AUDI A4 1999 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual

AUDI A4 1999 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual A4 1999 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/1034/w960_1034-0.png AUDI A4 1999 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual

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AUDI A4 1999 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual 01-1
 On Board Diagnostic (OBD) - Multiport Fuel Injection (MFI) Engine Control Module (ECM) versions - overview
 
Engine control modules:   4A0 906 266 A  
4A0 906 266 AA  
4A0 906 266 AB  
These are

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AUDI A4 1999 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual - Additional Heated Oxygen Sensor (HO2S) probe after Three Way Catalytic Converter (TWC)
- New engine control module with five individual connectors, total of 96 terminals
- New On Board Diagnostic (O

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AUDI A4 1999 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual 01-2
 On Board Diagnostic (OBD) II technical data
 
Memory  
 
Permanent memory (If the engine control module is disconnected from the permanent battery positive voltage (B+) supply, 
the Diagnostic T

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AUDI A4 1999 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual Function 
04:  Basic Setting   Let engine idle   
Function 
07:  Code Control Module   Switch ignition on  
Function 
08:  Read Measuring Value 
Block  Switch ignition on or let engine idle, or drivin

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AUDI A4 1999 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual 01-3
 Modes under address word 33:  
Mode 1:   Transfer diagnosis data   Switch ignition on or let engine idle   
Mode 2:   Transfer operating conditions   Switch ignition on or let engine idle   
Mod

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AUDI A4 1999 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual  Mode 6 is used to read all test results from components and systems that are NOT continuously monitored.
 Mode 7 is used to read test results of components and systems that are continuously monitored

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AUDI A4 1999 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual 01-4
      
Malfunction Indicator Lamp (MIL), 
functions
 
    
Functional testing:  
The Malfunction Indicator Lamp (MIL) must light up every time the 
ignition is switched on and go out after the en

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AUDI A4 1999 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual 01-5
 Malfunction recognition and repair
 
Notes:  
 
Before initiating the On Board Diagnostic (OBD) program, and before testing wiring and replacing components, check the 
following ground connectio

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AUDI A4 1999 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual only switch the MIL on after two successive trips with prior cold start and malfunction occurring. This process repeats 
continuously. If the malfunction does not occur again within the next 40 engine

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AUDI A4 1999 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual 01-6
 
 The MFI control module differentiates among approx. 150 different malfunctions after evaluating the information, and 
stores them until the DTC memory is erased   Diagnostic Trouble Code (DTC)
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