Collision/cruise Control - Service Techniques: Overview BMW 6 series E63/E64 facelift

Scheme 25

Brief Description Of Components

The following components are described for Comfort Access

1. Interior and exterior aerials Different aerials are required for communication with the ID transmitter: Interior and exterior aerials The number of aerials depends on the model concerned: INTERIOR AND EXTERIOR AERIALS REFERENCE TABLE Interior aerials E60 E61 E63 E64 E70 E87 E90 E91 E92 E93 Front center console x x x x x x x x x x Rear center console x x x x x x x x x x Rear window shelf (parcel shelf) x - x - - - - - - - Back of rear seat - x - - - - - - - - Luggage compartment, middle x - x x - x x x x x Luggage compartment, right - - x x x - - - - - Luggage compartment, left - - - - x - - - - - Luggage compartment, load edge - x - - - - - - - - Exterior aerials E60 E61 E63 E64 E70 E87 E90 E91 E92 E93 Rear bumper, left x - x x - - - - - - Rear bumper, middle - x - - x x x x x x Outside door handle electronics 4 4 2 2 4 2 2 2 2 2 The aerials emit 125 kHz radio signals which are evaluated by the ID transmitter.
2. Outside door handle electronics The number of outside door handle electronic units depends on the model concerned (see «INTERIOR AND EXTERIOR AERIALS REFERENCE TABLE»(ref-263517-S07828800652007090700000) ). The 3 sensors in the outside door handle electronics send the following signals to the CAS control unit and the CA control unit: Unlock: When a hand reaches into the handle recess via capacitive sensor 1 Unlock: When a hand pulls on the outside door handle via tension sensor (redundant to capacitive sensor 1) Locking and deadlocking: On contact with the sensitive area of the door handle via capacitive sensor 2 A built-in aerial also sends radio signals in order to check for an ID transmitter located on the outside of the driver's door or front-passenger door. > E70, E87, E90, E91, E92, E93 The outside door handle electronics are installed in the outside door handle. > E60, E61, E63, E64 The outside door handle electronics are behind the grip recess plate.
3. ID transmitter The ID transmitter evaluates the signals from the aerials. It also sends high-frequency radio signals to the FBD receiver. Inserting the ID transmitter into the insert compartment deactivates all Comfort Access functions.
4. Remote control receiver for remote control services > E64, E87, E93 The remote control receiver is integrated in the interior mirror. > E60, E61, E63, E70, E90, E91, E92 The remote control receiver is integrated into the aerial amplifier. The remote control (FBD) receiver picks up radio signals from the ID transmitter and forwards them to the CAS control unit. The Comfort Access control unit (CA control unit) activates the FBD receiver.
5. CAS control unit The CAS control unit (CAS: Car Access System) is the master control unit for all Comfort Access functions. The CAS control unit is the interface to the START/STOP button and to the insert compartment for the ID transmitter. The electronic steering lock is also activated by the CAS control unit. The CAS control unit is connected with the following components via the K-bus (sub-bus): Outside door handle electronics (number depends on model concerned) Comfort Access control unit (CA control unit) Electronic steering lock When the vehicle is idle, communication may take place on the K-bus without waking up the vehicle.
6. START/STOP button The START/STOP button can be used to switch the terminals in sequence (0, R, 15, R, 0). The engine can be started by depressing the clutch or the brake (manual transmission/automatic transmission) and pressing the START-STOP button.
7. Insert compartment for the ID transmitter/remote control On vehicles without Comfort Access: In order to start the engine, the remote control must be latched in place in the insert compartment. On vehicles with Comfort Access: The remote control must be inserted into the insert compartment if the battery in the ID transmitter is discharged. The engine can then be started up. Inserting the ID transmitter into the insert compartment deactivates Comfort Access.
8. JBE: Junction box electronics > E70, E87, E90, E91, E92, E93 The junction box electronics activates the central locking system. If the CAS control unit approves the unlocking of the vehicle, for example, the doors will be unlocked.
9. KGM and KBM: Body gateway module and body basic module > E60, E61, E63, E64 The body gateway module actuates the central locking in the front doors. The body basic module controls the central locking in the rear doors. If the CAS control unit approves the unlocking of the vehicle, for example, the doors will be unlocked.
10. Comfort Access control unit The Comfort Access control unit (CA control unit) actuates the internal and exterior aerials. An ID transmitter scan is carried out. At the same time, the FBD receiver is activated for any ID transmitters which may respond. > E60, E61, E63, E64 > E70 > E87, E90, E91, E92, E93

The following BMW Night Vision components are described

1. Night-vision camera The night-vision camera is located at the front left in the bumper. The night-vision camera is a "heat detector camera". An image sensor in the night-vision camera picks up infrared radiation emitted by objects. Software processes the signals in into a visible image on the Control Display or Central Information Display. The night-vision camera transmits analog video signals to the night-vision electronics through 2 wires. The night-vision camera is connected to the night-vision electronics by a LIN bus.
2. Night-vision electronics The night-vision electronics form the actual control unit for the system. The night-vision electronics convert the image signals from the night-vision camera into an FBAS signal (Composite Video Burst Synchronization). > E60, E61, E63, E64 - Depending on the equipment fitted, the FBAS wire is connected to the Car Communication Computer or the video module. > E65, E66: Depending on the equipment fitted, the FBAS wire is connected to the navigation system or the video module. The night-vision electronics activate the power supply for the night-vision camera.
3. Button for BMW Night Vision The button for BMW Night Vision is used to switch the system on and off. The button is located next to the light switch. > E60, E61, E63, E64 On vehicles with iDrive, the system can also be switched on and off with one of the programmable buttons on the steering wheel. BMW Night Vision can also be activated using the voice recognition system (SVS).

The following control units are involved in BMW Night Vision

1. Display > E60, E61, E63, E64: Central Information Display (CID) The image recorded by the night-vision camera appears on the Central Information Display (black-and-white image). > E65, E66: Control display (CD) The image recorded by the night-vision camera appears on the Control Display (black-and-white image). The scale of the display is computed by the Control Display: split screen display <-> full screen display. A menu for BMW Night Vision can be called up on the Display. Personal settings can be made in this menu.
2. CCC: Car Communication Computer > E60, E61, E63, E64 The scale of the image on the Central Information Display is calculated by the Car Communication Computer: split screen display <-> full screen display.
3. NAV: Navigation system > E60, E61, E63, E64 If no video module is fitted, the FBAS wire from the Night-Vision electronics is connected to the Car Communication Computer. The Car Communication Computer then transmits the image signals to the Central Information Display via an LVDS data wire. > E65, E66 If the vehicle does not have a video module, or does have a rear entertainment system, the FBAS wire from the night -vision electronics will be connected to the navigation system. In such cases, the navigation system will transmit the image signals to the Control Display via an RGB wire.
4. VM: Video module On vehicles with television, the FBAS wire from the night-vision electronics is connected to the video module. > E60, E61, E63, E64 (EURO version) The video module transmits the image signals to the Car Communication Computer (CCC) via an FBAS wire. > E60, E61, E63, E64 (Japan version) The video module transmits the image signals to the Car Communication Computer (CCC) via an RGB wire. > E65, E66 The video module transmits the image signals to the Control Display (CD) via an RGB wire. > E65, E66 (US version) The video switch supersedes the video module.
5. DSC: Dynamic Stability Control The DSC control unit transmits the following signals through the PT-CAN: Vehicle road speed Steering angle Yaw rate The night-vision electronics needs these signals, for example for the zoom function and to pan an image section.
6. LM: Light module > E60, E61, E63, E64 The light module transmits a message through the K-CAN as to whether or not the driving lights are switched on. > E65, E66 The light module transmits a message through the K-CAN SYSTEM as to whether or not the driving lights are switched on. On vehicles with Night Vision, the load status is also transmitted to the night-vision electronics. The light module calculates the load status from the ride-height sensor signals.
7. RLS: Rain-light sensor The rain-light sensor detects the brightness of the ambient light and precipitation. > E60, E61, E63, E64 The rain-light sensor transmits its signals to the night-vision electronics via the K-CAN. > E65, E66 The rain-light sensor transmits its signals to the night-vision electronics via the K-CAN SYSTEM.

The Active Cruise Control option consists of the following components

1. ACC sensor with control unit The ACC sensor and control unit form a single unit. The ACC sensor monitors the distance, angle and relative speed of vehicles driving ahead. (Relative speed: The relative speed is the difference in speed between the two moving objects, i.e. relative to each other.) The ACC sensor is a radar sensor. The ACC sensor has a limited monitoring range (approximately 120 meters). (See «ACC SENSOR WITH CONTROL UNIT: E60, E61, E63, E64, E65, E66»(ref-202165-S16890203452006033000000) )
2. Cruise-control system steering-column stalk Cruise control is set and called up using the Active Cruise Control system steering-column stalk. (See «STEERING COLUMN STALK FOR ACTIVE CRUISE CONTROL: E60, E61, E63, E64, E65, E66»(ref-202165-S30938563572006033000000) )
3. 2 brake pressure sensors A brake pressure sensor is installed in each of the front and rear axle brake circuits. The signals from the brake pressure sensors are evaluated by the Dynamic Stability Control. If Active Cruise Control is in use, the vehicle will be braked as necessary by the Dynamic Stability Control (DSC) (not DSC intervention). The brake pressure sensors all the brake pressure, which is often only very slight, to be regulated to the front and rear axles Vehicles with DSC 8Plus: The brake pressure sensors have been discontinued on vehicles with DSC 8Plus. DSC 8Plus is an advanced development of the familiar DSC 8.

In addition, the ACC control unit communicates with the following control units

1. DME or DDE: Digital engine electronics or digital diesel electronics The DME/DDE controls the engine intervention. The following data is transmitted by the ACC sensor to the DME or DDE: Current torque request The following data are transmitted from the DME or DDE to the ACC sensor: Driver's command (signals from accelerator pedal module)
2. SGM: Safety and gateway module > E65, E66 as well as E60, E61, E63, E64 up to 09/2005: The SGM is the gateway (= data interface) between: PT CAN K-CAN Byte flight The diagnosis lead is also connected at the SGM. > E60, E61, E63, E64 from 09/2005 The body-gateway module replaces the safety and gateway module (SGM).
3. KGM: Body-gateway module > E60, E61, E63, E64 from 09/2005 The KGM is the gateway (= data interface) between: PT CAN K-CAN The diagnosis lead is also connected at the KGM.
4. DSC: Dynamic Stability Control The current status of the vehicle is detected by the DSC, for example by evaluating the following sensor signals: Rate of yaw (measure of movement of the car about its vertical axis) Steering angle Information on the brake pressure Circumferential wheel speed DSC then transmits data about current operating conditions to the ACC sensor. The following data are transmitted by the ACC sensor to the DSC: Request for vehicle deceleration: DSC receives the request for vehicle deceleration from the Active Cruise Control via the PT-CAN. DSC reduces the speed. To do this, DSC intervenes in the brake system. (goal: comfortable vehicle deceleration. No DSC intervention in the sense of enhanced operating stability.) With automatic braking, the brake lights are actuated depending on the vehicle deceleration and the gradient of the road (legally prescribed).
5. FPM: Accelerator pedal module The accelerator pedal module signals the driver's command. This signal is required to check the respective driving status. (evaluation via DME/DDE) By pressing the accelerator pedal, the speed set point of the Active Cruise Control can be overridden at any time.
6. Brake light switch The brake light switch tells the active cruise control when the brake pedal has been pressed. Active Cruise Control is deactivated if braking actions are necessary.
7. Clutch mode (manual transmission only) Clutch engagement/disengagement is recognized by the signal from the clutch module. During the clutch engagement/disengagement process, the engine speed is maintained at an optimal speed range by the DME or DDE. After the clutch has been reengaged, the DME/DDE will adjust back to the current torque request from the Active Cruise Control. If the engine speed is too high or too low, an audible signal and a check control message prompt the driver to change gear. The prompt to upshift when the engine speed is too high is only made during the warm-up phase of the engine. If no gearshift or change in engine speed is made within approx. 5 seconds of such a signal being given, active cruise control will be deactivated. If the clutch is disengaged for longer than about 6 seconds, Active Cruise Control (ACC) will be deactivated. Active cruise control cannot be activated in 1st gear. Active cruise control is automatically deactivated in the "neutral gate" (i.e. no gear engaged and clutch not depressed).

Active Cruise Control has a variant coding which is co-ordinated with the differential ratio. If a different rear differential unit is installed, it may be the case that the Active Cruise Control will deactivate itself in manual transmissions, particularly in the higher gears. In this case, no fault is entered in the fault memory.

1. EGS and SMG: electronic transmission control and sequential manual transmission Electronic transmission control The electronic transmission control evaluates the data from the DME/DDE and ACC sensor. The adaptive transmission control (constituent component of electronic transmission control) adapts the shift characteristics of the driving program to the driver's commands and the driving situation. Sequential manual gearbox No automatic upshift in manual mode. In order to prevent excessively high engine speeds, an audible signal and check control message prompt the driver to change gear. The prompt to upshift when the engine speed is too high is only made during the warm - up phase of the engine. The following data are transmitted from the EGS or SMG to the ACC sensor: Gear engaged status information about gearshifts The ACC sensor transmits the following data to the EGS/SMG: Current operating status Current torque request
2. LM: Light module When active cruise control is in operation, the brake lights are actuated during automatic braking (legal requirement). This requires a signal sent via the K-CAN to the light module. Active cruise control uses the "turn signals" signal from the light module for assistance when changing lanes. In other words, if a left turn signal is given before overtaking, the distance to the vehicle in front is reduced. The vehicle to be overtaken is "ignored" more easily. Conversely, when you move back into the right lane, vehicles being driven there will be monitored more quickly.
3. SZL: Steering column switch cluster The SZL processes all data from the cruise-control system steering-column stalk. > E65, E66 as well as E60, E61, E63, E64 before 09/2005 The SZL is connected to the safety and gateway module (SGM) via the byte flight. The SGM creates the connection to the bus system. > E60, E61, E63, E64 from 09/2005 The SZL is connected to the bus system via the PT-CAN.
4. Displays in the instrument cluster For Active Cruise Control, the following displays are available in the instrument cluster: Set speed via an indicator disc (Set speed = selected km/h of the cruise control system) Monitored vehicle (Display through lit up icon) Request for action to driver Display through flashing icon. In addition, an audible warning is made.) Selected distance from vehicle driving ahead (Display via icon) The LC display briefly shows the newly selected set speed (approximately 6 seconds). Check control message in LC display (See «ACTIVE CRUISE CONTROL DISPLAYS IN INSTRUMENT CLUSTER: E60, E61, E63, E64, E65, E66»(ref-202165-S42854628672006033100000) )
5. M-ASK or CCC and CID:Multi-audio system controller/Car Communication Computer and Central Information Display > E60, E61, E63, E64 only For the instrument cluster, the M-ASK and CCC serve as an interface to the Central Information Display (CID). Amongst other things, the CID displays detailed information about the check control messages. To back up the check control message, the M-ASK/CCC emit acoustic warnings through the loudspeakers (depending on national version). The instrument cluster assumes control over these warnings via the K-CAN. CCC with Professional navigation system option 609: Only in the combination of CCC with Professional navigation system option 609 are the additional scopes of operation possible for the dynamics control behavior.
6. CD: Control display > E65, E66 only The control display is the central display for the information and communication system. The control display is used as an interface between the MOST and K-CAN data buses. (MOST stands for "Media Oriented System Transport"; K-CAN stands for "Body Controller Area Network".) Amongst other things, the control display displays detailed information about the check control messages. The instrument cluster controls these warnings by means of the K-CAN.
7. CAS: Car Access System The CAS provides input signals relating to terminal status (e.g. terminal 15 ON).
8. HUD: Head-up display > E60, E61, E63, E64 only The Head-up display (option 610) displays the following information: Set speed Object ahead monitored Request for action to driver Timed separation setting Check control messages

Operation

Operation of the Active Cruise Control option is described in the Owner's Handbook.

National versions

US and CDN national versions

Different timed separations encoded for following mode (1.5 - 1.8 - 2.2 - 2.5 seconds)

US and GB national versions

Active cruise control is effective in the speed range 20 mph to 110 mph.

Speed can be selected in steps of 1 mph and 5 mph.

Scheme 26

PDC consists of the following components

1. 8 ultrasonic sensors There are 4 ultrasonic sensors in each of the front and rear bumpers. The ultrasonic sensors emit ultrasonic impulses. These ultrasonic impulses are reflected by obstacles (echo impulses). The ultrasonic sensors receive and amplify these echo impulses. The amplified echo impulses are then converted into a digital signal. Each ultrasonic sensor has its own microprocessor, its own power supply and its own data connection to the PDC control unit. (See «E60, E61, E63, E64 - PARK DISTANCE CONTROL ULTRASONIC SENSORS»(ref-202165-S27615878742006040300000) )

The measuring range of the ultrasonic sensors is between approx. 25 centimeters and a maximum of approx. 200 centimeters. If the minimum distance that can be detected rises to an impermissible level, a fault message is entered in the fault memory.

Dirt contamination, moisture, ice and snow can cause an impermissible rise in the minimum distance that can be detected.

Note. Cleaning the ultrasonic sensors To make sure the system remains fully operational, keep the ultrasonic sensors clean and free from ice. Do not clean by spraying high-pressure washers directly at the ultrasonic sensors. When cleaning, always maintain a minimum distance of at least 10 centimeters.

1. PDC button The PDC button is in the center console switch cluster. The signal from the PDC button is transferred through the K-CAN to the PDC control unit. The PDC button is used to manually switch the Park Distance Control system on and off. When the PDC is switched on, the function LED in the PDC button lights up. If a fault develops in the PDC, the function LED in the PDC button flashes.
2. PDC control unit The PDC control unit controls the ultrasonic sensors for transmitting ultrasonic impulses. The PDC control unit also receives the digital signals from the individual ultrasonic sensors. By comparing the individual digital signals, the PDC control unit calculates the minimum distance between the ultrasonic sensor and the object. When an object is detected, an acoustic warning and a visual warning are given. (See «E60, E61, E63, E64 - PDC CONTROL UNIT»(ref-202165-S15387505902006040300000) )

The PDC control unit is connected to various other control units via the bus systems

1. Multi-audio system controller/Car Communication Computer The multi-audio system controller (M-ASK) or Car Communication Computer (CCC) emits the PDC acoustic warning through the mid-range loudspeakers.
2. Central Information Display The visual PDC warnings are given in the Central Information Display (CID). In addition, information regarding a Check-Control message that may be present is shown.
3. Instrument cluster A current Check-Control message is indicated by a symbol in the LCD display in the instrument cluster. Moreover, the instrument cluster also provides the exterior temperature and the kilometer reading for the PDC control unit. Ice and frost can cause an unexpected response from the ultrasonic sensors. The response characteristics of the ultrasonic sensors changes depending on the exterior temperature. If a fault is stored in the fault memory, the kilometer reading and the exterior temperature are also stored.
4. DSC control unit The DSC control unit supplies the PDC with information about the road speed and distance travelled.
5. Electronic transmission control On vehicles with automatic transmission, the electronic transmission control (ESG) supplies the signal that reverse gear is engaged.
6. Light module On vehicles with manual transmission, the light module (LM) supplies the signal that reverse gear is engaged.
7. Car Access System The CAS control unit supplies the PDC with the terminal status (e.g.. terminal 15). For vehicles from 03/2004, power is supplied to the PDC control unit through terminal 30g (active) instead of terminal 15.
8. Trailer module (AHM) The trailer module sends a signal indicating whether or not the vehicle is towing a trailer. If a trailer is recognized, the acoustic and visual warnings for the rear bumper are deactivated.

The visual warning (display) is switched on in the Central Information Display (CID) as follows

1. "Settings (i)" menu
2. "Vehicle settings" menu
3. "PDC" menu
4. Activate "Display on"

Japanese national version

So long as reverse gear is engaged, an acoustic signal (reversing gong) is given via the multi-audio system controller (M-ASK) and the mid-range loudspeaker.

The reversing gong is deactivated immediately if the PDC detects an object in the effective range and emits its own acoustic warning.