General Electrical System - Service Information: Overview BMW X3 E83 рестайлинг

Brief description of components

The following components deliver signals for the digital compass

1. Magnetic field sensor > up to 09/2006 The magnetic field sensor is installed in the mirror base. The magnetic field sensor measures the current alignment of the magnetic field. The signal is sent to the control electronics for the compass in the interior mirror. > from 09/2006 The magnetic field sensor is on the PCB in the interior mirror.
2. Control electronics for the compass The interior mirror is electrically connected to the roof control panel (FZD). The control electronics for the compass are integrated into the board for the interior mirror. The signals from the magnetic field sensor are received by the control electronics. The LCD display is activated directly by the control electronics.

The following components are controlled

1. Display in interior mirror > up to 09/2006 The LC display (window) is situated at top right in the interior mirror. The points of the compass are presented digitally on the LCD display (LCD: Liquid Crystal Display). The display is divided into eight compass points. > from 09/2006 The point of the compass is displayed in transparent light technology in the interior mirror as well. The display is likewise situated at top right in the interior mirror. The display is divided into 8 points of the compass.

The following components supply the input signals for the Panorama glass sunroof

1. Panorama glass sunroof switch The switch is located in the control unit in the roof console. The switch can be moved in 3 directions (pushed forwards, pushed backwards, pushed upwards).
2. Hall sensors in Panorama glass sunroof drive There are 2 Hall sensors integrated in each of the two electric motors for the Panorama glass sunroof. The Hall sensors detect the motor speed. The signals are forwarded to the SHD control unit. These signals enable the control unit to recognize the position of the two glass sunroofs and of the 2-piece sliding visor. Moreover, the closing speed of each electric motor is used to calculate the closing force for the two glass sunroofs and for the sliding visor.

The control units involved in the functions of the Panorama glass sunroof are as follows

1. SHD control unit (control unit for Panorama glass sunroof) The SHD control unit controls all the electrical functions of the Panorama glass sunroof.
2. GM: General module 3 (E53) or general module 5 (E83) The general module controls the convenience opening or closing function of the Panorama glass sunroof. The general module forwards the request (from the remote control, for example) to the SHD control unit via the body bus.
3. CAS: Car Access System (E61, E91) The CAS controls the convenience opening or closing function of the Panorama glass sunroof. The CAS forwards the request (from the remote control, for example) to the SHD control unit via the Body CAN.
4. CA: Comfort Access Option 322 "Comfort Access" allows convenience closing of the Panorama glass sunroof without actively using the ID transmitter.
5. LSZ: Light switch cluster (E53, E83) The light switch cluster sends the SHD control unit the request to switch on the locating light via the body bus (terminal 58g).
6. LM: Light module (E61) The light module sends the SHD control unit the request to switch on the locating light via the Body CAN (terminal 58g).
7. FRM: Footwell module (E91) The footwell module sends the SHD control unit the request to switch on the locating light via the Body CAN (terminal 58g).
8. FZD: Roof control panel (E91) The roof control panel picks up the signals from the switch for the Panorama glass sunroof. In addition, the FZD control unit also converts the signal into a CAN message. The CAN message is forwarded to the SHD control unit via the K-CAN.
9. KOMBI: Instrument cluster The instrument cluster sends the road speed signal to the SHD control unit. > via the K-bus (body bus) on the E53, E83 > via the K-CAN (Body CAN) on the E61, E91 The signal is needed to extend and retract the wind deflector and to adjust the closing force limitation.

The following components are actuated for the purposes of the functions of the Panorama glass sunroof

1. Panorama glass sunroof drive The drive consists of 2 DC motors with reduction gearing. One motor operates the two glass sunroofs, the other motor the sliding visor and the wind deflector.
2. Wind deflector The wind deflector is extended to reduce noises inside the vehicle when the sliding/tilting glass sunroof is open. The wind deflector automatically extends depending on the road speed.
3. 2-piece sliding visor When driving with the Panorama glass sunroof tilted ("vent" position), a suction effect develops on the 2 -piece sliding visor. This suction effect can lead to noise disturbance. > E53, E61, E83: To minimize the suction effect, the rear piece of the 2 -piece sliding visor is opened approximately 3 cm. > E91 : The 2-piece sliding visor moves back approx. 5 cm and forms an opening at the front.