GF82.20-P-2200CWA Automatic Interior Lights Control, Function

GF82.20-P-2200CWA Automatic Interior Lights Control, Function
- with CODE (414) Power glass tilting/sliding roof

Function requirements for automatic interior lights control, general
^ No overvoltage or undervoltage
^ Circuit 30

Automatic interior lights control, general
The automatic interior lights control implements the actuation of all components of the interior illumination as well as the warning and exit illumination.
The corresponding requests are generated automatically. The master control unit for the automatic interior lights control is the front SAM control unit with fuse and relay module (N10/1).

The automatic interior lights control feature comprises the following subfunctions:
^ Locator lighting function sequence
^ Function sequence for warning and exit illumination
^ Function sequence for load compartment illumination
^ Function sequence for interior illumination with ATA [EDW] alarm (with code (551) Antitheft alarm system (ATA [EDW]))
^ Function sequence for interior illumination following an accident with airbag deployment

Additional function requirements for locator lighting
^ Light sensor (B38/1) (without code (345) Rain sensor) or rain/light sensor (B38/2) (with code (345) Rain sensor) signaling darkness
^ Vehicle unlocking using the central locking or
^ intentionally leaving the vehicle by removing the transmitter key (A8/1) from the electronic ignition lock control unit (N73)

Locator lighting function sequence
The following signals are read in and evaluated by the front SAM control unit for controlling the locator lighting feature:
- Light sensor or rain/light sensor status via the wiper/inside rearview mirror LIN
- Central locking status and circuit 15 circuit status via the interior CAN, supplied by the electronic ignition lock control unit

The overhead control panel control unit (N70) receives the switch-on request from the front SAM control unit via the interior CAN and actuates the following components:
- Left front interior lamp (N70e4)
- Right front interior lamp (N70e5)
- Rear interior lamp (E15/3e3)

Furthermore, the front SAM control unit on vehicles with code (954) Avantgarde, with code (955) Elegance actuates the following components in accordance with the set brightness value for the symbol illumination:
- right front footwell lamp (E17/15)
- left front footwell lamp (E17/16)

If the function is requested by intentionally leaving the vehicle, all the lamps are switched off after t = 15 s.

If the function is requested by unlocking the central locking, all the lamps are switched off after t = 40 s or immediately if the vehicle is locked again within t = 3 s of unlocking it.
The duration of the OFF delay time is adjustable and is supplied to the front SAM control unit by the instrument cluster (A1) via the interior CAN.

Additional function requirements for warning and exit illumination
^ Light sensor or rain/light sensor signals darkness
^ Opening a vehicle door

Function sequence for warning and exit illumination
The following signals are read in and evaluated by the front SAM control unit for controlling the warning and exit illumination:
- Light sensor or rain/light sensor status via the wiper/inside rearview mirror LIN
- Status of left front door rotary tumbler switch (A85s1) via the interior CAN, supplied by the left front door control unit (N69/1)
- Status of right front door rotary tumbler switch (A85/1s1) via the interior CAN, supplied by the right front door control unit (N69/2)
- Status of the left rear door rotary tumbler switch (A85/3s1) and right rear door rotary tumbler switch (A85/4s1) via the interior CAN, supplied by the rear SAM control unit with fuse and relay module (N10/2)

The front SAM control unit transmits the request to switch on the warning and exit illumination as well as the interior illumination via the interior CAN to the following control units:
- Overhead control panel control unit
- Left front door control unit
- Right front door control unit
- Left rear door control unit (N69/3)
- Right rear door control unit (N69/4)

The following components of the warning and exit illumination are actuated directly according to the door status:
- Left front door exit and warning lamp (E17/3) by the left front door control unit
- Right front door exit and warning lamp (E17/4) by the right front door control unit
- Left rear door exit and warning lamp (E17/5) by the left rear door control unit
- Right rear door exit and warning lamp (E17/6) by the right rear door control unit

The overhead control panel control unit receives the switch-on request from the front SAM control unit via the interior CAN and actuates the following components corresponding to the status of the interior lamp automatic function switch (N70s3):
- Left front interior lamp
- Right front interior lamp
- Rear interior lamp

Furthermore, all the footwell lamps are actuated by the front SAM control unit at a brightness value of 100 %.
If all the vehicle doors are closed again and the circuit status circuit 15 On has been supplied by the electronic ignition lock control unit on the interior CAN, then the interior lights are switched off.
The footwell lamps are then actuated again at the set brightness value for the symbol illumination.

To preserve the on-board electrical system battery (G1), with the circuit status 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 load compartment illumination
^ Trunk lid (model 204.0) or liftgate (model 204.2) open

Function sequence for load compartment illumination
The following signal is read in and evaluated by the front SAM control unit for controlling the load compartment illumination:
- Status of trunk lid rotary tumbler switch (M14/7s1) (model 204.0) or trunk lid rotary tumbler switch (M14/7s1) (model 204.2) via the interior CAN, supplied by the rear SAM control unit

The front SAM control unit transmits the request to switch on the load compartment illumination via the interior CAN to the rear SAM control unit, which then actuates the following components of the load compartment illumination:
- Right trunk lamp (E18/4) (dimmed)
- Left trunk lamp (E18/5) (dimmed) (model 204.2)
- Trunk lid ambient lamp (E40) (not dimmed) (model 204.0)
- Left liftgate ambient lamp and warning lamp (E40/2) (not dimmed) (model 204.9)
- Right liftgate ambient lamp and warning lamp (E40/3) (not dimmed) (model 204.2)

To preserve the on-board electrical system battery, the ambient lamps and the luggage compartment lamps are switched off t = 10 min after the trunk lid or liftgate was opened.

The status of the front doors is supplied to the rear SAM control unit by the front door control units and the current circuit 15 circuit status is supplied on the interior CAN by the electronic ignition lock control unit, so that the load compartment illumination can be activated again at the end of a journey with the trunk lid or liftgate open.
The ambient lamps and the trunk lamps are switched off after the trunk lid or the liftgate is closed.

Additional function requirements for interior illumination with ATA [EDW] alarm
^ ATA [EDW] alarm activated

Function sequence for interior illumination with ATA [EDW] alarm
The rear SAM control unit transmits the "ATA [EDW] alarm triggered" signal to the interior CAN.
The front SAM control unit receives this signal, generates from it the request to switch on the interior illumination and places this on the interior CAN.

The overhead control panel control unit receives the switch-on request from the front SAM control unit via the interior CAN and actuates the following components:
- Left front interior lamp
- Right front interior lamp
- Rear interior lamp

Furthermore, the front SAM control unit actuates the footwell illumination.

Additional function requirements for interior illumination following an accident with airbag deployment
^ Airbag deployment by supplemental restraint system control unit (N2/10) or
^ crash detection by the crash sensor integrated into the front SAM control unit
^ Vehicle stationary

Function sequence for interior illumination following an accident with airbag deployment
The interior illumination is actuated in order to provide better orientation for the occupants and the first aiders following an accident. The supplemental restraint system control unit places the "Crash event" information on the chassis CAN.
The front SAM control unit receives this information, evaluates it and transmits the request to switch on the interior illumination to the interior CAN.

The overhead control panel control unit receives the switch-on request from the front SAM control unit and actuates the following components:
- Left front interior lamp
- Right front interior lamp
- Rear interior lamp

Furthermore, the front SAM control unit actuates the footwell illumination.

The interior illumination function following an accident with airbag deployment is deactivated under the following conditions:
- Hazard warning flasher switch (S6/1s1) operated
- Unlocking of central locking
- Change in circuit status from circuit 15R to circuit 15 On
- Opening a vehicle door