宝马E90被动安全系统学员培训手册（英文）.pdf

Participant' s Manual Passive Safety System E90BMW ServiceThe information contained in this Participant' s Manual is intended solely for the participants of this seminar run by BMW Aftersales Training.Refer to the latest relevant “BMW Service“ information for any changes/supplements to the Technical Data.Information status: October 2004conceptinfo@bmw.de© 2004 BMW AG Aftersales Training, München, Germany. Reprints of this manual or its parts require the written approval of BMW AG, München.Participant' s Manual Multiple restraint system 5New MRS 5 control unit and sensor systemNew side airbag integrated in seatHead protection system with curtain airbagNew seat belt pretensioner at rearInformation on this Participant' s ManualSymbols usedThe following symbols are used in this Participant' s Manual to facilitate better comprehension and to draw attention to important information.3 contains information for better understanding of the described systems and their functions.1 identifies the end of an item of information.Current content of Participant's ManualInviewoftheconstantfurtherdevelopmentsinthedesignandequipment of BMW vehicles deviations may arise between this Participant' s Manual and the vehicles made available as part of the training course.The background material refers exclusively to left-hand drive vehicles. The controls are in part arranged differently in right-hand drive vehicles than shown on the graphics in the Participant' s Manual.Additional information sourcesYou will find further information on the individual vehicle topic in the BMW diagnosis and repair systems as well as on the Internet under .Contents Multiplerestraintsystem 5Objectives1Introduction3 Development of multiple restraint systems3System overview5 System schematics EU5Functions7 MRS 5 control unit7 Seat belt reminder function (EU)10 System components13 MRS 5 control unit13 Sensors and switches14 Actuators17 Service information23 Safety information23Summary25 Interesting facts about the system2513Objectives Multiple restraint system 5Reference material for practical applications to accompany you throughout the training courseThis Participant' s Manual is compiled to provide you with essential information relating to the fundamental function and new features ofthepassivesafetysystemonthenewBMW 3 Series E90.The manual is designed to accompany the user throughout the training course and complements the seminar material defined by BMW Aftersales Training.In preparation for the technical training and in connection with the practical exercises as part of the training course, this manual will enablethe participant to perform service work in the area of the passive safety system on the new BMW 3 Series.Previous technical and practical knowledge of the passive safety systems in the BMW 1 Series E87, BMW 5 Series E60 or BMW 7 Series E65 will facilitate better understanding of the systems presented here and their functions.Alternatively, the necessary basic knowledge can also be gained by participating in the foundationseminarAirbag-restraintsystems.Pleasedonotforgettoworkthrough the Training and Information Program (SIP) on this topic. Basic knowledge ensures competence in theory and practical applications.2334Introduction Multiple restraint system 5Development of multiple restraint systemsThe Multiple Restraint System MRS 5 is a consistent further-development of the MRS systems in BMW vehicles.This development began in 1996 with the MRS 1 in the E38/E39. The MRS 2 was implementedwiththeintroductionofthehead airbag in the E38 in 1998. MRS 1 and MRS 2 had only one diagnosis bus connection.With the introduction of the MRS 3 in 1999, the safety system was integrated in the K-bus network. MRS 4 was introduced in 2001.The MRS4 RD for the E83 is the last system with K-bus connection.The MRS 5 was used for the first time in 2004 on the BMW 1 Series. The new vehicle circuit structures with K-CAN connection were implemented with the introduction of the BMW 1 Series. The sensor concept of the MRS4 RD is adopted for the MRS 5.MRS 5 control unitThe task of the MRS 5 control unit is to detect accident situations critical for the vehicle occupants and to activate the necessary restraintsystemsselectivelycorrespondingto the crash severity.With the introduction of the new wiring harness concept, the control unit has been expanded from one to two connectors. The firstconnectorlinksthecockpitwiringharness while the second connector is for the vehicle wiring harness.The MRS 5 control unit performs internal diagnosis and monitors all inputs and outputs. Any faults that may occur are stored non- volatile in the control unit and indicated to thedriver by way of the airbag warning lamp (AWL) in the instrument cluster.Communication with other control units in the vehicle system network takes place via the K- CAN. In the event of a crash, a K-bus protocol is transmitted (provided SA 638/639 telephone is installed) via a separate data line to the telema。