Lighting Systems - Overview BMW M6 E63/E64

Scheme 148

Introduction

Adaptive headlights turns the bi-xenon headlights towards the inside of a bend when cornering. This improves illumination of the curve of the road. Visibility is therefore improved.

When cornering, the driver is not looking into a "black hole" - instead, the adaptive headlights allow the driver to see the curve of the road.

This service information describes the adaptive headlights for the following model series

1. > E60, E61, E63, E64 up to 03/2005: See «SYSTEM OVERVIEW OF ADAPTIVE HEADLIGHTS (E60, E61, E63, E64, E65, E66 UP TO 03/2005)»(/bmw/m6/e63e64-2005-2010/remont/exterior-lights/#lights-service-information__system-overview-of-adaptive-headlights-e60) The system overview applies accordingly for the E65 and E66 up to 03/2005.
2. > E60, E61, E63, E64 from 03/2005 until 09/2005 See «SYSTEM OVERVIEW OF ADAPTIVE HEADLIGHTS (E60, E61, E63, E64, E65, E66 FROM 03/2005)»(/bmw/m6/e63e64-2005-2010/remont/exterior-lights/#lights-service-information__system-overview-of-adaptive-headlights-e60) The system overview applies accordingly for the E65 and E66 from 03/2005.

Note. AHL control unit discontinued from 03/2005. From 03/2005, the AHL control unit software is integrated into the light module on the E60, E61, E63, E64, E65 and E66. The AHL control unit is no longer fitted.

1. > E60, E61, E63, E64 from 09/2005 The vehicle electrical system was changed from 09/2005. As a result of the change, several control units were discontinued and some control unit functions were integrated into new control units.
2. > E70 The turning lights function is new on the E70 from the start of series production. The turning lights give the area next to the carriage way additional illumination when you are turning or cornering (driving in tight bends). They are also active when you park the vehicle. Depending on the country concerned, the turning lights are activated when cornering.
3. > E81, E87, E90, E91, E92, E93 For the E81, E92, E93 from start of series production and for the E87 from 03/2007, the turning light function is new.

Note. Turning lights on E70, E81, E87, E92, E93 only in conjunction with option 524 Turning lights are a subfunction of option 524 "Adaptive headlights". Bi-xenon headlights are standard equipment on the E92, E93. Option 524 is standard on the US version.

Note. AHL components on E46, E53 and E83 There is a separate system description for the adaptive headlights on the E46, E53, E83.

Note. AHL components on the E63, E64 The E63, E64 has a zero-position sensor. Otherwise, the E63 and E64 are the same as the other 5-Series models.

Note. Components for adaptive headlight on E70, E81, E87, E90, E91, E92, E93 On the E81, E87, E90, E91, E92, E93, the adaptive headlights largely correspond to those on the E60, E61, E63, E64, E65 and E66: E70, E81, E87, E90, E91, E92, E93 vehicles are equipped with a zero-position sensor. On the E70, E81, E87, E90, E91, E92, E93, the FRM (footwell module) acts as control unit for exterior lighting. The footwell module contains the functions of the light module, AHL control unit and the general module (or body general module).

Brief Description of Components

The following components and control units provide signals for the adaptive headlight system

CAS: Car Access System

The Car Access System supplies signals for the terminal management (e.g. terminal 15 ON).

The adaptive headlights control unit is activated when terminal 15 is switched ON.

Light Switch

The rotary switch for the side lights and dipped headlights differs depending on the vehicle equipment level (adaptive headlights, automatic driving lights control, automatic or manual headlight-range adjustment). For the adaptive headlights function to operate, the light switch must be set to position "A" ("A" = "automatic driving lights control" and "adaptive headlights").

See LIGHT SWITCH

Turn-Signal/Main-Beam Switch

The main-beam headlights are switched on and off with the turn-signal/main-beam switch (by pressing or pulling the switch). The adaptive headlights function operates with both dipped and main-beam headlights.

See DIRECTION INDICATOR/MAIN-BEAM SWITCH

SZL: Steering Column Switch

The SZL control unit forwards the signals from the turn-signal/main-beam switch to the adaptive headlights control unit.

1. E60, E61, E63, E64, E65 and E66 See «SZL: STEERING COLUMN SWITCH CLUSTER»(/bmw/m6/e63e64-2005-2010/remont/exterior-lights/#lights-service-information)
2. E70, E81, E87, E90, E91, E92, E93 The steering column switch cluster forwards the signals from the turn-signal/main-beam switch to the footwell module (FRM).

Ride-Height Sensors

If the special equipment "Adaptive headlights" is fitted, the adaptive headlights control unit evaluates the signals from the ride-height sensors. This is because: the adaptive headlights control unit also controls the automatic headlight-range adjustment.

The automatic headlight - range adjustment feature adjusts the vertical aim of the headlights to compensate for variations in the vehicle tilt angle (e.g. when the vehicle is laden, and under braking and acceleration in dynamic driving situations).

See E60, E61, E63, E64, E65, E66, E90 - RIDE-HEIGHT SENSORS

Brake Light Switch

If the special equipment "Adaptive headlights" is fitted, the signals from the brake light switch are read by the adaptive headlights control unit.

In addition, the brake light switch signal is also a signal for automatic headlight-range adjustment, see RIDE-HEIGHT SENSORS above.

Position Sensor

1. E60, E61
2. E65, E66

Hella headlights have a position sensor.

The position sensor in the positioner module for the bi-xenon headlights supplies a signal for the horizontal movement of the headlights.

See POSITION SENSOR

Zero-Position Sensor

1. > E63, E64
2. > E70, E81, E87, E90, E91, E92, E93

Automotive Lighting headlights, previously Bosch, have a zero-position sensor.

The zero-position sensor registers the horizontal movement of the headlight.

See ZERO-POSITION SENSOR

EGS Control Unit or Reversing Light Switch

When reverse gear is engaged, the headlights are moved to the straight - ahead position.

1. On vehicles with automatic transmission, the EGS control unit provides the "Reverse gear engaged" signal. (EGS: electronic transmission control).
2. On vehicles with manual transmission, the signal is supplied by the reversing light switch.

Rain-Light Sensor For Automatic Driving Lights Control

The rain - light sensor measures the ambient brightness outside the vehicle.

1. In twilight conditions, the rain - light sensor transmits the message "Twilight" so that the automatic headlight - range adjustment can activate dipped headlights. The headlights are tilted up and down as required, but they are not yet moved towards the bend in the road.
2. In darkness, the rain-light sensor sends the message "Darkness". The adaptive headlights are then activated when the vehicle is cornering. The headlights are moved to the left or right

See RAIN-LIGHT SENSOR FOR AUTOMATIC DRIVING LIGHTS CONTROL

Steering-Angle Sensor and DSC Sensor

The steering angle sensor and DSC sensor (DSC = Dynamic Stability Control) supply signals for the adaptive headlights to the adaptive headlights control unit. These signals are evaluated as follows, depending on the vehicle's speed

1. Vehicle speeds up to 30 km/h: The adaptive headlights function is controlled using the information from the steering angle sensor (in the steering column switch cluster).
2. Vehicle speeds between 30 km/h and 50 km/h: In the 30 to 50 km/h speed range, there is a continuous transition in signal evaluation: from the evaluation of signals sent by the steering angle sensor to evaluation of the signals sent by the yaw-rate sensor (in the DSC sensor).
3. In extreme dynamic driving situations , e.g. if the vehicle starts to skid or fishtail, even at speeds less than 50 km/h , the signals from the yaw-rate-sensor are considered. If the vehicle starts to skid or fishtail, the headlights will move to the straight - ahead position. The headlights are not moved until the vehicle has stabilized.
4. Vehicle speeds over 50 km/h: At speeds upwards of 50 km/h, the signals from the yaw-rate sensor (in the DSC sensor) form the primary basis for control of the adaptive headlights function. Reason: For a constant cornering radius, the steering angle required increases disproportionately with speed. In addition, the steering angle required also depends on the coefficient of friction of the road surface. Yaw rate is directly proportional to speed. For this reason, the yaw rate is always the most suitable measure for controlling the adaptive headlights at high speeds. Even at high speeds, however, the steering angle sensor signal is used to detect (predict) the driver's commands in advance. This prediction is important: The yaw rate signal is not supplied until the vehicle has responded to the steering wheel movement. The steering-angle sensor signal is disabled so that rapid, momentary steering adjustments do not affect the adaptive headlights function.

A number of control units are involved in the adaptive headlights system (see above: CAS: CAR ACCESS SYSTEM , EGS CONTROL UNIT OR REVERSING LIGHT SWITCH and SZL: STEERING COLUMN SWITCH ). Depending on the model series and model version concerned, the adaptive headlights are actuated by the following control units

AHL: Adaptive Headlights

1. > E60, E61, E63, E64, E65, E66 up to 03/2005

The AHL control unit actuates the adaptive headlights.

For safety reasons, the AHL control unit is also responsible for the automatic headlight-range adjustment. This is because: Oncoming traffic must not be dazzled by the adaptive headlights. If a headlight sticks in an unfavorable position, the AHL control unit will attempt to move this headlight down (using the stepper motors in the automatic headlight-range adjustment).

The AHL control unit is connected to the PT-CAN.

See AHL: ADAPTIVE HEADLIGHTS

LM: Light Module

1. E60, E61, E63, E64, E65, E66 from 03/2005

From 03/2005, the AHL control unit is integrated in the light module.

The light module (LM) controls and monitors all vehicle lights. Information is transmitted and received via the K-CAN data bus.

The light module actuates the indicator light for the adaptive headlights (on the light switch).

See E60, E61, E63, E64 FROM 03/2005 and/or E65, E66 (FROM 03/2005)

FRM: Footwell Module

1. > E70, E81, E87, E90, E91, E92, E93

The footwell module controls the exterior lighting and the adaptive headlights.

The footwell module thus takes the place of the light module and the AHL control unit.

The footwell module actuates the indicator light for the adaptive headlights (on the light switch).

See FRM: FOOTWELL MODULE

The footwell module has its own system description.

SMC: Stepper Motor Controllers

The stepper motor controllers control the stepper motors in the headlights (for the automatic headlight - range adjustment and for the adaptive headlights). The stepper motor controllers are not capable of self - diagnosis. The stepper motor controllers are diagnosed and encoded via the control unit for adaptive headlights.

See SMC: STEPPER MOTOR CONTROLLERS

SGM: Safety and Gateway Module

1. E60, E61, E63, E64 until 09/2005 and E65, E66

The safety and gateway module (SGM) is the interface between the two data buses K-CAN and PT-CAN. Thus, all information exchanged between the light module and the AHL control unit passes through the SGM. Information from the yaw-rate sensor (in the DSC sensor) is also fed through the SGM to the AHL control unit.

KGM: Body Gateway Module

1. E60, E61, E63, E64 from 09/2005

The vehicle electrical system was changed from 09/2005.

As a result of the change, several control units were discontinued and some control unit functions were integrated into new control units.

The new body gateway module (KGM) supersedes the safety and gateway module (SGM) previously fitted, the door modules and the micro - power module.

Xenon-Headlight Control Unit

The xenon-headlight control unit actuates the bulb in the bi-xenon headlights.

The xenon-headlight control unit is not capable of self-diagnosis. The xenon control unit is monitored by the light module (E70, E81, E87, E90, E91, E92, E93: footwell module).

See E60, E61, E63, E64, E65, E66, E90 - BI-XENON HEADLIGHTS

Headlights

Option 524 "Adaptive headlights" is only available in conjunction with option 522 "Xenon dipped and main-beam headlights". This means that bi-xenon headlights are employed.

See E60, E61, E63, E64, E65, E66, E90 - BI-XENON HEADLIGHTS

Stepper Motors For the Adaptive Headlights

The stepper motors turn the positioner modules in the bi-xenon headlights.

The stepper motors move the headlights vertically and horizontally (vertically = up and down for automatic headlight range adjustment

horizontally = left and right for the adaptive headlights function).

The positioner modules execute the movement.

See POSITIONER MODULES

Indicator Light On the Light Switch

The indicator light (green LED) next to the "A" (= "automatic driving lights control" and "adaptive headlights") has 2 display functions

1. The indicator light lights up permanently when the automatic driving lights control or adaptive headlights function is switched on (= light switch in position "A").
2. The indicator light flashes if a fault develops in the adaptive headlight system.

1. E60, E61, E63, E64, E65 and E66: The indicator light is actuated by the light module.
2. E70, E81, E87, E90, E91, E92, E93: The indicator light is actuated by the footwell module.

System Functions

The adaptive headlights system moves headlights horizontal (i.e. from left to right) in order to illuminate the inside of a bend when cornering.

The following functions of the adaptive headlights system are described below

1. System activation and automatic calibration
2. Activation of stepper motor controllers
3. Speed-dependent analysis of signals
4. Adjustment of headlight horizontal aim
5. Deactivation of adaptive headlights function under extreme handling conditions
6. Deactivation of adaptive headlights function in response to system faults
7. Setting headlights to parked position
8. Automatic headlight-range adjustment
9. Adaptive headlights for automatic driving lights control
10. Turning light

Note. Different control units for adaptive headlights. E60, E61, E63, E64, E65, E66 up to 03/2005: The adaptive headlights are actuated by the AHL control unit. E60, E61, E63, E64, E65, E66 from 03/2005: The adaptive headlights are actuated by the light module (LM). E70, E81, E87, E90, E91, E92, E93: The adaptive headlights are actuated by the footwell module (FRM).

System Activation and Automatic Calibration

When terminal 15 is switched ON, the headlights always perform a calibration sequence, even if the dipped headlights are not switched on. The control unit for adaptive headlights sends the "perform calibration sequence" request to the stepper motor controllers (SMCs, control units for the headlight stepper motors). The stepper motor controllers actuate the stepper motors in the headlights. The calibration sequence is performed. In the calibration sequence, the headlights move as follows

1. The headlights move to the right and left (= calibration sequence for adaptive headlights).
2. The headlights move up and down (= calibration sequence for automatic headlight - range adjustment).
3. At the end of the calibration sequence, the headlights are in the straight-ahead position.

Following the calibration sequence, the system is ready for operation.

When reverse gear is engaged, the headlights are moved to the straight-ahead position.

Note. The calibration sequence is performed only after terminal 15 has been switched OFF for at least 15 seconds. > E66, E61, E63, E64, E65, E66 until 09/2006 > E87, E90, E91, E92, E93 until 03/2007 If terminal 15 is repeatedly switched on and off (e.g. for demonstration purposes), the calibration sequence will not be executed every time terminal 15 is switched on. Terminal 15 must have been switched off for at least 15 seconds before it is switched on again. Only then is a calibration sequence performed when terminal 15 is switched on.

Note. Calibration sequence always after terminal 15 ON and dipped - beam headlights ON. > E66, E61, E63, E64, E65, E66 from 09/2006 > E70 from start of series production > E81, E87, E90, E91, E92, E93 from 03/2007 If terminal 15 is repeatedly switched on and off (e.g. for demonstration purposes), the calibration sequence will not be executed every time terminal 15 and the dipped-bead headlights are switched ON.

Note. Calibration sequence with enlarged range of movement. > not E65, E66 From 09/2007, starting with the E60, E61, E63, E64, a calibration sequence with larger range of movement will be introduced. The calibration sequence with larger range of movement will then gradually be introduced on other model series.

Activation of Stepper Motor Controllers

The control unit for adaptive headlights sends the stepper motor controllers (SMC) the nominal values for the positioner modules (position of positioner modules and speed of movement).

The control unit for adaptive headlights calculates the nominal values using the following signals

1. Vehicle road speed
2. Steering angle (at speeds up to 50 km/h, dependent on encoding)
3. Yaw rate (50 km/h upwards, see «STEERING-ANGLE SENSOR AND DSC SENSOR»(/bmw/m6/e63e64-2005-2010/remont/exterior-lights/#lighting-systems-overview__steering-angle-sensor-and-dsc-sensor) above)

Speed-Dependent Analysis of Signals

Depending on the road speed, the adaptive headlights are controlled using the following signals: Signals from the steering angle sensor and signals from yaw - rate sensor (in the DSC sensor).

The encoding (at the end of the production line) determines the priority assigned to sensor signals above which speed threshold.

Adjustment of Headlight Horizontal Aim

The stepper motor controllers move the headlights to the right or left when the vehicle corners.

Horizontal range of movement of headlights

1. Inwards, i.e. towards center of vehicle: up to max. 8°
2. Outwards: up to max. 15°

Example: Right - hand bend

The right-hand headlight turns by up to 15° (the right-hand headlight is the "inside" headlight on a right-hand bend).

Viewed from the vehicle, the right-hand headlight moves "outwards".

The left-hand headlight moves up to 8° (the left-hand headlight moves towards the middle of the vehicle, i.e. "inwards" as viewed from the vehicle).

The headlight on the outside of the bend has to reach its end position at the same time as the headlight on the inside of the bend so that the carriage way remains smoothly and evenly illuminated.

On a right-hand bend, the left-hand headlight is on the outside of the bend. The right-hand headlight is on the inside of the bend.

Deactivation of Adaptive Headlights Function Under Extreme Handling Conditions

If the vehicle drifts, skids and loses sideways grip, the adaptive headlights function is deactivated as follows

1. The headlights are returned to the straight-ahead position. The headlights are no longer turned.
2. The dipped headlights remain on.

Deactivation of Adaptive Headlights Function In Response To System Faults

Until 09/2007, a system fault will be indicated by the indicator lamp on the light switch flashing.

From 09/2007 system fault will be indicated by a Check-Control message in the instrument cluster.

Dazzling of oncoming traffic must be prevented in the event of a system fault.

For this reason, the adaptive headlights function is deactivated as follows

1. If the stepper motors are still functional, the headlights are returned to the straight-ahead position. The headlights are no longer moved towards bends in the road.
2. If it is no longer possible for a headlight to be moved back to the straight-ahead position, the headlight is tilted downwards (by the stepped motors for automatic headlight-range adjustment). This prevents dazzling of oncoming traffic.
3. Vehicles up to 09/2007 If the headlight cannot be tilted downwards, the bi-xenon bulb in this headlight is disabled as follows: When the vehicle is parked up, the control unit registers sleep mode for the adaptive headlights, as follows: Vehicle standstill and terminal R OFF for several minutes. The next time the vehicle is restarted, the bi-xenon light of the defective headlight is not switched on. The front foglights are switched on in order to ensure a minimum level of illumination. The dipped beam headlights are not switched off while the vehicle is in motion.

Note. From 09/2007, the dipped - beam headlights will not be switched off in the event of a system fault. If a system fault develops in the adaptive headlights, the dipped-beam headlights for the affected headlight will not be switched off.

Setting Headlights To Parked Position

When terminal R is switched off, the headlights move to the parked position. The parked position is important for the headlights' next calibration sequence: From the parked position, the headlights are run through a calibration sequence in the pre-drive-check. During each calibration sequence, the control unit for adaptive headlights relearns the straight - ahead position for the headlights.

When the headlights have reached the parked position, the stepper motor controllers SMCs inform the control unit for adaptive headlights ("verification").

The control unit for adaptive headlights deactivates the stepper motor controllers.

The run-down period lasts approx. 10 seconds.

Automatic Headlight-Range Adjustment

If the special equipment "Adaptive headlights" is fitted, the control unit for adaptive headlights also controls the automatic headlight-range adjustment.

The automatic headlight - range adjustment adapts the headlight range for different operating conditions. Variations in the vehicle tilt angle are produced by vehicle loads and braking or acceleration in extreme driving situations. The automatic headlight-range adjustment moves the headlights up and down as required.

The control unit for adaptive headlights also controls the automatic headlight-range adjustment as follows

1. The ride-height sensors and the brake light switch supply the signals for the automatic headlight-range adjustment.
2. The control unit for adaptive headlights computes the vehicle inclination (longitudinally to the roadway) from the signals.
3. The stepper motors for the automatic headlight-range adjustment automatically and dynamically control the headlight range. The headlight range is adjusted so that the actual headlight range conforms to the legally required headlight range as follows: If vehicle rear is lower than front: The actual headlight range will be longer than the legally stipulated range. The headlight beam height is lowered to reduce the headlight range to match the legal requirement. If the vehicle is horizontal: The actual headlight range will be the same as the legally stipulated range. If vehicle front is lower than rear: The actual headlight range will be shorter than the legally stipulated range. The headlight beam height is raised to increase the headlight range to match the legal requirement.

Adaptive Headlights For Automatic Driving Lights Control

The automatic driving lights control feature (option in conjunction with the rain-light sensor) automatically switches the side lights and dipped headlights on or off.

Switch-on conditions

1. The automatic driving lights control must be encoded (in the light module on the E60, E61, E63, E64, E65, E66, in the footwell module on the E70, E81, E87, E90, E91, E92, E93).
2. The light switch must be in position "A" ("A" for automatic driving lights control and adaptive headlights).
3. The rain-light sensor must be installed and operational. The rain-light sensor detects the brightness of the ambient light. The rain-light sensor sends the following prompts to the light module (on the E70, E81, E87, E90, E91, E92, E93: footwell module): Ambient brightness low: In twilight, darkness, in an underground garage or tunnel. "Switch on dipped headlights" request Ambient brightness sufficient. "Switch off dipped headlights" request

If only the side lights are to be switched on, the light switch must be set to side lights (switch position 1).

When the light switch is set to position "A", the control unit for adaptive headlights is also activated

1. When the automatic driving lights control function switches on the dipped headlights (e.g. at dawn/dusk), the adaptive headlights function is notified at the same time. The control unit for adaptive headlights thus assumes control of the automatic headlight - range adjustment.
2. In addition, signals from the rain - light sensor are evaluated (E60, E61, E63, E64, E65, E66: by the light module; E90, E91, E92, E93: by the footwell module). The headlights are not turned when the vehicle is cornering until total darkness sets in.

The message "dipped headlights on" is given individually for each headlight.

If a headlight fails, the adaptive headlights are switched off.

The front foglights are switched on in order to ensure a minimum level of illumination.

Turning Lights

The turning lights are coupled to the adaptive headlights (option 524).

The footwell module (FRM) uses the following signals to adjust the turning lights

1. Steering angle
2. Yaw rate
3. Status of reverse gear

1. > E81, E92, E93 with start of series production and E87 from 03/2007 Instead of the main-beam headlight (H7), the main headlight with turning light has a fixed additional reflector with an H3 bulb. The special shape of the lens prevents dazzle to the front.

The (Scheme 149) shows the main headlight with turning light on the E81, E87, E92, E93

Scheme 149

1. Bi-xenon light
2. H8 bulb for side lights and daytime driving lights
3. H3 bulb for turning lights
4. Reflector for turning lights

The (Scheme 150) shows the turning light on the E81, E87, E92, E93

Scheme 150

1. Left turn
2. Right turn

The following conditions must be satisfied for the turning lights to be switched on

1. Terminal 15 ON
2. Light switch in position "A" ("A" stands for automatic driving lights control)
3. Rain-light sensor detects twilight or darkness (threshold exceeded)

The turning lights are not activated at speeds greater than 70 km/h.

1. > Europe version: For legal reasons, the turning lights on the Europe version can only be activated via the turn signal indicator at speeds up to 40 km/h.

When reversing, the footwell module (FRM) activates the turning lights as follows in the speed range 0 km/h to 35 km/h

1. US version: both sides
2. Other countries: outside of turn only

When the turn signal indicator is switched on

If the vehicle is stationary, the turning lights will automatically be deactivated after approx. 4 seconds, e.g. when waiting at traffic lights. However, the turning lights can be activated again with the turn-signal/mainbeam switch (up to 3 times) until the reflector has reached a certain temperature.

A temperature model protects the headlights from excessive thermal stress.

The switching-off conditions for the turning light depend on the country concerned.

Note. Temperature monitoring by temperature model A temperature model in the footwell module calculates the temperature of the reflector. The temperature of the reflector must not exceed a certain value. If a critical temperature is reached, the footwell module (FRM) will deactivate the turning lights. The turning lights can be activated again after a cooling-off phase.

1. > E70 with start of series production The turning lights are realized using the front foglights. (Reason: The installation location of the headlights is too high for the turning lights. This prevents legal stipulations from being adhered to.) Depending on actuation, the right - hand and/or left-hand front foglight is switched on. The turning lights are actuated by the light module (LM). The front foglights have an additional reflector to illuminate the areas to the sides better. When turning, the front foglight on the inside of the turn is automatically activated. The additional reflector for the turning light reflects the light beam towards the turning area. The turning light are not switched on suddenly but rather faded according to special time parameters. Depending on the country concerned, the turning lights are switched on when cornering.

The (Scheme 151) shows the front foglight on the E70

Scheme 151

1. Additional reflector for the turning light
2. Reflector for the front foglights
3. Bulb

The following conditions must be satisfied for the turning lights to be switched on

1. Terminal 15 ON
2. Light switch in position "A" ("A" stands for automatic driving lights control)
3. Rain-light sensor detects twilight or darkness (threshold exceeded)

and

1. Turn signal indicator ON (not one-touch turn signal)
2. Speed range (forwards): Europe and Japan version from 0 km/h to 35 km/h US version from 0 km/h to 65 km/h
3. Swivel angle (theoretical): when stationary > or = 77° when driving > or = 10°

Alternatively

1. Speed range (reverse): 0 km/h to 35 km/h
2. Swivel angle (theoretical): when stationary or driving > or = 70°

If the vehicle is stationary, the turning lights will automatically be deactivated after a certain time, e.g. when waiting at traffic lights. However, the turning lights can be activated again with the turn-signal/main-beam switch.

The following conditions must be satisfied for the turning lights to be switched off

1. Light switch not in position "A" ("A" stands for automatic driving lights control)
2. Rain-light sensor does not detect twilight or darkness (lower threshold exceeded)

Alternatively

1. Turn signal indicator OFF
2. Speed range (forwards): Europe and Japan versions > or = 40 km/h US version > or = 70 km/h
3. Swivel angle (theoretical): when stationary 77° when driving 10°

Alternatively

1. Speed range (reverse): > or = 40 km/h
2. Swivel angle (theoretical): when stationary and when driving below a certain value

Alternatively

1. Vehicle skids and swings out.

Alternatively

1. Front foglights are switched on with the front foglights switch.

Preconditions For Activation

The control unit for adaptive headlights is "awake" from terminal 15 ON.

The movement of the lights is subject to the following conditions

1. Reverse gear must not be engaged.
2. The system is free of faults (indicator lamp not flashing and no Check-Control message)
3. The bulbs for the bi-xenon lights are OK in both headlights.
4. The vehicle must not be skidding or fishtailing.
5. The rain - light sensor must detect darkness.
6. Additional precondition for activation: automatic driving lights control is active (light switch in position "A", see above).

Notes for service staff

1. General note: See «E60, E61, E63, E64, E65, E66, E90 - ADAPTIVE HEADLIGHTS, GENERAL INFORMATION FOR SERVICE STAFF»(/bmw/m6/e63e64-2005-2010/remont/exterior-lights/#lights-service-information__e60-e61-e63-e64-e65-e66)
2. Diagnosis: See «E60, E61, E63, E64, E65, E66, E90 - ADAPTIVE HEADLIGHTS DIAGNOSIS»(/bmw/m6/e63e64-2005-2010/remont/exterior-lights/#lights-service-information__e60-e61-e63-e64-e65-e66)
3. Encoding/programming: See «E60, E61, E63, E64, E65, E66, E90 - ENCODING/PROGRAMMING ADAPTIVE HEADLIGHTS»(/bmw/m6/e63e64-2005-2010/remont/exterior-lights/#lights-service-information)
4. Car and Key Memory: > E60, E61, E63, E64, E65, E66 The sensitivity of the driving light sensor can be set to one of 2 settings with the Car and Key Memory. > E70, E81, E87, E90, E91, E92, E93 All Car and Key Memory functions are programmed inside the vehicle itself. (Please refer to the "Personal profile" section of the Owner's Handbook: Personal settings for a maximum of 3 remote control units via the display in the instrument cluster or via the Central Information Display.)

National Versions

The options "Daytime driving lights" and "Manual headlight - range adjustment" are available in certain countries. Vehicles with manual headlight-range adjustment do not have adaptive headlights. This is because vehicles with manual headlight - range adjustment have halogen dipped headlights. Adaptive headlights (option 524) are only available in conjunction with option 522 "Xenon dipped and main - beam headlights".

Switching on adaptive headlights in conjunction with daytime driving lights function

The "Daytime lights" option (Northern Europe and Canada) means that dipped-beam headlights and side lights (E70, E92, E93: daytime driving lights) are always switched on

1. Light switch in position "2"
2. Terminal 15 ON

The automatic headlight - range adjustment is active (actuated by the control unit for adaptive headlights).

If terminal 15 is switched off, the dipped headlights and the side lights are automatically switched off as well.

The light switch must also be set to position "A" with the "Daytime driving lights" option. The control unit for adaptive headlights is then in standby.

System functions for "Daytime lights" option when the light switch is set to position "A"

1. If the vehicle is encoded with the "Daytime driving lights" option (end of production line), the light switch can remain in position "A" at all times. When terminal R is switched on, the side lights, parking lights and licence plate lighting are switched on. As soon as terminal 15 is switched on, the dipped headlights are also switched on.
2. When the dipped headlights are switched on, the control unit for adaptive headlights is activated (for automatic headlight-range adjustment).
3. The indicator lamp on the light switch lights up and indicates that the system is functional.
4. The adaptive headlights turn when the vehicle is stationary if the steering wheel is turned (to the right only).
5. The headlights are moved when the vehicle corners if the rain - light sensor registers darkness.

The switch-on conditions for the adaptive headlights in conjunction with special equipment "Daytime driving lights" are as follows

1. The vehicle must be encoded with the "Daytime driving lights" option (end of production line)
2. The light switch must be in position "A"
3. Terminal 15 must be switched on and reverse gear must not be engaged
4. Rain-light sensor must detect darkness

Subject to change.

Scheme 152

The main-beam assistant assists the driver to operate the main-beam headlights. The main-beam assistant automatically switches the main-beam headlights on and off as the traffic situation changes.

The main-beam assistant detects vehicles travelling ahead of the car and oncoming traffic, and it also detects lighted stretches of roadway. By automatically switching off the main-beam headlights in good time, the main - beam assistant ensures that the occupants of oncoming vehicles, for example, are not dazzled by the headlights.

Advantages

Drivers do not have to concern themselves with the job of operating the main - beam headlights. This enhances the level of convenience for drivers. The main - beam headlights are switched on more frequently by the main-beam assistant than is the case with manually operated main-beam headlights. The driver's field of vision is optimally illuminated. Driving in the dark, therefore, is rendered safer.

Option 5AC "Main-beam assistant" is available for the BMW 3, 5, 6 and 7-Series.

1. > E60, E61, E63, E64, E65, E66 - See «SYSTEM OVERVIEW FOR THE MAIN-BEAM ASSISTANT: E60, E61, E63, E64, E65, E66»(/bmw/m6/e63e64-2005-2010/remont/exterior-lights/#lights-service-information)

Note. Only the main beam of the bi-xenon headlights are switched on. If a main-beam assistant is fitted, only the main beam of the bi-xenon headlights are switched on. The halogen headlights are switched on only when the headlight flasher is actuated. In countries in which daytime driving lights are required by law, the halogen headlights are used for the daytime driving lights.

The following components and control units provide input signals for the main - beam assistant

1. Light switch The main-beam assistant can be activated only when the light switch is in position "A". "A" stands for "automatic headlight control".
2. Turn-signal/main-beam switch The main-beam assistant is activated and deactivated by mans of the turn-signal/main-beam switch. See the section entitled «OPERATION»(/bmw/m6/e63e64-2005-2010/remont/exterior-lights/#lighting-systems-overview__operation) below.
3. Rain-light sensor The rain - light sensor measures the brightness of the ambient light. The light module switches the dipped headlights on when daylight fails. The main-beam assistant can be activated only when the dipped headlights are on. The precondition is that the light switch must be in the "A" position.
4. Wheel-speed sensors Each of the wheel-speed sensors measures the circumferential speed of an individual wheel. The DSC control unit (DSC: Dynamic Stability Control) uses these input signals to calculate the car's road speed. The main-beam headlights are switched on when the car's road speed is above 50 km/h. The main-beam headlights are switched off when the car's road speed is below 38 km/h.
5. DSC sensor The DSC sensor registers lateral acceleration and calculates the yaw rate. ("Yaw" is the movement of the vehicle about the vertical axis, e.g. when the car is cornering). The main-beam assistant uses the yaw rate to improve evaluation when the car corners. The DSC sensor is underneath the driver's seat. For safety reasons, cars with active front steering have a second DSC sensor underneath the front passenger's seat.
6. Image sensor The image sensor is a special camera for detecting light sources. The image sensor transmits images to the control unit for the main - beam assistant. The images are carried by an LVDS data line (LVDS: Low Voltage Differential Signalling). The control unit for the main-beam assistant analyses the images. The image sensor and the control unit are installed in a common housing and can only be supplied as a unit. See «IMAGE SENSOR FOR THE MAIN-BEAM ASSISTANT: E60, E61, E63, E64, E65, E66»(/bmw/m6/e63e64-2005-2010/remont/exterior-lights/#lights-service-information__image-sensor-for-the-main-beam-assistant)
7. Reverse gear switch The main-beam headlights are not switched on if reverse gear is engaged. In a manual-shift car, the reverse gear switch supplies the "reverse gear engaged" information. The reverse gear switch sends this information to the light module.
8. Selector lever position switch The main-beam headlights are not switched on if reverse gear is engaged. In a car fitted with electronic transmission control (EGS), the selector lever position switch supplies the "reverse gear engaged" information. The selector lever position switch sends this information to the EGS control unit. The EGS control unit sends this information to the light module or footwell module.
9. Selector angle sensor and shift travel sensor > E60, E61, E63, E64, E65, E66 The main-beam headlights are not switched on if reverse gear is engaged. In a car fitted with sequential manual transmission (SMG), the selector angle sensor and the shift travel sensor supply the "reverse gear engaged" information. The selector angle sensor and the shift travel sensor send the information to the SMG control unit. The SMG control unit sends the information to the light module.

The following control units are involved in the main-beam assistant system

1. FLA: Main-beam assistant The FLA control unit analyses the images from the image sensor. The FLA control unit receives information on road speed and yaw rate from the DSC control unit. The FLA control unit sends a switch-on recommendation or a switch-off recommendation for the main-beam headlights to the light module. The recommendation depends on the traffic situation, the ambient light, and the car's road speed. The FLA control unit is connected to the K-CAN. See «FLA CONTROL UNIT FOR THE MAIN-BEAM ASSISTANT: E60, E61, E63, E64, E65, E66»(/bmw/m6/e63e64-2005-2010/remont/exterior-lights/#lights-service-information__fla-control-unit-for-the-main-beam)
2. LM: Light module > E60, E61, E63, E64, E65, E66 The light module receives various input variables for the main-beam headlights: Switch-on or switch-off recommendation from the FLA control unit Switch position of the light switch Switch position of the direction indicator/mean - beam switch Information from the reverse gear switch or the selector lever position switch or the selection angle and shift travel sensor Information from the rain-light sensor, as to whether the dipped headlights have to be switched on On the basis of the input variables, the light module decides whether the main-beam headlights should be switched on or off. The light module actuates the bi-xenon headlights. The light module actuates the FLA indicator light in the instrument cluster. A Check-Control symbol appears if the main - beam assistant fails. The light module is connected to the K-CAN.
3. FRM: Footwell module > E90, E91, E92, E93, E70 The footwell module receives various input variables for the main - beam headlights: Switch-on or switch-off recommendation from the FLA control unit Switch position of the light switch Switch position of the direction indicator/mean-beam switch Information from the reverse gear switch or selector lever position switch Information from the rain-light sensor, as to whether the dipped headlights have to be switched on On the basis of the input variables, the footwell module decides whether the main-beam headlights should be switched on or off. The footwell module actuates the bi-xenon headlights. The footwell module actuates the FLA indicator light in the instrument cluster. A Check-Control symbol appears if the main-beam assistant fails. The footwell module is connected to the K-CAN.
4. DSC: Dynamic Stability Control The DSC control unit calculates the car's road speed using the signals from the wheel-speed sensors. The DSC control unit sends the information on road speed to the main - beam assistant. The DSC control unit also sends the information from the yaw-rate sensor in the DSC sensor to the main-beam assistant.
5. EGS or SMG: Electronic gearbox control or sequential manual transmission The EGS control unit receives the "Reverse gear engaged" information from the selector lever position switch. The EGS control unit is connected to the PT-CAN. The SMG control unit receives the "Reverse gear engaged" information from the selector angle sensor and the shift travel sensor. The SMG control unit is connected to the PT-CAN.
6. SZL: Steering Column Switch The switch signals from the turn - signal/main-beam switch are picked up and evaluated by the SZL control unit. The SZL control unit sends the position of the turn-signal/main-beam switch to the light module (E60, E61, E63, E64, E65, E66) or footwell module (E90, E91, E92, E93, E70)

The following components are controlled

1. Bi-xenon headlights The bi-xenon headlights are actuated by the light module.

Note. Only the main beam of the bi-xenon headlights are switched on. If a main-beam assistant is fitted, only the main beam of the bi-xenon headlights are switched on. The halogen headlights are switched on only when the headlight flasher is actuated. In countries in which daytime driving lights are required by law, the halogen headlights are used for the daytime driving lights.

1. Instrument cluster The indicators in the instrument cluster are as follows: Main-beam indicator lamp (legally stipulated, blue) FLA indicator light Orange on BMW 3, 5 and 6-Series and on X5 Blue on BMW 7-Series Check-Control symbol for failure of the main-beam assistant (yellow) See the section entitled «SYSTEM FUNCTIONS»(/bmw/m6/e63e64-2005-2010/remont/exterior-lights/#lighting-systems-overview) below.

The following components provide the power supply for the main - beam assistant

1. PM: Power module > E65, E66 In the BMW 7-Series, the power module supplies power to the main - beam assistant.
2. Rear power distributor > E60, E61, E63, E64 In the BMW 5-Series and 6-Series, the rear power distributor supplies power to the main-beam assistant.
3. Power distributor in junction box > E90, E91, E92, E93 On the BMW 3-Series, the power distributor in the junction box supplies voltage to the main - beam assistant.
4. Rear power distributor > E70 On the BMW X5, the rear power distributor provides power to the main - beam assistant.

In accordance with the traffic situation, the FLA control unit sends a switch - on recommendation or a switch - off recommendation for the main - beam headlights to the light module or footwell module. On the basis of this recommendation and various other the input variables, the light module or footwell module decides whether the main-beam headlights should be switched on or off.

The following system functions of the main - beam assistant are described

1. Automatic main-beam headlight switch - off when oncoming traffic is detected
2. Automatic main-beam headlight switch - off when vehicle detected ahead of the car
3. Automatic main-beam headlight switch - off when adequate ambient lighting is detected
4. Automatic main-beam headlight switch - on
5. Indicators in the instrument cluster
6. Function limitations of the main - beam assistant
7. Automatic alignment of the main - beam assistant

Automatic Main - Beam Headlight Switch-Off When Oncoming Traffic Is Detected

The light cone of the main - beam headlights has a range of about 400 m. The image sensor can detect other light sources within a range of about 1000 m. This ensures that the image sensor detects oncoming vehicles before their drivers can be dazzled by the light cone of the main - beam headlights.

When the image sensor detects an oncoming vehicle, the FLA control unit sends a switch - off recommendation to the light module or footwell module. The light module or footwell module switches the main - beam headlights off.

Automatic Main - Beam Headlight Switch-Off When Vehicle Detected Ahead Of The Car

When the image sensor detects a vehicle ahead, the FLA control unit sends a switch - off recommendation to the light module or footwell module. The light module or footwell module switches the main - beam headlights off.

Automatic Main - Beam Headlight Switch-Off When Adequate Ambient Lighting Is Detected

When the image sensor detects an environment in which ambient lighting is adequate, the FLA control unit sends a switch-off recommendation to the light module or footwell module. The light module or footwell module switches the main-beam headlights off.

Adequate ambient lighting means

1. Daylight
2. Twilight
3. Street lighting (e. g. in illuminated towns)

Automatic Main-Beam Headlight Switch-On

If there is no reason for the lights to be dipped, the light module or footwell module switches the main-beam headlights on. The bi-xenon headlights are switched to full beam.

Displays In The Instrument Cluster

The FLA indicator light lights up in the instrument cluster as soon as the main-beam assistant is activated (blue on the BMW 7-Series, orange on the BMW 3, 5, and 6-Series and on the X5).

The main-beam indicator light also lights up (blue) in the usual way as soon as the main-beam headlights are switched on.

A Check-Control symbol appears (yellow) if the FLA control unit detects a system failure.

See INDICATORS FOR THE MAIN-BEAM ASSISTANT AND THE MAIN-BEAM HEADLIGHTS: E60, E61, E63, E64, E65, E66

Function Limitations Of The Main-Beam Assistant

The main-beam assistant can be subject to function limitations under the following circumstances

1. Inclement weather conditions (e.g. fog)
2. Poorly lighted road users (e.g. cyclists, pedestrians)
3. Certain road signs (e.g. the warning sign for a tight bend): Reflections from traffic signs may be incorrectly interpreted by the main - beam assistant as a vehicle driving ahead or as oncoming traffic. See «FUNCTION LIMITATIONS OF THE MAIN-BEAM ASSISTANT»(/bmw/m6/e63e64-2005-2010/remont/exterior-lights/#lights-service-information__function-limitations-of-the-main-beam-assistant)
4. Driving over crests and through dips See «FUNCTION LIMITATIONS OF THE MAIN-BEAM ASSISTANT»(/bmw/m6/e63e64-2005-2010/remont/exterior-lights/#lights-service-information__function-limitations-of-the-main-beam-assistant)
5. Certain traffic situations (e.g. tight bends, vehicles approaching from the side)
6. Image sensor's field of view obstructed (e.g. by snow)

Automatic Alignment Of The Main-Beam Assistant

In order to operate correctly, the image sensor must be aligned parallel with the vehicle's centerline. When the car is driven at night, the main - beam assistant can automatically correct alignment up to 3° to the left or 3° to the right. This correction compensates for minor deviations from the centerline.

Driving conditions for automatic directional orientation of the main - beam assistant are

1. Straight ahead for a distance of approx. 50 km: A relatively straight stretch accelerates the directional orientation.
2. Road marking must be clearly visible.

See IMAGE SENSOR FOR THE MAIN-BEAM ASSISTANT: E60, E61, E63, E64, E65, E66

Operation

Operation of the main-beam assistant is described in a separate section.

The following controls of the main - beam assistant are described

1. Switching on automatic headlight control
2. Activating the main - beam assistant
3. Deactivating the main-beam assistant
4. Reactivating the main-beam assistant
5. Switching on the headlight flasher

See OPERATION

For technical reasons, distinctions are drawn between the following conditions required for switch - on

1. Conditions required for switch-on for the FLA control unit
2. Conditions required for switch-on for the main-beam assistant
3. Conditions required for switch-on for the main-beam headlights

Conditions Required For Switch - On For The FLA Control Unit

The FLA control unit is active as of terminal 15 ON.

Conditions Required For Switch - On For The Main-Beam Assistant

1. Light switch set to position "A"
2. Dipped headlights switched on. When the switch is in position "A", the dipped headlights are switched on by the automatic headlight control.
3. Turn-signal/main-beam switch pressed forward (in forward direction of travel).

Conditions Required For Switch - On For The Main-Beam Headlights

1. Road speed greater than 50 km/h.
2. Reverse gear must not be engaged.
3. Image sensor does not detect an oncoming vehicle or a vehicle ahead.
4. Image sensor detects adequate darkness.

Notes for service staff

The following information is available for service staff

1. General note: See «MAIN-BEAM ASSISTANT, GENERAL INFORMATION FOR SERVICE STAFF: E60, E61, E63, E64, E65, E66»(/bmw/m6/e63e64-2005-2010/remont/exterior-lights/#lights-service-information__main-beam-assistant-general-information-for-service)
2. Diagnosis: See «MAIN-BEAM ASSISTANT DIAGNOSIS: E60, E61, E63, E64, E65, E66»(/bmw/m6/e63e64-2005-2010/remont/exterior-lights/#lights-service-information__main-beam-assistant-diagnosis-e60-e61-e63)
3. Encoding/programming

See also:
• SYSTEM OVERVIEW OF ADAPTIVE HEADLIGHTS (E60, E61, E63, E64, E65, E66 UP TO 03/2005)
• LIGHT SWITCH
• DIRECTION INDICATOR/MAIN-BEAM SWITCH
• SZL: STEERING COLUMN SWITCH CLUSTER
• E60, E61, E63, E64, E65, E66, E90 - RIDE-HEIGHT SENSORS
• POSITION SENSOR
• ZERO-POSITION SENSOR
• RAIN-LIGHT SENSOR FOR AUTOMATIC DRIVING LIGHTS CONTROL
• AHL: ADAPTIVE HEADLIGHTS
• E60, E61, E63, E64 FROM 03/2005
• E65, E66 (FROM 03/2005)
• FRM: FOOTWELL MODULE
• SMC: STEPPER MOTOR CONTROLLERS
• POSITIONER MODULES
• IMAGE SENSOR FOR THE MAIN-BEAM ASSISTANT: E60, E61, E63, E64, E65, E66
• FLA CONTROL UNIT FOR THE MAIN-BEAM ASSISTANT: E60, E61, E63, E64, E65, E66
• INDICATORS FOR THE MAIN-BEAM ASSISTANT AND THE MAIN-BEAM HEADLIGHTS: E60, E61, E63, E64, E65, E66
• FUNCTION LIMITATIONS OF THE MAIN-BEAM ASSISTANT
• OPERATION
• MAIN-BEAM ASSISTANT, GENERAL INFORMATION FOR SERVICE STAFF: E60, E61, E63, E64, E65, E66
• MAIN-BEAM ASSISTANT DIAGNOSIS: E60, E61, E63, E64, E65, E66
• RIDE-HEIGHT SENSORS
• CAS: CAR ACCESS SYSTEM
• EGS CONTROL UNIT OR REVERSING LIGHT SWITCH
• SZL: STEERING COLUMN SWITCH
• STEERING-ANGLE SENSOR AND DSC SENSOR
• OPERATION
• SYSTEM FUNCTIONS