAN to the signal acquisition and actuation module (SAM) control unit.
The signal acquisition and actuation module (SAM) control unit also detects a crash by evaluating the signals of the integrated crash sensor.
The signal acquisition and actuation module (SAM) control unit evaluates all incoming information and activates the following functions of the IBL:
- Locator lighting
The locator lighting function is described in Section "Function sequence for locator lighting".
- Search and symbol illumination
The search and symbol illumination function is described in a separate document called "Symbol and ambiance illumination function".
- Ambiance illumination (with CODE LC1 (Ambiance illumination))
The ambiance illumination function is described in the separate "Symbol and ambiance illumination function" document.
| Automatic interior lights control electrical function schematic | Model 448.8 | PE82.20-S-2052-97VDA | |
| Model 448.7 | PE82.20-S-2052-97VDB | ||
| Model 447.8 except code ZK7 (Equipment line MARCO POLO) | PE82.20-S-2052-97TRA | ||
| Model 447.6 Model 447.7 except code ZH6 (Marco Polo ACTIVITY) | PE82.20-S-2052-97TRB | ||
| Overview of interior illumination (IBL) system components | GF82.20-S-9997TRA |