BMW 7 Series: Functions

Luggage Compartment Lid Actuating Points

The luggage compartment lid can be unlocked and opened or closed from various operating points. The operating points are the:

• Outer luggage compartment lid button
• Luggage compartment lid button on the interior of the luggage compartment lid (only when the luggage compartment lid is open)
• Central double-lock button on the interior of the luggage compartment lid (only when the luggage compartment lid is open)
• Luggage compartment lid button on the identification transmitter
• Luggage compartment lid button on A-pillar in vehicle interior
• Luggage compartment lid lock barrel (mechanical unlocking).

The automatic luggage compartment lid actuating system cannot be activated when the vehicle is in motion, only when the vehicle is stationary.

Automatic luggage compartment lid actuation is controlled and monitored by a control unit. This control unit is designated luggage compartment lid lift HKL.

The HKL has an integrated "soft-opening" or "soft-closing" function. This means that the closing or opening speed is slowed shortly before the end stops are reached so that the luggage compartment lid moves softly into the respective end stop. The soft end stop is achieved by a change in the pulse width of the control voltage.

The luggage compartment lid moves quietly and smoothly. This gives the impression of a harmonious movement during the luggage compartment lid opening or closing procedure.

To achieve this, the speed of the luggage compartment lid movement is regulated by the HKL. Luggage compartment lid movement depends on whether the luggage compartment lid is covered with hoarfrost or snow.

If the weight of the snow is too heavy for the luggage compartment lid, no luggage compartment lid movement will take place.

The HKL receives signals on the K-CAN from the following control units:

• Car Access System
  • Luggage compartment lid button, A-pillar
  • Central double-lock button
  • Enable for operating luggage compartment lid or terminal status
  • Request from identification transmitter
• Integrated Chassis Management Driving speed signal
• Junction box electronics
  • Outer luggage compartment lid button
  • Luggage compartment lid button on interior of luggage compartment lid.

Operation by Luggage Compartment Lid Buttons

The luggage compartment lid can be opened, stopped or closed by pressing one of the luggage compartment lid buttons. It is also possible to stop or resume the movement of the luggage compartment lid from any open position. Tapping a luggage compartment lid button is sufficient input for the luggage compartment lid to continue to the respective end position (luggage compartment lid open or closed). The luggage compartment lid movement stops automatically as soon as the end position is reached.

Direction of luggage compartment lid movement

The direction of movement of the luggage compartment lid changes with every second press of the interior or exterior luggage compartment lid button. Initial state of luggage compartment lid closed:

• Button stroke > Open
• Button stroke > Stop
• Button stroke > Close
• Button stroke > Stop
• Button stroke > Open, etc.

Luggage compartment lid button, A-pillar

The interior luggage compartment lid button on the A-pillar can only be used to open or stop the luggage compartment lid.

• Button stroke > Open
• Button stroke > Stop
• Button stroke > Open
• Button stroke > Stop, etc.

Central double-lock button

In vehicles equipped with Comfort Access, the inner luggage compartment lid button is installed together with the central double-lock button.

Fig. 40: Identifying Inner Luggage Compartment Lid Button And Central Double-Lock Button F01/F02

The central double-lock button is connected to the Car Access System. The central double-lock button is used to lock and centrally arrest the vehicle doors. To provide maximum convenience for the customer, closing the luggage compartment lid can be initiated by pressing the central double-lock button.

The central double-lock button can only be used to close and stop the luggage compartment lid.

• Button stroke > Close
• Button stroke > Stop
• Button stroke > Close
• Button stroke > Stop, etc.

NOTE: A command sent from the central double-lock button can only be executed with the luggage compartment lid open. This is due to the fact that the button has a connection to ground via the luggage compartment lid contact switch only when the luggage compartment lid is open.

Outer luggage compartment lid button

The junction box electronics evaluate the status of the luggage compartment lid button.

Evaluation depends on whether or not the vehicle is in sleep mode. If the vehicle is in sleep mode, it will have to be woken first. Only then can the request be sent to the HKL on the K-CAN. The HKL triggers the appropriate request.

When closed, the luggage compartment lid is unlocked by the junction box electronics. The luggage compartment lid lift HKL then opens the luggage compartment lid. The luggage compartment lid is completely opened automatically.

The outer luggage compartment lid button can be used to open, stop or close the luggage compartment lid.

• Button stroke > Open *
• Button stroke > Stop
• Button stroke > Close **
• Button stroke > Stop
• Button stroke > Open
• Button stroke > Stop etc.

* Always in open direction with luggage compartment lid closed

** Always in close direction with luggage compartment lid completely open.

NOTE: Additional information on luggage compartment lid operation can be found under "Manual opening and closing".

Interior luggage compartment lid button

Parallel to the outer luggage compartment lid button, the inner luggage compartment lid button is connected to the junction box electronics. For this reason, the junction box electronics do not distinguish between the two luggage compartment lid buttons.

Fig. 41: Identifying Inner Luggage Compartment Lid Button F01/F02

NOTE: A command sent from the inner luggage compartment lid button can only be executed with the luggage compartment lid open. This is due to the fact that the button has a connection to ground via the luggage compartment lid contact switch only when the luggage compartment lid is open.

ID transmitter luggage compartment lid button

If the complete vehicle is locked, it is possible to trigger an automatic opening of the luggage compartment lid by pressing the luggage compartment lid button with the luggage compartment lid symbol. Firstly, the luggage compartment lid is unlocked. Then the luggage compartment lid begins to open automatically.

Operation of the luggage compartment lid with the identification transmitter is subject to specific legal requirements. There are differences between the European variant, the US variant and the Canadian variant.

European variant

Pressing the luggage compartment lid button with the luggage compartment lid symbol on the identification transmitter:

• Luggage compartment lid closed
  • Short press Luggage compartment lid opens to end position
  • Press and hold Luggage compartment lid opens to end position
• Luggage compartment lid open
  • Pressed and held > Luggage compartment lid closed to end or until button released.

It is possible to initiate the opening procedure by means of the luggage compartment lid button while the luggage compartment lid is closed. Releasing the luggage compartment lid button has no effect. The luggage compartment lid is opened until it is completely open. A brief press of the luggage compartment lid button while the luggage compartment lid is opening stops the opening procedure.

A long press of the luggage compartment lid button while the luggage compartment lid is opening triggers the luggage compartment lid closing procedure. The opening procedure stops first to allow the luggage compartment lid to begin closing immediately. The closing procedure ends if the luggage compartment lid button is released or the "CLOSED" position is reached.

NOTE: The Car Access System evaluates the requests from the identification transmitter. The luggage compartment lid lift receives the requests on the KCAN.

The signal must be routed through various bus systems. These bus systems are:

• LIN-bus (diversity module > CAS)
• K-CAN2 (CAS > ZGM)
• K-CAN > (ZGM > HKL).

US variant

The luggage compartment lid movement does not begin until the luggage compartment lid button has been released. The identification transmitter sends a message indicating that the luggage compartment lid button has been released. From this message, it is possible for the luggage compartment lid button stroke to be detected.

Automatic opening is initiated after the luggage compartment lid has unlocked. The luggage compartment lid is completely opened.

NOTE: The remote control cannot be used to close the luggage compartment lid on the US variant for legal reasons.

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