BMW 7 Series: System Overview

Automatic Luggage Compartment Lid Actuating System Input/outputs

Fig. 38: Automatic Luggage Compartment Lid Actuating System Input/Outputs Diagram

COMPONENTS DESCRIPTION CHART

1. Outside temperature sensor
2. Instrument cluster
3. Control unit for automatic luggage compartment lid actuating system HKL
4. Lock barrel, luggage compartment lid
5. Identification transmitter
6. Dynamic Stability Control
7. Luggage compartment lid spindle
8. Interior luggage compartment lid button
9. Drive for automatic soft-close luggage compartment lid lock
10. Central locking, luggage compartment lid
11. Luggage compartment lid button, outer luggage compartment lid recessed handle
12. Car Access System
13. Luggage compartment lid button, A-pillar drive

Luggage compartment lid lift (3) controls and monitors opening or closing of the luggage compartment lid.

Opening or closing of the luggage compartment lid can be triggered by luggage compartment lid buttons (8, 11, 13). The luggage compartment lid can be unlocked and opened by purely mechanical means with the lock barrel in the luggage compartment lid (4).

The signals from the outside temperature sensor (1) and vehicle speed (6) are evaluated to determine whether the luggage compartment lid may be opened or closed in response to a press of a button.

Automatic Luggage Compartment Lid Actuating System Circuit Diagram

Fig. 39: Automatic Luggage Compartment Lid Actuating System Circuit Diagram

COMPONENTS DESCRIPTION CHART

1. Central gateway module (ZGM)
2. Footwell module (FRM)
3. Luggage compartment lid button, A-pillar
4. Car Access System (CAS)
5. Junction box electronics (JB)
6. Rear power distribution box
7. Spindle drive motor, right
8. Luggage compartment lid lift (HKL)
9. Inner luggage compartment lid button/central double-lock button
10. Outer luggage compartment lid button
11. Luggage compartment lid lock with luggage compartment lid switch/lock barrel
12. Automatic soft-close luggage compartment lid
13. Spindle drive motor, left
14. Luggage compartment lighting, underside of rear window shelf
15. Remote control receiver in diversity module

K-CAN - Body CAN
K-CAN2 - Body-CAN2
KI. 30 - Terminal 30
KI. 30B - Terminal 30, basic operation
LIN-Bus - Local Interconnect Network bus

K-CAN signals at the luggage compartment lid lift

K-CAN SIGNALS CHART

The radio signal from the identification transmitter is received by the rear window antenna. The remote control receiver in diversity module (15) forwards the signal to Car Access System (4). The Car Access System is the master control unit for the central locking function.

Once the signal has been successfully verified, the Car Access System issues a command to control the central locking in the luggage compartment lid.

The junction box electronics (5) execute the command to control the central locking in the luggage compartment lid. The junction box electronics register the status of the luggage compartment lid switch (11) for the "automatic luggage compartment lid actuation" function. The status of the luggage compartment lid switch is sent on the K-CAN to the luggage compartment lid lift (8). The status is one of the triggering criteria for luggage compartment lid operation.

Sensors (13 and 7) in the spindle drives monitor the movement of the luggage compartment lid. The luggage compartment lid lift is therefore able to reverse the closing movement of an obstructed luggage compartment lid, allowing the obstruction to be freed.

An obstruction to luggage compartment lid movement during the opening procedure causes the luggage compartment lid to stop and it is not reversed.

As a backup to the Hall sensors, the luggage compartment lid lift monitors the power consumption of the spindle drive. An increase in current when the luggage compartment lid blocks causes the luggage compartment lid to stop and, if need be, reverse.

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