check engine 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 01-2
 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 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 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 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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AUDI A4 1999 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual 01-9
      
For the function: 
     
02:   Check DTC 
Memory  - Let engine idle, or, crank 
engine with starter for at 
least 5 seconds without 
switching ignition off 
03:   Output 
Diagnostic 
Test

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AUDI A4 1999 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual an automatic test sequence is carried out (checks DTC memory of all 
systems with rapid data transfer). 
-  Press buttons -0- and -1- to insert the "Engine Electronics" address 
word 01. 
Pa
ge 15 of

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AUDI A4 1999 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual 01-10
 
Rapid data transfer 
Q
01 - Engine Electronics
    
Indicated on display  
-  Press -Q- button to confirm input.
Rapid data transfer Scan Tool sends address word 01
    
Indicated on display

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AUDI A4 1999 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual 01-11
 
Rapid data transfer 
HELP
K wire not switching to Ground
    
If one of the following two problems is shown on the display  
Rapid data transfer HELPK wire not switching to B+
    
Note:  
Che

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AUDI A4 1999 B5 / 1.G AFC Engine On Board Diagnostic Multiport Fuel Injection Workshop Manual 01-15
 
Rapid data transfer DTC Memor
y is erased
    
Indicated on display  
- 
Press  button.
Rapid data transfer 
HELP
Select function XX
    
Indicated on display  
Note:  
After address word 00 i
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