AUDI A4 1999 B5 / 1.G APB Engine Secondary Air System User Guide

AUDI A4 1999 B5 / 1.G APB Engine Secondary Air System User Guide A4 1999 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/967/w960_967-0.png AUDI A4 1999 B5 / 1.G APB Engine Secondary Air System User Guide

Page 11 of 29

AUDI A4 1999 B5 / 1.G APB Engine Secondary Air System User Guide 26-41
      
Checking voltage supply  
     
-  Disconnect connector from Secondary Air 
Injection (AIR) solenoid valve -N112-. 
    
If LED does not light:  -  Connect VAG 1527B voltage tester as fol

Page 12 of 29

AUDI A4 1999 B5 / 1.G APB Engine Secondary Air System User Guide 26-42
 
    
 Electrical Wiring Diagrams, Troubleshooting & Component Locations   
 Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel Injection & Ignition, 
Engine Code(s): APB, Repair Group 24
   
Checking

Page 13 of 29

AUDI A4 1999 B5 / 1.G APB Engine Secondary Air System User Guide 26-43
      
-  Initiate output Diagnostic Test Mode (DTM) and 
activate Secondary Air Injection (AIR) solenoid 
valve -N112 
     
       Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel 
Injection & Igni

Page 14 of 29

AUDI A4 1999 B5 / 1.G APB Engine Secondary Air System User Guide 26-44
       If wire connection is OK:  
     
-  Replace Engine Control Module (ECM).
     
       Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel 
Injection & Ignition, Engine Code(s): APB, Repair Group

Page 15 of 29

AUDI A4 1999 B5 / 1.G APB Engine Secondary Air System User Guide 26-45
 
  
Secondary Air Injection (AIR) pump relay -
J299- and activation, checking
 
Special tools and equipment  
 
VAG 1526A
 VAG 1527B
 VAG 1594A
 VAG 1598/31
Pa
ge 15 of 29 Secondar
y air s
yste

Page 16 of 29

AUDI A4 1999 B5 / 1.G APB Engine Secondary Air System User Guide 26-46
       Installation location   Installation locations-
Overview.       
       Repair Manual, 2.7 Liter V6 5V BiTurbo Fuel 
Injection & Ignition, Engine Code(s): APB, Repair Group 24
   
     
T

Page 17 of 29

AUDI A4 1999 B5 / 1.G APB Engine Secondary Air System User Guide B - If relay triggers, but Secondary Air Injection (AIR) pump does not run:  26
-49
 . 
-  Check voltage supply of Secondary Air Injection (AIR) pump motor   
Page 26
-51
 . 
Pa
ge 17 of 29 Secondar
y

Page 18 of 29

AUDI A4 1999 B5 / 1.G APB Engine Secondary Air System User Guide 26-47
      
Checking voltage supply of Secondary Air 
Injection (AIR) pump relay  
     
-  Switch ignition off.
     
-  Remove Secondary Air Injection (AIR) pump 
relay 
     
-  Connect multimeter

Page 19 of 29

AUDI A4 1999 B5 / 1.G APB Engine Secondary Air System User Guide  Electrical Wiring Diagrams, Troubleshooting & Component Locations   Check wire connection from battery + (terminal 30) to Secondary Air 
Injection (AIR) pump relay -J299- (in 3-socket relay carrier i

Page 20 of 29

AUDI A4 1999 B5 / 1.G APB Engine Secondary Air System User Guide 26-48
      
-  Connect multimeter for voltage measurement as 
follows: 
     
3-socket relay carrier in E-box, 
plenum chamber, position 2  
terminal  
Measure to  
  
4   Engine 
Ground 
(GND)
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