Automatic Interior Lights Control, Function - GF82.20-P-2200RF
Model 205
up to model year 2019
Model 253 (except 253.99)
up to model year 2020
Function requirements, general
- No overvoltage or undervoltage
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 front 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/load compartment illumination
- Function sequence for interior illumination for ATA [EDW] alarm (with CODE 551 (Anti-theft alarm system (ATA [EDW])))
- Function sequence for interior illumination after an accident
Additional function requirement for locator lighting
- Automatic interior lights switched on using the interior lamp automatic function button
The overhead control panel control unit directly reads in the status of the interior lamp automatic function button and transmits it to the front SAM control unit via the roof LIN.
Locator lighting function sequence
When unlocking the vehicle via radio, the front SAM control unit activates the locator lighting.
The electronic ignition lock control unit sends the status of the central locking (CL [ZV]) to the front SAM control unit via interior CAN. The front SAM control unit then sends the request to switch on the interior illumination via the roof LIN to the overhead control panel control unit.
The overhead control panel control unit then actuates the following components directly:
- Left reading lamp in inside rear-view mirror
- Right reading lamp in inside rear-view mirror
- Front dome lamp (Model 205.0/1/2/3, Model 253)
- Left interior/reading lamp (Model 205.4)
- Right interior/reading lamp (Model 205.4)
- Left rear interior lamp in left rear dome lamp (Model 205.0/1/2, Model 253)
- Right rear interior lamp in right rear dome lamp (Model 205.0/1/2, Model 253)
- Rear dome lamp (Model 205.3 with CODE 876 (Interior lights package))
- Left rear vanity mirror dome lamp in left rear vanity mirror unit (Model 205.1)
- Right rear vanity mirror dome lamp in right rear vanity mirror unit (Model 205.1)
If the ambient illumination function is activated through the instrument cluster, 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.
In vehicles with CODE 876 (Interior lights package), the front SAM control unit directly actuates the following components:
- Right front footwell lamp
- Left front footwell lamp
- Left rear footwell lamp
- Right rear footwell lamp
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 control unit directly reads in the status of the interior lamp automatic function button and transmits it to the front SAM control unit via the roof LIN.
Function sequence for orientation lighting
When circuit 15C is switched off, the front SAM control unit activates the orientation lighting.
The electronic ignition lock control unit sends the status of circuit 15 to the front SAM control unit via the interior CAN. The front SAM control unit then sends the request to switch on the interior illumination via the roof LIN to the overhead control panel control unit.
The overhead control panel control unit then actuates the following components directly:
- Left reading lamp
- Right reading lamp
- Front dome lamp (Model 205.0/1/2/3, Model 253)
- Left interior/reading lamp (Model 205.4)
- Right interior/reading lamp (Model 205.4)
- Left rear interior lamp (Model 205.0/1/2, Model 253)
- Right rear interior lamp (Model 205.0/1/2, Model 253)
- Rear dome lamp (Model 205.3 with CODE 876 (Interior lights package))
- Left rear vanity mirror dome lamp (Model 205.1)
- Right rear vanity mirror dome lamp (Model 205.1)
In vehicles with CODE 876 (Interior lights package), the front SAM control unit directly actuates the following components:
- Right front footwell lamp
- Left front footwell lamp
- Left rear footwell lamp
- Right rear footwell lamp
When the vehicle doors are closed, all lights that are switched on are switched off once the OFF delay time has expired. The OFF delay time can be switched on or off using the "Settings" menu in the head unit. The corresponding selection is sent by the head unit via user interface CAN, electronic ignition lock control unit and interior CAN to the front 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 control unit directly reads in the status of the interior lamp automatic function button and transmits it to the front SAM control unit via the roof LIN.
Function sequence for warning and exit illumination
When a vehicle door is opened, the front SAM control unit activates the warning and exit illumination.
The front door control unit transmit the status of the front doors (open or closed) to the front SAM control unit via interior CAN.
The status of the rear doors (Model 205.0/1/2, Model 253) (open or closed) is sent by the rear door control units via the interior CAN to the front SAM control unit.
The front SAM control unit evaluates all incoming information and sends the request to switch on the interior illumination to the overhead control panel control unit via the roof LIN.
The overhead control panel control unit actuates the following components directly:
- Left reading lamp
- Right reading lamp
- Front dome lamp (Model 205.0/1/2/3, Model 253)
- Left interior/reading lamp (Model 205.4)
- Right interior/reading lamp (Model 205.4)
- Left rear interior lamp (Model 205.0/1/2, Model 253)
- Right rear interior lamp (Model 205.0/1/2, Model 253)
- Left rear vanity mirror dome lamp (Model 205.1)
- Right rear vanity mirror dome lamp (Model 205.1)
In vehicles with CODE 876 (Interior lights package), the front SAM control unit additionally sends the request to switch on the warning and exit illumination to the following control units via interior CAN:
- Left front door control unit
- Right front door control unit
- Left rear door control unit (Model 205.0/1/2.253)
- Right rear door control unit (Model 205.0/1/2, Model 253)
Depending on which vehicle doors were opened, the following components of the warning and exit illumination are actuated:
- Left front door exit and warning lamp by the left front door control unit
- Right front door exit and warning lamp by the right front door control unit
- Left rear door exit and warning lamp from left rear door control unit (Model 205.0/1/2, Model 253)
- Right rear door exit and warning lamp from right rear door control unit (Model 205.0/1/2, Model 253)
In vehicles with CODE 876 (Interior lights package), the front SAM control unit also directly actuates the following components of the footwell illumination:
- Right front footwell lamp
- Left front footwell lamp
- Left rear footwell lamp
- Right rear footwell lamp
In vehicles with CODE 877 (Ambiance illumination), the front SAM control unit directly actuates the following components of the entrance illumination:
- Left front illuminated door sill molding
- Right front illuminated door sill molding
- Left rear illuminated door sill molding (Model 205.1)
- Right rear illuminated door sill molding (Model 205.1)
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 rain/light sensor with additional functions reads in the signals of the light sensor directly, evaluates them and transmits information about the ambient brightness (dimness level) via the rain/light sensor LIN to the front SAM control unit.
To preserve the on-board electrical system battery (G1), with circuit 15 Off all the activated lamps are switched off after t = 5 min. when a vehicle door is open and t = 8 s after the closing of the last vehicle door.
Additional function requirements for trunk/load compartment illumination
- Vehicle stationary
A stationary vehicle is defined via the vehicle speed. The instrument cluster sends the vehicle speed to the front SAM control unit over the user interface CAN (CAN HMI), electronic ignition lock control unit and interior CAN.
Function sequence for trunk/load compartment illumination
When opening the trunk lid or liftgate, the front SAM control unit activates the trunk/cargo area illumination.
The rear SAM control unit transmits the status of the trunk lid or the liftgate via interior CAN to the front SAM control unit. The front SAM control unit then transmits the request to switch on the trunk/load compartment illumination via interior CAN to the rear SAM control unit.
The rear SAM control unit actuates the following components directly:
- Right luggage compartment lamp
- Left luggage compartment lamp
- Left trunk lid/liftgate ambient lamp and warning lamp
- Right trunk lid/liftgate ambient lamp and warning lamp (Model 205.2, Model 253)
After closing the trunk lid or the liftgate, all switched on lights are switched off again.
To preserve the on-board electrical system battery, all the lights that were switched on with the trunk lid or the liftgate open and circuit 15 OFF are switched off after t = 5 min.
Function sequence for interior illumination for ATA [EDW] alarm (with CODE 551 (Anti-theft alarm system (ATA [EDW])))
Immediately after triggering an ATA [EDW] alarm, the front SAM control unit activates the following interior illumination functions:
- Locator lighting
- Search and symbol illumination
- Ambiance illumination (with CODE 877 (Ambiance illumination))
Additional function requirement for interior illumination after an accident
- Vehicle stationary
A stationary vehicle is defined via the vehicle speed. The instrument cluster sends the vehicle speed to the front SAM control unit over the user interface CAN (CAN HMI), electronic ignition lock control unit and interior CAN.
Function sequence for interior illumination after an accident
After an accident with airbag deployment, the front SAM control unit activates the interior illumination.
The interior illumination is actuated in order to provide better orientation for the vehicle occupants and the first aiders following an accident.
If the supplemental restraint system control unit recognizes an accident event, its sends the crash signal to the front SAM control unit over the user interface CAN, electronic ignition lock control unit and interior CAN.
The front SAM control unit additionally recognizes a crash event by evaluating the signals of the integrated crash sensor.
The front SAM control unit evaluates all incoming information and activates the following interior illumination functions:
- Locator lighting
- Search and symbol illumination
- Ambiance illumination (with CODE 877 (Ambiance illumination))
| Automatic interior lights control electrical function schematic | PE82.20-P-2052-97FBA | ||
| Overview of interior illumination (IBL) system components | GF82.20-P-9997RF |