Table of Contents E92 Complete Vehicle Subject Page Introduction .3 Body.5 Body Structure.6 Fenders and Rocker Panel Covers.7 Doors .8 Car Access System 3 with EWS4.9 Replacement of Control Units.9 Start Enable .12 Time-based Query .12 Key Memory Expansion in CAS3.13 Comfort Access.14 Legal Requirements .14 Manual Transmission Vehicles .14 Automatic Transmission Vehicles .14 Exterior Lighting.15 Welcome Lights.15 Daytime Running Lights.16 Light distribution in headlight for daytime running light function . .17 Deactivating the daytime running lights function .17 Cornering Lights .17 Advantages of the Cornering Light.18 Interior and Lighting .22 Seat Belt Extender.23 System Function .24 System Components .25 Seat Belt Extender Controller.25 Seat Belt Extender .26 Seat Belt Extender Motor.27 Easy-Entry Function .32 Changes to the BUS Network.39 Initial Print Date: 09/06 Revision Date: E92 Complete Vehicle Model: 328i, 335i Production: From Start of Production After completion of this module you will be able to: • Describe the distinguishing features of the E92 body construction. • Explain the operation of the EWS4 immobilizer system. • Describe the new lighting functions and features found in the E92. • Explain the operation of the seat belt extender on the E92. • Describe the Easy-Entry function. • Identify the changes to the Bus Network. 2 E92 Complete Vehicle Introduction The third generation of the 3 Series Coupes is here, developed on the basis of the E90 and honoring the long line of BMW coupes of the past with its sporty new 2 door body styling. The use of lighter and stronger body components, more powerful engines and enhanced features make this coupe stand out among its competition. 3 E92 Complete Vehicle The 335i will replace the 330i and it gets the new N54 twin turbo, direct injected engine with 300hp and 300ft/lb. The 328i will replace the 325i and will come with a further developed N52 engine with increased horse power to 230hp and torque to 200ft/lb. There is also a N51 SULEV engine that will be available only with automatic transmission. • The front fenders and rocker panel covers are fabricated from Thermo-Plastic mater¬ ial to promote weight distribution • Upgraded brakes on 335i: front disc diameter increased from 13.0 (330i) to 13.7 in. • New lighting features like Bi-Xenon headlamps standard the addition of Welcome lights (a BMW first) that greet the driver as the vehicle is opened. Adaptive head¬ lights with Cornering lights help illuminate around the dark corners as well as Daytime running lights with corona rings promote daytime vehicle visibility. • Vehicle security is enhance with the use of EWS4 immobilizer. • The use of a Seat Belt Extender and the Easy-Entry (rear compartment) function promote occupant comfort. • The Tire Pressure Monitoring System Has been updated to comply with the most recent US regulations. 4 E92 Complete Vehicle Body External dimensions (mm) E92 E46/2 Vehicle length 4580 4448 Overall vehicle width 1782 1757 Vehicle height, unladen 1395 1369 Wheelbase 2760 2725 Overhang front 771 774 Overhang rear 1049 1049 Track width front 1500 1474 Track width rear 1513 1486 Wheels /tires 225/45 R17 205/55 R16 5 E92 Complete Vehicle Index Explanation Index Explanation 1 DX54, DX56 Steel 6 HC600,HD680 Steel 2 HC 180,HX180 Steel 7 Docol 1000,22Mn B5 Steel 3 HC220,HX220 Steel 8 Plastic 4 HC300, HX 300 Steel 9 Other metals materials 5 HC 400 Steel Body Structure A stronger and lighter body is constructed of a combination of different types of materials including many metals of different composition and even Plastic. This increases rigidity and provides more structural support where needed with out scarifying vehicle overall weight. The passive safety principle is based on retaining the passenger cell with dynamic deformation zones. • Carrier structures with a high load bearing capacity • Optimum utilization of deformation ranges • Extremely rigid passenger cell • Effective restraint systems 6 E92 Complete Vehicle Fenders and Rocker Panel Covers Fenders and Rocker Panel Covers Like the 6 Series, Thermo Plastic is used in the construction of the two front fenders and rocker panels covers, to promote weight distribution. This plastic injection method of fabricating parts allows for more freedom of design than ever possi¬ ble with the stamping method. The resulting com¬ ponents are not only lighter they are less expensive to produce. This plastic compound has been enhanced to sup¬ port the refinishing process, in that it doesn’t need to rest before we paint it for it retains its shape bet¬ ter and the mounting holes are slotted to compen¬ sate for possible expansion. Note: The use of these components results in a 20 lb overall reduction of the vehicle body weight, that enhances fuel economy and performance. 7 E92 Complete Vehicle Door Construction Doors The doors are longer than a 6 Series, but lighter than the E46. This was achieved by the use of Tailored Blanks in their construction. With its shell construction the weight of the frameless steel door of the E92 has been reduced by 2.5 kg compared to the predecessor model (E46 Coupe) despite product- specific improvements. • Stiffer hinge design layout minimizes the lowering effect of the door in response to force application. • Holding forces of the door retainer that prevent the door swinging back when opened have been increased in the two arrest positions, i.e. initial and main arrest positions. • The dent rigidity of the outer skin panel has been increased compared to that on the E46 Coupe. • Two side impact carriers in each door reduce intrusion in the event of side impact so that the occupants are protected from serious injuries in the area of the legs, pelvis and torso. The lighter weight of the E92 doors compared to those of the E46 Coupe were achieved primarily by the use of tailor blanks in the inner door panel. (Metal plates of different thick¬ nesses are joined by laser welding to achieve a lighter and stronger component) The high rigidity of the door and the passive safety for the occupants are achieved by 2 side impact carriers, of which the upper carrier has a double groove section and the lower carrier a single groove section to provide higher strength levels. In addition, a crash pad in the E92 (Europe version) reduces the load in the pelvic area in the vent of side impact. Expanded foam on the side impact carriers additionally increases the dent rigidity of the door outer skin panel. 8 E92 Complete Vehicle Car Access System 3 with EWS4 With the launch of the E92, a new electronic vehicle immobilizer. The EWS4 features an ultramodern encryption method with a 124 bit secrete key. Start enable involves a spe¬ cial check procedure. A random number is generated in the DME and sent to the CAS. The CAS calculates the result from the random number and the secrete key and sends it back to the DME. The DME performs the same calculations and therefore already knows the result. Start enable takes place when both results are identical. The car access system 3 with the new generation of electronic vehicle immobilizer EWS4 was introduced in E92 vehicles with the N52/N54 gasoline engine. The vehicle immobilizer consists of the ID transmitter which is identical for the vehicle and therefore to CAS3. CAS3 exchanges data with the DME via the CAS-bus and can¬ cels the vehicle immobilization function. The EWS4 is a new development and uses a new, modern encryption method. A 128 bit long secret key is assigned to each vehicle and stored in the BMW database. This secrete key is known only to BMW. The secrete key is programmed and locked in the CAS and in the DME control unit. Once entered in the control unit, the secrete key can no longer be changed or deleted. This therefore means that each control unit is assigned to a specific vehicle. One control unit in the system sends an encrypted code to another control unit for the purpose of checking the authorization. In turn, this control unit sends back a correspond¬ ing code. Replacement of Control Units The procedure described below must be followed in order to replace a defective control unit (CAS/DME). The reguired control unit is ordered together with the necessary vehicle data (VIN) from the Parts Department. A new "blank" control unit is programmed with the corresponding program data for the vehicle and the secrete key from the BMW database, locked and sent to the dealer. The new control unit is installed in the vehicle and started. Note: No alignment procedure is necessary as in earlier EWS systems. Since the control units are assigned to the specific vehicle, replacement with a unit from another vehicle is not possible. 9 E92 Complete Vehicle System Configuration i)| KLSCL CAS-Bin A.S .Start Kl tSWjp Kt 15 Kl R KI.R KI.30L K-CAN U ^ i^j- -Cp- Index Explanation Index Explanation 1 Car access system with EWS4 5 Junction box 2 Starter 6 Battery 3 Injection relay 7 Start/Stop button 4 Digital motor electronics MSV80/MSV80 8 Holder 10 E92 Complete Vehicle The electronic vehicle immobilizer consists of several components. In the E92 these components are the CAS3 and the DME MSV80/MSD80. The CAS3 contains the software for the EWS4 and, with corresponding identification of the ID transmitter, the enable of terminal R, 15 and 50 for the starter. The enable for the ignition and fuel injection systems is done by the DME. Both control units are connected by the K-CAN, the junction box serving as the gateway and the PT-CAN. Data is also exchanged on the CAS-bus. The data is always transmitted parallel via both bus systems.The signals that arrive first are used. The DME activates the fuel injection relay for the power supply of the fuel injectors. The DME features a direct line to the starter relay in the CAS in order to initiate the start pro¬ cedure and, if necessary, to terminate it, in the event of a PT-CAN fault or a faulty signal, like no engine speed signal. 11 E92 Complete Vehicle EWS4 Immobilizer Start Enable The start procedure is enabled by means of a special request and response procedure known as challenge-response. The DME generates a random number in a random gen¬ erator and sends it as the challenge to the CAS. The CAS and the DME contain the same secrete key and both control units use the same calculation algorithm. The CAS now calculates the result from the received random number, the secrete key and the algorithm. The result is sent as the CAS response to the DME. During this time, the DME now calculates the same random number with the secrete key and the algorithm and already knows the result. The response of the CAS is compared with the result of the DME. Start is enabled if the result is identical. Time-based Query As from terminal R or terminal 15 ON, a query (challenge-response) is performed as long as the engine is not yet running. A fault code is entered in the CAS if no DME response is received approx. 10 seconds after the start of the query or if the response deviates. 12 E92 Complete Vehicle Key Memory Expansion in CAS3 The data memory of the remote key in vehicles equipped with CAS3 is increased from 256 bytes to 512 bytes. The benefit of this key memory expansion for the customer is that more accurate informa¬ tion on the time and scope of the workshop visit can be provided as part of the service acceptance procedure. The following system network information can be read out from the identification trans¬ mitter with the key reader in the service workshop. Data Previous New Remark Mileage reading X Current mileage (km) reading of vehicle Vehicle Identification (VIN) X Key number X Number of identification transmitter Service- relevant CC message X DTC Information (fault code memory) X As from SAM 25, the DTC data is indicated and linked to possible measures in PUMA NAVI-DVD version X Data status of NAVI-DVD Engine oil X Information on topping up or draining the engine oil (overfilling) Battery condition X Change status of the battery in the vehicle Integration stages X l-stage that left the factory, l-stage last programmed and l-stage currently available in the dealership network 13 E92 Complete Vehicle Comfort Access Electric steering column adjustment ELV dropped on US vehicles with manual transmission. Legal Requirements The US regulation (FMVSS114) reguires that vehicles must be eguipped with a key- based locking system that prevents either steering or forward propulsion under the vehi¬ cle's own power or both. This reguirement can be met either by a steering wheel lock ELV or by an electronic vehicle immobilizer EWS. In addition, the regulation also states that on vehicles with automatic transmission and a park position, the ignition key or ID generator can only be removed when the selector lever is locked in the park position (Interlock). Emergency release of the selector lever in the case of an electrical defect, is permitted on vehi¬ cles without ELV only if the emergency release facility is operated with the key. Manual Transmission Vehicles Based on the specified legal reguirements, an electronic vehicle immobilizer EWS is sufficient on manual transmission vehicles and the ELV can be dropped. Automatic Transmission Vehicles The ELV cannot be dropped on automatic transmission vehicles as these vehicles do not feature an emergency release facility for the selector lever with the key. In the case of failure of the vehicle electrical system, the selector lever on automatic transmission vehicles can be released by operating the emergency release facility. The emergency release is accessible after removing the selector lever cover. The selector lever is released by pressing the pawl (1). Emergency Release on Automatic Vehicles 14 E92 Complete Vehicle Exterior Lighting Compared to the E90, several changes have been made in the exterior lighting system of the E92: • The E92 is eguipped with standard bi-xenon headlights. • Adaptive headlights with cornering lights are available as an option. • Standard daytime running light function, realized by the parking light corona rings. Welcome Lights The welcome lights are also a new function. The interior lights are activated for 20 sec. when the vehicle is unlocked but also the parking light corona rings, the tail lights, license plate lights, the door handle area lights and side markers. Note: The welcome lights operate only in automatic and are not activated when the light switch is in the 0 position.This provides the customer with the option of deactivating the system if he/she does not want this function. 15 E92 Complete Vehicle Daytime Running Lights The E92 is equipped with bi-xenon headlights as standard. The daytime running lights function is introduced in connection with the bi-xenon headlights.The daytime running lights serve as an additional safety feature as the vehicle can be better seen. The daytime running lights function is realized by the two corona rings in the headlights and activation of the tail lights and license plate lights. The corona rings light brighter during the day to realize the daytime running lights function.The brightness of the corona rings is reduced to that of the side lights when the low beam head¬ light is switched on by the rain/light sensor or by switch position 2. The corona rings are always switched on at terminal 15 ON. The corona rings are activated pulse width-modulated. The pulse width modulation ensures the daytime running lights and parking light function can be realized with one lamp bulb. Note: In the event of a defective bulb in the tail lights, after removal, the bulb carrier must be fitted in the tail light housing otherwise the function of the new bulb cannot be checked due to the lack of ground connection. 16 E92 Complete Vehicle Light distribution in headlight for daytime running light function The daytime running light uses the same corona rings as the side lights. Both corona rings feature a common H8 bulb. The H8 lamp bulb is activated differently depending on the side light or daytime running light function. The inner ring is illuminated from the rear by reflectors. The outer rings around the headlight are supplied via fiber optic glass rods. The light from the H8 bulb is directed by mirrors into the fiber optic glass rods. Deactivating the daytime running lights function The function can be deactivated if reguired by the customer. On vehicles eguipped with a central information display, the function can be deactivated in the "Light settings" menu.The function is deactivated in the instrument cluster on vehicles with no CID. Cornering Lights Cornering lights will be introduced for the first time with the launch of the E92.They rep¬ resent an expansion of the functions of the adaptive headlights. In addition to the adaptive headlight, the cornering light illuminates the area in front of and to the side the vehicle. The cornering light is integrated in the headlight where the previous high beam lamp was located The light beam is reflected to the side by the special shape of the deflector and the position of the H3 bulb. The cornering light cannot be ordered as a separate option as it is an added function of Adaptive Headlights (SA 524). 17 E92 Complete Vehicle Advantages of the Cornering Light The cornering light makes it possible to recognize people or traffic situations earlier in the turning area. As the following example shows, pedestrians are recognized before the vehicle actually turns . This function represents a considerable increase in safety for the driver and other road users. The special arrangement of the mirror surface in the reflector and the special shape of the lens deflect the light beams to the side while preventing forward dazzle. The angle of the steering wheel to acti¬ vate the cornering light differs depend¬ ing on the type of steering system used (power steering or active steering), steering gear and steering gear ratio. The steering wheel lock to activate the cornering light when the vehicle is stationary is between approximately 40° and 75° depending on the type of steering. Flash to pass does not affect the cor¬ nering light nor does the hazard func¬ tion activate it. The cornering lights illuminate when the steering angle sensor indicates a turn below 40mph. respective turn signal is operated and or the Note: Both cornering lights come on when the reverse gear is selected to help illuminate the way. 18 E92 Complete Vehicle Bi-xenon lamp Index Explanation Index Explanation 1 Bi-xenon lamp 3 H3 bulb for cornering light 2 H8 bulb for side light and Daytime running light 4 Mirror for cornering light 19 E92 Complete Vehicle Headlamp Circuit Diagram v <2) *) © © (*) D i) v ’5 20 E92 Complete Vehicle Index Explanation Index Explanation 1 Left controller with stepper motor 11 Junction Box 2 Side light/daytime running light 12 Ride-height sensor, rear 3 High beam shutter 13 Brake light switch 4 Bi-xenon light bulb, left 14 Footwell module 5 Cornering light left 15 Light switch cluster 6 Cornering light right 16 Steering column switch cluster 7 Bi-xenon light bulb, right 17 Car access system 8 High beam shutter right 18 Electronic transmission control unit 9 Side light/Daytime running light, right 19 Dynamic stability control 10 Right controller with stepper motor 20 Ride-height sensor, front Switch-on conditions for the cornering lights The corresponding cornering lights will illuminate depending on the following criteria: • The selection of the turn signal below 65kph/40mph • Steering angle input while driving below 65kph/40mph • With vehicle stationary and engine running a steering angle of 40° to 70° depending on the steering system • With reverse gear engaged both cornering light will illuminate Switch-off conditions for the cornering light The cornering light switches off in the following conditions: • Adaptive headlight off • Direction indicator off • Directional constantly on above 40kph/25mph • Steering angle is reduced ( by 5°-10° after switch-on condition with vehicle stationary) • Steering angle increased while driving above 70kph/43mph • While drifting (Steering lock and yaw rate in opposite directions) • While turning at a traffic light there is a 4 sec time out • Headlight temperature too high (headlight protection) • Reverse gear disengaged 21 E92 Complete Vehicle Interior and Lighting The interior lights package of the E92 has been expanded by two functions. The E92 has two rear compartment footwell lights that facilitate entry in the rear compartment. The E92 also features ambient linear lighting in the doors and side trim panels. The door and side trim panels are illuminated indi¬ rectly by fiber optic cables from the strip. An LED provides the light source for the fiber optic cables. The fiber optic cable is made of plastic with small notches from which the light emits. The length of the fiber optic cable and the number of notches provide area lighting over the door and side trim panel. The interior differs from that of the E90 and the E46 in that the E92 is a four passenger vehicle. Like the E46 convertible the E92 also incorporates the easy-entry feature that facilitates the entry and exit of the rear of the vehicle by using an electric motor to move the seats forward and back on its rails. The most distinctive feature is the addition of driver and passenger side electric seat belt extenders, making the seat belts more accessible to the occupants due to the larger door and the position of the B-pillar, which makes reaching the seat belt difficult. 22 E92 Complete Vehicle Seat Belt Extender In line with its concept and design, the E92 Coupe features large doors. As a result, the B-pillar with the reversal point for the seat belt is located further towards the rear relative to the seat position. This makes the seat belt difficult to reach for the driver or front pas¬ senger. For this reason, an electrically operated seat belt extender is installed on the E92. The seat belt extender extends and moves the seat belt out of its rest position at the B-pillar by approximately 25 cm in the direction of the driver and front passenger. This makes it considerably easier and more convenient for the driver and front passenger to fasten the seat belt. 23 E92 Complete Vehicle System Function The seat belt extender system essentially consists of the footwell module with the master functionality and the two seat belt extender controllers connected via the LIN-BUS. The footwell module receives the terminal status from the car access system via the K- CAN. The footwell module receives further important information from the airbag control unit via the K-CAN. The information contains the status of the seat belt contacts and of the seat occupancy detection facility on the front passenger seat. The footwell module evaluates this information together with the determined status of the door contacts and decides whether the seat belt extenders are extended or retracted. The footwell module informs the seat belt controllers of this decision via the LIN-bus. The corresponding seat belt controller activates the seat belt extender motor and extends or retracts the toothed rack of the seat belt extender. The seat belt controller evaluates the Hall signals for the speed and end position and informs the footwell module of the position. The functions of the seat belt extender are uniform throughout the world. Only a differ¬ ence is made between the driver and front passenger in terms of functionality. The driver and passenger doors must be closed the key in the ignition or the ignition on for the seat belt extenders to operate. 24 E92 Complete Vehicle System Components The system consists of the following components: • Controller for driver's seat belt extender GBFA • Controller for passenger's seat belt extender GBBF • Driver's seat belt extender - Seat belt extender motor - Hall sensor - End position sensor • Front passenger's seat belt extender - Seat belt extender motor - Hall sensor - End position sensor • Footwell module with sensors and LIN-bus connection • Junction box for power supply • Airbag control unit for sensor information Seat Belt Extender Controller The universal control unit that is also used in other systems is used as the controller for the seat belt extender. The controller for the seat belt extenders is connected via the LIN-bus to the footwell module. This LIN-bus has a data rate of 19.2 Kbit/s. The controllers for the driver/passenger seat belt extenders are identical and differ in terms of their ground coding. The control unit is connected by means of three plugs. Plug connector (1) is used for the power supply and ground coding. This plug connector also features the LIN-bus connec¬ tion. Plug connector (2) connects the end position sensor. Plug connector (3) connects the motor and the speed Hall sensor. (See graphic on the following page.) 25 E92 Complete Vehicle Seat Belt Extender Controller Index Explanation 1 Plug connection to vehicle system network 2 Plug connection to end position switch 3 Plug connection to drive unit The controller is located behind the side trim panel along with the seat belt extender. The controller is constantly monitoring the extension and retraction of the seat belt extender and it’s designed to shut down in the event of overvoltage (16V) or under voltage (9V) condition. Seat Belt Extender The driver/passenger seat belt extenders are identical in terms of design but is supplied as a left-hand and right-hand variant for mounting purposes. The seat belt extender consists of the following components: • Seat belt extender motor with gear unit • Hall sensor, motor • End position sensor • Toothed rack • Belt guide • Chrome cover 26 E92 Complete Vehicle Index Explanation Index Explanation 1 End position sensor 4 Toothed rack 2 Electric motor 5 Seat belt guide with chrome cover 3 Magnet for end position sensor Seat Belt Extender Motor The seat belt extender motor is a DC motor. The motor is connected to the toothed rack by means of a step-down gear mechanism. A Hall sensor, mounted on the seat belt extender motor measures motor’s speed. A Hall signal is generated for each revolution of the motor. Based on the number of Hall signals, the control unit always knows the exact position of the seat belt extender. The Hall pulses are added as the seat belt extender extends and the motor is switched off on reaching the maximum number of pulses. This represents the "extended" end position. When the seat belt extender is retracted, power is applied to the motor until the magnet in the toothed rack reaches the end position sensor. The system is initialized by reaching the end position. Initialization is performed every time the seat belt is retracted. Note: Only the chrome cover or the complete seat belt extender can be replaced for repair purposes. 27 E92 Complete Vehicle Blocking Detection If, during extension, the Hall signals are not received for 250ms, this situation is interpret¬ ed as blocking of the extender and the motor is switched off. The seat belt extender motor is reversed and the toothed rack retracted. The motor is driven for 1 second if the toothed rack is blocked. This procedure is repeat¬ ed up to three times. The motor is then no longer activated. A renewed attempt to drive the motor is made only on reactivation of the system (door contact and terminal R). The system must be checked by a BMW dealer workshop if the system is actually blocked mechanically. Extender Operating Criteria Extend Conditions Driver’s Extender Passenger’s Extender Terminal R* x x Terminal 15* x x Seat belt contact open x x Door contact detects closed state x x Seat occupancy** x ID transmitter in the vehicle with comfort access x x * Depending on when the door was closed. ** The passenger seat belt extender extends at terminal R after 10 seconds regardless of whether the seat is occupied or not. Retract Conditions Driver’s Extender Passenger’s Extender Seat belt contact closed X X Door contact detects opened state X X Driving speeds above 7kph X X Seat belt extender extended longer that 60 sec. X X Seat detected as not occupied X 30 sec. after switching from terminal R X X Mechanical blocking X X 28 E92 Complete Vehicle 29 E92 Complete Vehicle System Schematic Circuit Diagram 30 E92 Complete Vehicle Index Explanation Index Explanation 1 Footwell module 8 Passenger seat belt contact 2 Car access system 9 Seat occupancy detection system 3 Junction box electronics 10 Airbag control unit D Power distribution box, junction box 11 Driver seat belt contact 5 Door contact, passenger’s side 12 Controller for driver seat belt extender 6 Seat belt extender motor with Hall switch for speed and end position, passenger’s side. 13 Seat belt extender motor with Hall switch for speed and end position, driver’s side. D Controller for passenger seat belt extender 14 Door contact, driver’s side Diagnosis Diagnosis of the controller for the seat belt extender or of the seat belt extender itself takes place through the footwell module. If there is a fault, e.g. a defective Hall sensor, the controller of the seat belt extender sends this status via the LIN-bus to the footwell mod¬ ule. The footwell module stores the fault code and communicates with the diagnosis tool. Coding After replacing the controller for the seat belt extender it must be encoded by the footwell module via the LIN-bus. It is not possible to address the LIN-bus control units direct. 31 E92 Complete Vehicle Easy-Entry Function The electrically adjustable seats (comfort and sport) installed in the E92 are equipped with a rear compartment easy-entry function to facilitate entry in the rear compartment. For this purpose, an adjustment switch is provided on the upper end of the backrest in order to move the seat forward and backward at double the speed of the regular seat for¬ ward/ backward adjustment function. By mechanically releasing the seat backrest, it can be additionally tilted forward to create sufficient space for convenient entry. When entering the rear compartment, the customer can move the seat forward with the adjustment switch. By mechanically releasing the seat backrest, it can be additionally tilt¬ ed forward to create sufficient space for convenient entry. After entering the vehicle, the seat backrest is tilted back and the seat can be moved back using the adjustment switch. The seat moves back and assumes the previous position. The previous position is determined by means of a Hall sensor on the seat forward/backward adjustment motor. The signals are read into the driver/passenger seat module and correspondingly evaluated. For this reason, a front passenger seat module is installed on vehicles equipped with electrically adjustable seats. The front passenger seat module has no memory function. 32 E92 Complete Vehicle Easy-Entry Function Front Seats The seat mechanism is designed such as to allow the customer to fold the backrest for¬ ward and push the seat in forward direction when accessing the rear seat. The backrest then remains locked in the frontmost position. When the seat is pushed back, it returns exactly to its original position and releases the backrest in this position. The electrically adjustable seat is moved forward by means of a switch located above the grip handle for moving the backrest forward. The seat moves at double the normal speed of the seat for¬ ward/backward adjustment. 33 E92 Complete Vehicle Driver’s Seat Easy-Entry System Schematic 34 33 31 ,_ s' 30 34 E92 Complete Vehicle Index Explanation Index Explanation 1 Integrated automatic climate control 19 Seat tilt position 2 Center console switch cluster 20 Motor for seat backrest angle adjustment 3 Junction box electronics 21 Backrest tilt position n Power distribution box, junction box 22 2-stage motor for seat forward/backward adjustment 5 Outside mirror heater, passenger’s side 23 Position, seat forward/backward adjustment 6 Mirror folding motor, passenger’s side 24 Rear compartment easy-entry switch D Potentiometer for outside mirror position memory, passenger’s side 25 Seat adjustment switch with memory buttons 8 Electrochromatic outside mirror 26 Lumbar support button 9 Outside mirror Adjustment motors 27 Motor for lumbar support and back rest width adjustment 10 Pressure valves for backrest width adjustment 28 Backrest width adjustment button 11 Pressure control valves for lumbar support adjustment 29 Footwell module 12 Backrest heating 30 Outside mirror adjustment motors 13 Seat cushion heating 31 Electronchromatic outside mirrors 14 Driver’s seat module 32 Potentiometer for outside mirror position memory, driver’s side 15 Seat heating temperature sensor 33 Mirror folding motor, driver’s side 16 Motor for seat height adjustment 34 outside mirror heating, driver’s side 17 Position, seat height adjustment 35 Driver’s switch cluster 18 Motor for seat angle adjustment 35 E92 Complete Vehicle Passenger’s Seat Easy-Entry System Schematic 36 E92 Complete Vehicle Index Explanation Index Explanation 1 Integrated automatic climate control 11 Backrest heating 2 Center console switch cluster 12 Seat heating temperature sensor 3 Junction box electronics 13 Motor for seat height adjustment Power distribution box, junction box 14 Motor for seat angle adjustment 5 Backrest width adjustment button 15 Motor for seat backrest angle adjustment 6 Lumbar support button 16 2-stage motor for seat forward/backward adjustment 7 Switch for seat settings 17 Position, seat forward/backward adjustment 8 Rear compartment easy-entry switch 18 Pressure control valves for lumbar support adjustment 9 Passenger’s seat module 19 Motor for lumbar support and backrest width adjustment 10 Seat cushion heating 20 Pressure valves for backrest width adjustment 37 E92 Complete Vehicle 38 E92 Complete Vehicle Changes to the BUS Network With the adoption of the vehicle systems network from the E90 with the junction box as the gateway and the footwell module as a further control unit with many functions, the system overviews of the vehicle systems network are, to a large extent identical. The E90/E92 vehicle systems networks differ only slightly by the addition of new control units. The following changes have been made in the various bus systems: Changes in PT-CAN The transfer case control unit is installed in vehicles eguipped with the xDrive all-wheel drive system option. The DSC is replaced by the DXC. The DXC performs the functions of the DSC and has been expanded to include additional all-wheel drive functions. Changes in MOST IBOC In-Band On-Channel, a terrestrial digital radio, has been newly added. Changes in K-CAN Further exterior lighting functions have been implemented in the footwell module. These functions include : • Daytime driving lights • Welcome light • Cornering light on vehicles with active headlight The tire pressure monitoring system TPMS replaces the tire failure indicator RPA to con¬ form to US legal reguirements. The EWS 4 has been implemented in the CAS 3 on petrol engine vehicles. A 4-channel PDC for the rear is offered in the E92. There is no PDC button in the center console. A new addition is the front passenger seat module SMBF for evaluating the Hall sensor of the seat forward/backward adjustment facility on vehicles with electrically adjustable seats for the rear compartment easy entry function. Changes in LIN-bus New features in the LIN-bus include the two control units for the driver and front passen¬ ger seat belt extender. Note: There are no changes in the F-CAN system nor the Bit-serial Data interface (BSD). 39 E92 Complete Vehicle E92 Bus System Overview 40 E92 Complete Vehicle Index Explanation Index Explanation ACC Active cruise control JB Junction box AL Active steering system KOMBI Instrument cluster ASP Outside mirror LDM Longitudinal dynamic management CA Comfort access LWS Steering angle sensor CAS Car access system M-ASK Multi-audio system controller CCC Car communication computer MRS Multiple restraint system CDC CD changer OC3 Seat occupancy detection mat CID Central information display PDC Park distance control CON Controller QLT Quality,level,temp,oil sensor DME Digital motor electronics RAD Radio 1, radio 2 DSC Dynamic stability control RLS Rain/driving light sensor DSC- Sen DSC Sensor SBFA Driver’s door switch cluster DWA Anti-theft alarm system SDARS Satellite tuner DXC Dynamic traction control SINE Emergency current siren w/ tilt alarm sensor EGS Electronic transmission control unit SMBF Passenger’s seat module EKP Electric fuel pump control unit SMC Stepper motor controller ELV Electric steering lock SMFA Driver’s seat module EWP Electric water pump TONS Temperature, oil level sensor FRM Footwell module Top-HiFi Top-HiFi Amplifier FS Most direct access TPMS Tire pressure Monitoring System FZD Roof function center TPM-sen TPMS Sensors X4 GBBF Passenger’s seat belt extender module ULF Universal charging and hands-free facility GBFA Driver’s seat belt extender module USIS Ultrasonic passenger compartment protection IBOC In band on channel (digital radio) VGSG Transfer box control unit IBS Intelligent battery sensor ZH Electric auxiliary heater based on PTC principle IHKA Automatic climate control SZL Steering column switch cluster TCU Telematics control unit TAGE Electric outer door handle module 41 E92 Complete Vehicle