schemat działania MS42 MS43.pdf

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Table of Contents
MS42/MS43
Subject
Page
MS42/MS43
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Objectives of the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Purpose of the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Power Supply
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Principle of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Workshop Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Tools and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Air Management
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Principle of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Workshop Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Tools and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Fuel Management
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Principle of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Workshop Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Tools and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Ignition Management
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Principle of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62
Workshop Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
Tools and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72
Emissions Management
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
Evaporative Emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
Exhaust Emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
Principle of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
Workshop Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104
Tools and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107
Performance Controls
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109
ECM Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117
Tools and Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .118
Review Questions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .119
Initial Print Date: 02/01
Revision Date: 09/04
MS42/MS43
Models: E46/E39/Z3 - MS42 with M52TU Engine
E46/E39/Z3/E53 - MS43 with M54 Engine
E46 AWD - MS43 with M54 Engine
Production Date: MS42 MY 1998 - 2000
MS43 MY 2001 - 2002
Manufacturer: Siemens
Pin Connector: 134 Pins - 5 Modular Connectors
After completion of this module you will be able to:
• Describe the Power Supply for the Fuel Injectors and Ignition Coils
• Understand the MDK/EDK and Idle Air Actuator Operation
• Name the Differences Between the MS42/MS43 Fuel Supply System
• List the Inputs Required for Fuel Injector Operation
• Describe Emission Optimized Function
• Name the Two Types of Emissions the ECM Controls
• Explain Why Two Sensors are Used to Monitor Accelerator Pedal Movement
• Understand LDP and DM TL Evaporative Leak Testing
• Describe How the Ignition System is Monitored
2
ST055 MS42/MS43
MS42/MS43
Purpose of the System
The MS42/MS43 systems manage the following functions:
Air:
• Idle Speed Valve
• Electronic Throttle
• Hot Film Air Mass Meter
• Resonance-Turbulence
Intake Control
Fuel:
• Fuel Supply
• Running Losses/Non Return
• Fuel Injection
Ignition:
• Direct Ignition/Optimized
• Knock Control
• Primary/Secondary Ignition
Monitoring
MS42/MS43
DME
Emissions:
• OBD II Compliant
• Secondary Air Injection
• Pre and Post Oxygen Sensors
• Oxygen Sensor Heating
• MAP Thermostat
• Misfire Detection
• Evaporative Emission Control and Leak
Detection
• Malfunction Indicator Light/Service
ENGINE SOON
Performance Controls:
• Dual VANOS Control
• Output of Injection Signal (Ti) for MPG Gage
• Output of Engine RPM (TD) for Tachometer
• A/C Compressor Control
• Electric Cooling Fan
• CAN Bus Communication
• ASC/DSC Interfacing
• EWS 3.3
• Cruise Control
• ECM Programming
3
ST055 MS42/MS43
System Components
MS42/MS43 Engine Control Module :
The Engine Control Module (ECM) features
a single printed circuit board with two 32-bit microprocessors.
The task of the first processor is to control:
• Engine Load
• Electronic Throttle
• Idle Actuator
• Ignition
• Knock Control
The task of the second processor is to control:
• Air / Fuel Mixture
• Emission Control
• Misfire Detection
• Evaporative Leak Detection
12550000.tiff
X60001
9 - Pin
X60002
24-Pin
X60003
52 - Pin
X60004
40 - Pin
X60005
9 - Pin
The 134 pin ECM is manufactured by Siemens to BMW specifications. The ECM is the
SKE (standard shell construction) housing and uses 5 modular connectors. For testing, use
the Universal Adapter Set (break-out box) Special Tool # 90 88 6 121 300.
4
ST055 MS42/MS43
System Components: Inputs - Processing - Outputs
ELECTRONIC
THROTTLE
WARNING LIGHT
EML
MDK
MDK
Malfunction Indicator
Light
GT1
DISplus
5
ST055 MS42/MS43

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