Exterior-light-dependent control of interior lighting, function - GF82.20-P-3003SK
MODEL 171.4
If the setting for the driving lamps in the instrument cluster (A1) is set to automatic, then some functions for the interior lights can be controlled based on the brightness of the outside ambient light.
The lighting function of the entrance and exit lamps for the left door (E17/3) and entrance and exit lamps for the right door (E17/4) is always dependent on the brightness of the outside ambient light.
Function prerequisites:
- No undervoltage or overvoltage is detected.
- Door contact ON and OFF switch (N70s3) is in position ON
- The instrument cluster (A1) is generating the "Automatic daytime driving lights function ON" CAN message
The automatic light functions depend on the rain/light sensor (B38/2). Its signals are evaluated by the overhead control panel control unit (N70). Depending on the ambient brightness, the rain/ light sensor (B38/2) produces the message "Night" or "Day". If there is a fault in the rain/light sensor (B38/2), the CAN message is set to "Night".
If the message "Circuit 58d ON" < 5 % from the day value, the automatic light function is blocked for the following components:
- Entrance and exit lamp in left door (E17/3)
- Right door entrance/exit lamp (E17/4)
- Left interior lamp (N70e4)
- Right interior lamp (N70e5)
- Left front vanity mirror illumination (E14/6)
- Right front vanity mirror illumination (E14/7)
If the message "Circuit 58d ON" > 5% of the night value, then the automatic light functions of the lamps listed above are carried out and the lamps are switched on at a switch-on request. When the doors are open, the final shutoff for the entrance and exit lamp for the left door (E17/3) and the entrance and exit lamp for the right door (E17/4) occurs upon receipt of the message "Automatic driving light function ON". This ensures that the entrance and exit lamps for both doors are switched off simultaneously.
If the door contact ON and OFF switch (N70s3) is in position "OFF", the left interior lamp (N70e4) and the right interior lamp (N70e5) are not switched on.
The following applies to the door contacts and light information:
- After receiving a "switch-on" request, the left interior lamp (N70e4) and the right interior lamp (N70e5) are switched on through the left door contact switch (S17/3) or the right door contact switch (S17/4) if the door contact ON and OFF switch (N70s3) is in position "ON" and the rain/light sensor (B38/2) is producing the "Night" message.
- If there is a change in the status of the left door contact switch (S17/3), the right door contact switch (S17/4) or the rain/light sensor (B38/2) while an automatic light function is being carried out, this change is immediately taken into consideration and when carrying out functions.
For circuit 58d, this is done by means of a pulse-width modulation (PWM) signal.
| Overhead control panel control unit, location/ task/design | GF82.20-P-4110SK |