AUDI A4 1999 B5 / 1.G AEB Engine Motronic MFI And Ignition System

AUDI A4 1999 B5 / 1.G AEB Engine Motronic MFI And Ignition System A4 1999 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/999/w960_999-0.png AUDI A4 1999 B5 / 1.G AEB Engine Motronic MFI And Ignition System
Trending: heating, buttons, gas type, display, oil change, change time, fuse

Page 1 of 135

AUDI A4 1999 B5 / 1.G AEB Engine Motronic MFI And Ignition System 24-1
 
  
Motronic Multiport Fuel 
Injection (MFI) and ignition 
system Component locations, overview
 
---- 
Data Link Connector (DLC)
Located under knee bar, left side of 
steering wheel 
---- 
Fuel

Page 2 of 135

AUDI A4 1999 B5 / 1.G AEB Engine Motronic MFI And Ignition System 24-2
 
  
1 - 
Heated Oxygen Sensor (HO2S) -G39- with 
Oxygen Sensor (O2S) heater -Z19- 
2 - 
Engine Coolant Temperature (ECT) sensor 
-G62- 
4-pin connector
3 - 
Harness connector for: Heated Oxygen

Page 3 of 135

AUDI A4 1999 B5 / 1.G AEB Engine Motronic MFI And Ignition System 24-3
 
  
5 - 
EVAP canister purge regulator valve -N80-
6 - 
Power output stage -N122- 
5-pin connector: signal wiring from ECM4-pin connector: coil primary circuit 
connections 
7 - 
Mass Air Flow (

Page 4 of 135

AUDI A4 1999 B5 / 1.G AEB Engine Motronic MFI And Ignition System 24-4
 
  
11 - 
Camshaft Position (CMP) sensor -G40- 
12 - 
Knock Sensor (KS) 1 -G61- 
13 - 
Knock Sensor (KS) 2 -G66- 
14 - 
Engine speed (RPM) sensor -G28- 
  (behind oil filter housing on engine cy

Page 5 of 135

AUDI A4 1999 B5 / 1.G AEB Engine Motronic MFI And Ignition System 24-5
      
Safety precautions
 
     
WARNING! 
     
Fire hazard! Do not smoke, work near heaters 
or open flame, or have anything nearby that 
could ignite fuel. The fuel system is under 
pressure.

Page 6 of 135

AUDI A4 1999 B5 / 1.G AEB Engine Motronic MFI And Ignition System      
BEFORE cranking engine at starting RPM 
(e.g. for compression testing) disable ignition 
and fuel injection systems: 
     
Disconnect both ignition coil power output 
stages, and both Motronic

Page 7 of 135

AUDI A4 1999 B5 / 1.G AEB Engine Motronic MFI And Ignition System 24-6
      
CAUTION! 
     
BEFORE disconnecting the battery: 
     
Stop the engine.
     Be sure the ignition is switched OFF (also 
applies when connecting the battery). Failure 
to do so may damag

Page 8 of 135

AUDI A4 1999 B5 / 1.G AEB Engine Motronic MFI And Ignition System connector test kit. 
     
For any work affecting the Engine Control 
Module (ECM): 
     BEFORE disconnecting the ECM harness 
connector, switch the ignition OFF and WAIT 
at least 20 seconds. Failur

Page 9 of 135

AUDI A4 1999 B5 / 1.G AEB Engine Motronic MFI And Ignition System 24-7
      
Rules of cleanliness
 
     
CAUTION! 
     
Whenever carrying out work on the fuel 
supply and fuel injection systems, carefully 
observe the following five rules of 
cleanliness.

Page 10 of 135

AUDI A4 1999 B5 / 1.G AEB Engine Motronic MFI And Ignition System      
Avoid working with compressed air whenever 
possible. 
     Avoid moving the vehicle if possible.
Pa
ge 10 of 135 Motronic Multi
port Fuel In
jection 
(MFI
) and i
gnition s
ystem
11/19/2002 htt
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