Part II

LED Headlight

Adaptive Headlights
The light switch of the operating facility for lights must be turned to "Position A" to activate the adaptive headlights.
The adaptive headlights system moves the headlights horizontally to the right or left towards the inside of the respective bend when cornering.The bend is better illuminated and the adaptive headlights guide the vehicle through the bend.

Headlight courtesy delay feature
The headlight courtesy delay feature can be activated via the turn signal/high beam switch.The headlight courtesy delay feature is triggered by activating the headlight flashers once.The switch-on time is set at 40 seconds at the factory, but can be adjusted to between 0 and 240 seconds using the "Personal Profile" feature.If the headlight courtesy delay feature is switched on, the following lighting functions are activated:
- Low-beam headlights
- Parking lamps
- Side marker light

Cornering light
For the cornering light, an additional light source is switched on to illuminate the relevant edge of the roadway.The cornering light LED module is automatically activated depending on the steering angle and driving speed.During vehicle standstill, for example at traffic lights, the cornering light is activated by the turn indicator.In addition, the low-beam headlight's swivel module ensures asymmetrical light distribution and the high-beam headlight creates the necessary range.The movement of the LED headlights is continuously adjusted while cornering.The following preconditions must be satisfied before the cornering light can be activated automatically:
- Light switch in "Position A"
- Rain-light-solar-condensation sensor reports insufficient brightness
- "Terminal 15 on"
- Driving speed less than 70 kilometres per hour







The improved illumination while cornering helps prevent accidents through early detection of obstacles.The cornering light improves the driver's perception of the surroundings, especially immediately in front of the vehicle.The cornering light enables a quick response to the current driving situation.The system is controlled by the cornering light LED module and is thus less susceptible to malfunctions than a purely mechanical system.At driving speeds in excess of 70 kilometres per hour, the cornering light is no longer activated.

Variable light distribution
The light switch of the operating facility for lights must be turned to "Position A" to activate the variable light distribution. In the European market version, the variable light distribution function is integrated in the footwell module (FRM).
The variable light distribution includes:
- Urban traffic, light distribution
- Country road light distribution
- Motorway light distribution

The following descriptions relate to vehicles with LED headlights for right-hand traffic in the country of registration.







Urban traffic light distribution
The urban traffic light distribution enables a broader illumination of the left roadway at low speeds.The urban traffic light distribution is switched on from engine start up to a speed of 50 kilometres per hour.Better illumination of the roadway is achieved through the footwell module (FRM) using the following measures:
- Lowering the left LED headlight
- Moving the light cone of the left LED headlight to the left







Country road light distribution
The system switches from the urban traffic light distribution to the country road light distribution as soon as the driving speed exceeds 50 kilometres per hour.The system reverts to the urban traffic light distribution when the driving speed returns to below 40 kilometres per hour.The footwell module (FRM) receives both the speed signal and the "engine running" signal from the central gateway module (ZGM) via the K-CAN2.The basic setting for light distribution is once again assumed if there are faults in the complete system.







Motorway light distribution
The motorway light distribution increases the range of the driving light. The footwell module (FRM) adjusts the LED headlights to motorway light distribution under the following preconditions:
- Driving speed exceeds 110 kilometres per hour for longer than 30 seconds
- Driving speed exceeds 140 kilometres per hour







The LED headlights are lowered once the driving speed falls below 110 kilometres per hour.The headlight beam throw adjustment of the LED headlights is carried out in stages from 110 kilometres per hour, at each of the following speeds:
- 100 kilometres per hour
- 90 kilometres per hour
- 80 kilometres per hour

From 80 kilometres per hour, the LED headlights are fully reset to country road light distribution.

Automatic headlight beam throw adjustment
As standard, vehicles with LED headlights have automatic headlight beam throw adjustment to compensate different load statuses of the vehicle.The automatic headlight beam throw adjustment for the LED headlight also includes:
- Dynamic headlight beam throw adjustment
- Adaptive headlight beam throw adjustment

The dynamic headlight beam throw adjustment was developed for compensating pitching movements that occur as a result of braking and acceleration.
The adaptive headlight beam throw adjustment uses vehicle information to identify driving over rises or dips.The headlights are turned appropriately.The automatic headlight beam throw adjustment thus ensures that oncoming traffic is not dazzled.
The automatic headlight beam throw adjustment is supported by 2 ride height sensors.one ride height sensor each located on the front axle and the rear axle of the vehicle.Data from ride height sensors are evaluated directly by the Integrated Chassis Management (ICM). The footwell module (FRM) receives signals from the Integrated Chassis Management (ICM) through the KCAN2. Within the central gateway module (ZGM) the FlexRay transfers the signal to the K-CAN2.
The following graphic shows the light cone's primary motion patterns during operation of the automatic headlight beam throw adjustment.







When driving through a dip, the headlight beam throw of the LED headlights is raised without dazzling an oncoming vehicle.Roadway obstacles are recognised earlier than with previous headlights.This makes it possible to react to obstacles early and initiate evasive manoeuvres as required.
The following illustration shows vehicle driving through a dip.







When the vehicle drives over a hump the beam throw of the LED headlights is lowered.The driver of an approaching vehicle is therefore subjected to less glare than with the headlights used up to now.

The following illustration shows vehicle driving over a hump.







Turn indicator
The front turn indicators can be switched on from "terminal R".The turn indicators are operated by the turn signal/high beam switch on the steering column switch cluster (SZL). The signal from the turn signal/high beam switch is transmitted both via FlexRay protocol and through a separate line to ensure functional redundancy. This enhances the availability of the systems in the event of a fault.The turn indicator light remain operational even when the information fails to reach the footwell module (FRM) through the bus system. This redundant data-transmission is also employed for activating the one-touch flashing function. If a turn indicator is faulty, the remaining turn indicators flash twice as quickly.The malfunction is displayed to the driver as a Check Control message in the instrument cluster (KOMBI).
During one-touch flashing the turn indicators are activated once. The number of flashes can be set to once or three times in "Personal Profile".A visual and acoustic indication of turn indicator status is supplied by the instrument panel (KOMBI). The footwell module (FRM) transmits the information to the instrument panel (KOMBI) via K CAN2, and the instrument panel responds by activating the acoustic sensor and the indicator lights simultaneously with the turn indicators. The acoustic signal and visual display in the instrument cluster (KOMBI) are deactivated when the vehicle's central locking system is engaged while the hazard warning flasher function is activated.

Hazard warning flashers
The hazard warning flashers are activated by pressing the hazard warning switch. All turn indicators are activated simultaneously while the hazard warning switch display within the instrument panel also flashes. With "Terminal 30 on" the hazard warning flashers are implemented in their energy-saving mode. In this mode the hazard warning flashers light up for a shorter period and remain off for a longer period than usual. When the turn signal/high beam switch is used to activate the turn indicator light while the hazard warning flashers are operating, the turn indicator light assumes priority. The system reverts to operation of the hazard warning flashers after "Terminal 15 off" or when the turn indicator light has returned to its original position. If the hazard warning switch is depressed while the turn indicator light is operating, then the hazard warning flashers assume priority.

Hazard warning flashers when anti-theft alarm system triggers alarm
When an alarm is triggered, the footwell module (FRM) receives the command to activate the hazard warning flashers via K CAN2. The signal is generated by the ultrasonic interior movement detector. The hazard warning flashers continue for 6 minutes provided that the anti-theft alarm system is not switched off in the intervening period. When the anti-theft alarm system is signalling an active alarm the hazard warning switch is suppressed and does not flash with the alarm system. The ultrasonic interior movement detector is completely integrated within the roof function centre (FZD).

Hazard warning flasher in the event of hazards or emergency braking
In the event of hazard braking or emergency braking, the hazard warning flasher is automatically activated.This serves as supplementary warning source for following traffic. If the vehicle comes to a standstill, the hazard warning flasher remains switched on.The hazard warning flasher is switched off if the vehicle is accelerated again.

Parking light
The turn signal/high beam switch can be used to activate the parking light whenever the status "Terminal 30 on" is present.The turn signal/high beam switch must be pushed to the left or right in the direction of travel for longer than half a second.This temporal prerequisite avoids the parking light being switched on accidentally.This could happen if the turn signal/high beam switch is unintentionally operated when getting out of the vehicle, for example.The footwell module (FRM) receives the command requesting activation of the side lights from the steering column switch cluster (SZL). The central gateway module (ZGM) transmits the signal to K-CAN2.

Visual feedback signal from central locking system
The factory setting for the central locking system's visual feedback signal is the flashing of the turn indicators upon activation.The Car Access System (CAS) furnishes the signal through K CAN2. The visual feedback signal can be deactivated in "Personal Profile".The anti-theft alarm system can also initiate visual feedback signals for the customer.

Emergency light operation
To avoid the exterior lights being switched off while driving, the driving lights activated in driving mode remain on.In the following situations, the exterior lights are switched off:
- "Terminal 15 on" fails
- Emergency engine stop (press start/stop button 3 times)
- Accidental pressure on the start/stop button

If the driving speed falls to below 20 kilometres per hour, the driving lights are not switched off until after a delay of approximately 30 seconds.

Notes for Service department

Adjust LED headlights
The headlight adjustment can be performed as previously.
If the driving lights are switched on by the automatic driving lights control, the urban traffic light distribution is activated.The LED headlights can only be correctly adjusted in the country road light distribution mode.In the urban traffic light distribution mode the left LED headlight is simultaneously lowered and swivelled slightly to the left.If the light is set to urban traffic light distribution, oncoming traffic may be dazzled by the automatic driving lights control while driving.
Therefore, always set the headlight adjustment to "Position 2".

Right-hand traffic and left-hand traffic
When crossing the border into countries that drive on the other side of the road to the country of registration, the LED headlights must be covered with suitable adhesive film.

Component replacement
During the service life of the vehicle, various repairs may become necessary.In the course of repairs, components for various software versions and hardware numbers may be installed.New parts are then used together with components already installed in the vehicle.It is always essential to adapt the replacement components for operation in the vehicle.Among the components that may be replaced when the vehicle is serviced are the:
- Footwell module (FRM)
- LED main light module
- Headlight driver module
- LED headlight
- LED module, cornering light
- Outer fan
- Inner fan

When replacing individual components, proceed according to repair instructions.Ensure that only Original BMW replacement parts are used.Only Original BMW replacement parts guarantee the function of the LED headlights.

Diagnosis
The LED headlights can be set to the "diagnostic mode" for carrying out various diagnosis orders.For example, the "diagnostic mode" is required for the following diagnosis orders:
- Reading out the relevant bus signals
- Vehicle speed
- Yaw rate
- Steering angle

- Checking the correctness of the signal
- Checking the switch-on conditions
- Status of rain-light-solar-condensation sensor.
- Status of high-beam assistant
- Status of operating facility for lights

When expected bus signals are not received and when they are classified as implausible a corresponding diagnostic trouble code (DTC) is logged in the footwell module (FRM).
The footwell module (FRM) enables the diagnosis of the LED main light module and the cornering light LED module.

General notes

Monitoring of light source
Faulty LEDs are detected by the LED main light module or the headlight driver module and the fault message is sent to the footwell module (FRM).

Hot monitoring at "lights on"
The hot monitoring relies on current measurement at the individual output terminals on the footwell module (FRM).The power consumption readings assist in detection of short and open circuits.Failure of the LED headlights is indicated as a Check Control message in the instrument cluster (KOMBI).

Emergency operation
If the footwell module (FRM) develops a fault that could lead to the failure of an LED headlight, an emergency operation is activated by the LED main light module.In the event of a fault in the LED main light module, the emergency operation is activated by the footwell module (FRM).However, the driving lights remain switched on until the vehicle is stopped.The malfunction is displayed to the driver as a Check Control message in the instrument cluster (KOMBI).
We can assume no liability for printing errors or inaccuracies in this document and reserve the right to introduce technical modifications at any time.