GF82.20-P-2019S Switching on/Off Front Dome Lamp, Function

GF82.20-P-2019S Switching On/Off Front Dome Lamp, Function







Manually switching on and off front dome lamp:
The front dome lamp (N17e1) is faded on when the interior lamp ON and OFF switch (N70s4) in the overhead control panel control module (N70) is actuated.

The front dome lamp is faded off by turning the switch to the original position or automatically after 30 minutes when no signals are presents on the bus to protect the battery.

If the lamp is switched on, none of the automatic features manually described below are performed.

Prerequisites for automatic features
- automatic driving light circuit switched on on instrument cluster (A1) and
- door contact ON and OFF switch (N70s3) switched on switch in center position) and
- light sensor has recognized night or:
- automatic driving light circuit switched off on instrument cluster (A1) and
- door contact ON and OFF switch (N70s3) switched on (switch in center position)

Automatic features for front dome lamp
- When one of the front doors is opened the front door lamp (N17e1) is faded on.
Switch-off is accomplished:
- with c.15 ON: lamp is faded off immediately after the last front door is closed or automatically 30 minutes after the last front door is opened.
- with c.15 OFF: front dome lamp is faded off 8 s after the last front door is closed or automatically 5 minutes after the last front door is opened.

- The front door lamp is faded on when the vehicle is. unlocked Switch-off is accomplished:
- Fade off 30 s after unlocking

- The front dome lamp (N17e1) is faded on when the ignition key is removed.
Switch-off is accomplished automatically according to the interior light shut-off delay time set on the instrument cluster (A1) (possible settings are 0 s, 5 s, 10 s, 15 s, and 20 s.)
- If c.15 is switched on while the automatic light feature is active; the dome lamp is faded off immediately.
- If the prerequisites (door contact ON/OFF switch position or light sensor information) change during performance of an automatic feature, the change is read in.
Example:
If the dome lamp is switched on because one of the front doors is open and the light sensor information changes from "night" to "day", the dome lamp is faded off immediately. (Prerequisites: automatic driving light circuit switched on!)

ATA and taxi emergency alarm
The lamp is switched on immediately without the fade on function in the event of an ATA or taxi-emergency alarm.

Actuation
The actuation of the lamp is accomplished internally in the overhead control panel control module (N70) in which the lamp and rocker switch is integrated.

For this purpose the overhead control panel control module receives the following information:
- Brightness; for this purpose the automatic light switch daylight sensor (B32/1) is read in directly by the overhead control panel control module (N70),
- the status of the front door contact switch (S17/3 and S17/4); are read in by the rear SAM control module (N10/8) and relayed on via the CAN bus (passenger compartment)
- the set interior light shut-off delay; this is relayed to the overhead control panel control module by the instrument cluster (A1) via the CAN bus (passenger compartment).

Voltage too high/too low
If the voltage is too low the lamp is switched off immediately without fade-out. When the correct voltage returns the lamp is switched back on without fade-on.

In the event of an ATA or taxi emergency alarm the light is not switched off when the voltage is too high/too low.