Distance Systems, Cruise Control - Service Techniques: Overview BMW X5 M E70 рестайлинг

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BRIEF DESCRIPTION OF COMPONENTS

PDC consists of the following components

1. Ultrasonic sensors > E70 8 ultrasonic sensors with option 508: Park Distance Control (PDC), front and rear > E87, E90, E91, E92, E93 4 ultrasonic sensors with option 507: Park Distance Control (PDC), rear 8 ultrasonic sensors with option 508: Park Distance Control (PDC), front and rear > R56 4 ultrasonic sensors with option 507: Park Distance Control (PDC), rear There are 4 ultrasonic sensors in each of the front and rear bumpers. The ultrasonic sensors emit ultrasonic pulses. These ultrasonic pulses are reflected by obstacles (echo pulses). The ultrasonic sensors receive and amplify these echo pulses. The amplified echo pulses are then converted into a digital signal. Each ultrasonic sensor has its own electronics, its own power supply and its own data connection to the PDC control unit.

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.

Note. Make sure the decoupling element on ultrasonic sensor is correctly located. The respective decoupling element must be correctly located. Otherwise, transmission and reception will be impaired.

1. PDC button > E70, E87, E90, E91, E92, E93 The PDC button is integrated in the center console switch cluster (no control unit). The signal from the PDC button is read by the IHKA (or IHKR/IHR control unit) control unit. In turn, the IHKA control unit sends a signal on the K-CAN. 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 pulses. The PDC control unit also receives the digital signals from the individual ultrasonic sensors. From 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. > E70 > E87, E90, E91, E92, E93 > R56

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

1. RAD2, CHAMP, M-ASK or CCC: BMW "Professional" radio, Multimedia Platform, multi-audio system controller or Car Communication Computer > E70, E87, E90, E91, E92, E93 Depending on the equipment fitted, the audio master emits acoustic PDC warnings via the mid-range loudspeaker.
2. Radio Wave CD, Radio Boost CD or CCC: Radio Wave CD, Radio Boost CD or Car Communication Computer > R56 Depending on the equipment fitted, the audio master emits acoustic PDC warnings via the mid-range loudspeaker.
3. CID: Central Information Display > E70, E87, E90, E91, E92, E93 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.
4. KOMBI: Instrument cluster > E70, E87, E90, E91, E92, E93 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. The PDC control unit is then able to correct the calculated distance with a factor corresponding to the outside temperature.
5. KOMBI and CID: Instrument cluster and Central Information Display > R56 The instrument cluster has two section. The instrument cluster itself is in the middle of the dashboard. The auxiliary instrument is on the steering column. The KOMBI and the CID are both control units. These control units are plugged into one another an installed together in the dashboard. All equipment versions are connected to the auxiliary instrument via a K-bus. The auxiliary instrument is the gateway to the K-CAN. A current Check-Control message is indicated by a symbol in the LCD display in the auxiliary instrument. The instrument cluster provides the exterior temperature and the kilometer reading for the PDC control unit. The PDC control unit is then able to correct the calculated distance with a factor corresponding to the outside temperature.
6. EGS: Electronic transmission control On vehicles with automatic transmission, the electronic transmission control (ESG) supplies the signal that reverse gear is engaged. The PDC control unit activates PDC after a short delay (approx. 1 second). This prevents PDC from being unexpectedly activated on vehicles with automatic transmission, fro example when the selector lever is moved from "P" to "N" via "R".
7. DSC: Dynamic Stability Control The DSC control unit supplies the PDC with information about the road speed and distance travelled.
8. FRM: Footwell module On vehicles with manual transmission, the footwell module (FRM) supplies the signal that reverse gear is engaged.
9. CAS: Car access system The CAS control unit supplies the PDC with the terminal status (e.g. terminal 15).
10. AHM: Trailer module The trailer module (AHM) sends a signal indicating whether the vehicle is towing a trailer or if a rear carrier rack is fitted. If a trailer or rear carrier rack is recognized, the acoustic and visual warnings for the rear bumper are deactivated.

OPERATION

The visual warning (PDC 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"

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 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 table above). 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