BMW 7 Series: Display And Control Concept

The lane departure warning can be switched on as of terminal 15 ON.

When the ignition is switched on, the lane departure warning system always reverts to the state that was active when the vehicle was last switched off.

Provided lanes can be detected, the lane departure warning is "primed" (ready) above a speed of 40 mph.

Lane departure warning displays

Fig. 114: Display System Active On Screen

Fig. 115: Display System Ready On Screen

If the lane departure warning is switched on at speeds of under 40 mph, a message will appear in the instrument cluster for 3 seconds indicating availability above a speed of 40 mph.

Fig. 116: Display Availability Of Lane Departure Warning Above 44Mph

In vehicles equipped with a combination of the lane departure warning and Active Cruise Control with Stop&Go, the displays of each of these systems are also combined.

Fig. 117: Displays Of Lane Departure Warning With ACC On Screen

Displays of the lane departure warning/Active Cruise Control with Stop&Go

The graphics indicating system active and system ready are displayed in the instrument cluster and also in the head-up display, if the vehicle is equipped with this option.

INSTRUMENT CLUSTER WARNING DISPLAY REFERENCE CHART

1. Lane departure warning ready
2. Speed Limit Information (Not for US)

Fig. 118: Display Lane Departure Warning And Speed Limit Information On Screen

Fig. 119: Display Head-Up Display Of F01/F02

The driver can activate or deactivate the display for the lane departure warning in the head-up display from the Central Information Display using the controller.

Warning

The active system is ready whenever the prerequisites for a lane departure warning have been fulfilled: Lane detected and V > 40 mph.

If the vehicle threatens to drive over the lane marking, the system warns the driver by causing the steering wheel to vibrate.

Based on the detection of one or two lanes, the system first calculates the position of the vehicle in relation to these lanes.

Using the vehicle's steering angle and road speed, the system calculates the time (t) remaining before the vehicle would cross the lane marking.

The warning is output in time before the vehicle crosses the marking.

Fig. 120: Lane Departure Warning Vibration Actuator On Steering Wheel

Fig. 121: Identifying F01/F02 Lane Departure Warning

A warning is output only once on approach to a roadway marking. The warning lasts a maximum of 2.5s. No more warnings are output if the vehicle then continues to drive along the lane marking.

A new warning can only be issued if the vehicle has been steered back into the lane or the vehicle has completed a change of lane.

No warning is given if the control unit has received an input signal indicating the activation of the turn signals because this signal announces that the driver is about to change lane intentionally.

Similarly, no warning is given if the hazard warning lights are switched on.

The warning ends when:

• The driver steers back into the lane
• A lane change is completed
• The vehicle drives along the line for longer than 2.5 seconds
• The turn signal is operated to indicate a change of lane
• The brake pedal is depressed with force (brake-pressure-dependent).

ACTIVATION/DEACTIVATION THRESHOLD REFERENCE CHART

Signal path for controlling the vibration actuator

Control of the vibration actuator in the steering wheel is initiated by the KAFAS control unit in interaction with the ZGM, ICM and SZL.

The ICM is always included in the control of the vibration actuator so that, in vehicles equipped with both the optional lane change warning and the lane departure warning, the driver is able to distinguish between the warnings of these similar systems.

Fig. 122: Control Of Lane Departure Warning Vibration Actuator On F01/F02

LANE DEPARTURE WARNING VIBRATION ACTUATOR CONTROLS REFERENCE CHART

KAFAS KAFAS - control unit
ZGM - Central gateway module
SZL - Steering column switch cluster
ICM - Integrated Chassis Management

The fundamental prerequisites for system activation and ready state are:

• Road speed higher than 40 mph.
• Left lane, right lane or both lanes are detectable by the system with a sufficient level of certainty.

The local roadway markings, environmental conditions and the physical limitations of an optical system must all be taken into consideration

• The lane departure warning system has been calibrated correctly (see "SERVICE INFORMATION").
• There is no fault in the system.

High-beam Assistant

The high-beam assistant (FLA) assists the customer in the use of the high-beam headlights. Depending on the traffic situation, the prevailing ambient light conditions and which lights on the vehicle have been switched on, the FLA switches on the high-beam headlights automatically and thereby relieves the customer of having to switch the high-beam headlights on manually.

High-beams can still be switched on and off manually as usual. The driver always has the capability, and indeed the obligation, to override the system whenever the situation requires it.

HIGH-BEAM ASSISTANT LEGENDS

1. Steering column stalk
2. High-beam assistant button
3. Display when high-beam assistant activated
4. Display when high-beam headlights on

Fig. 123: Display High-Beam Assistant Button

In the F01/F02, the high-beam assistant option is implemented differently depending on the equipment combination.

In combination with the lane departure warning, the high-beam assistant function shares the same video camera and the same KAFAS control unit.

High-beam assistant with the video camera of the lane departure warning and the KAFAS control unit in the F01/F02

Fig. 124: Identifying KAFAS Control Unit With PT-CAN And Lane Departure Warning Camera With LVDS

1. KAFAS control unit with connection to vehicle electrical system on PTCAN
2. Video camera for lane departure warning and high-beam assistant.

   The image data sent from the video camera to the KAFAS control unit along the LVDS data line

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