4%20M5-2-1, BMW educational info, Dokumentacja

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//-->Table of ContentsSubjectM5.2.1. . . . . . . . . . . . . . .Objectives of the ModulePurpose of the System . .System Components . . .........................................................................Page. . . . . . . . . . . . . . . . . . .2. . . . . . . . . . . . . . . . . . .2. . . . . . . . . . . . . . . . . . .3. . . . . . . . . . . . . . . . . . .5Ignition Coil Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8Shrouded Fuel Injector Air Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Battery Charge Logic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Evaporative System Pressure Leak Diagnosis. . . . . . . . . . . . . . . . . . . . .12On-board Refueling Vapor Recovery.. . . . . . . . . . . . . . . . . . . . . . . . . . . 18EWS III (3.3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19CAN Bus.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22M5.2.1 for 1999 MY M73TU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24Auxiliary Fan Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27Secondary Air Injection System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28Electrically Heated Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30Exhaust System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28Electric Catalytic Converter Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . .33Review Questions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38M5.2.1Models: E38 with M73/M73TU EngineE38/E39 with M62 EngineProduction Date: E38 with M62 Engine 5/97 Through 98 MYE39 with M62 Engine 9/97 Through 98 MYE38 with M73 Engine 5/97 Through 98 MYE38 with M73TU Engine 99 MY to PresentManufacturer: BoschPin Connector: 134 Pins - 5 Modular Connectors (2 ECMs on M73)Objectives of the ModuleAfter completing this module, you will be able to:• Explain How the Power is Supplied to the Ignition Coils• Describe the Air Shrouded Injector Control on the M73• Understand Why the Idle Speed is Influenced by Battery Charge Logic• Explain the Electrically Heated Thermostat Operation• Understand the Elecrtic Catalytic Converter Function• Describe What “ISN” Means• Name the Location of Evaporative Components• List the Differences of the 99MY M73TU2ST055 M5.2.1M5.2.1 (1998 MY M73 & M62 equipped vehicles)Purpose of the SystemThe M5.2.1 engine control system is manufac-tured by Bosch to BMW specifications. In addi-tion to quality improvement modifications,emphasis was placed on enhancing functionsfor OBD II and Tier 1 compliance.M5.2.1 control modules utilize theSKE(standard shell constructionhousing). The SKE utilizes a modu-lar connector configuration. Thereare a total of 5 connectors provid-ing a combined total of134 pins.21(9 pins) (24 pins)3(52 pins)4(40 pins)5(9 pins)COLOR CODED BY BANKThe modular harness connectors are colorcoded by cylinder bank on the M73. Whenremoving control modules from the E-Box, notethe color of the plugs and mark each module toprevent incorrect replacement. This step isimportant to prevent EWS III (3.3) ISN incom-patibility.The correct Universal Adapter for the M5.2.1application should be used (#90 88 6 121 300).This will ensure the pin connectors and the har-ness will not be damaged.3ST055 M5.2.1FEATURES OF M5.2.1The M5.2.1 system has the following functions or capabilities:••Separate power supply relay for ignition coils.Leak Diagnosis Pump control and feedback monitoring for evaporative system leaktesting. Integration of this system also brought forth modifications to the total fuel evap-orative system providing ORVR (On-board Refueling Vapor Recovery) compliancy.Shrouded Fuel Injector Air control(M73 Engine Only).Battery charge logic (idle speed varied with the battery state of charge).CAN communications with the instrument cluster.“Rolling Code” ISN interface with EWS III (3.3).Knock Sensors are more sensitive in determining ignition knock.Pulse width modulated IHKA Status Signal (S-KO).Running Loss 3/2 Fuel Rail Valve•••••••4ST055 M5.2.1System Components: Inputs - Processing - Outputs5ST055 M5.2.1 [ Pobierz całość w formacie PDF ]

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