Structure and inner electrical connection
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The roof function center, High version, is connected to the vehicle electrical system via 5 plug connections.
The LIN bus connects the FZD control unit with the siren and tilt sensor.
The roof function center (FZD) is a bus user at K-CAN2.
The power distribution box in the junction box or the power distribution box at the front right supplies the roof function center (FZD) with permanent positive.
| Item | Explanation |
|---|---|
| 1 | Left-side reading light |
| 2 | Left-side ambient light |
| 3 | Interior light |
| 4 | Right-side ambient light |
| 5 | Reading light, right |
| 6 | Indicator lamp for front passenger airbag deactivation |
| 7 | Button for right-hand reading light with locator lighting |
| 8 | Ultrasonic interior movement detector (USIS) with ultrasonic interior sensors |
| 9 | FZD control unit |
| 10 | Sliding/tilting sunroof switch |
| 11 | Electronic component |
| 12 | SOS button with emergency call LED |
| 13 | Button for left-hand reading light with locator lighting |
| 14 | Interior light button with locator lighting |
Pin assignments
The graphic above shows only the supply and bus connection. The current pin assignment is recorded on the wiring diagrams in the ISTA diagnosis system (Integrated Service Technical Application). Click on the component code in the wiring diagram to activate the "Installation location" and "Pin assignment" tabs.