check engine AUDI A4 1999 B5 / 1.G AWM Engine Secondary Air System Workshop Manual

AUDI A4 1999 B5 / 1.G AWM Engine Secondary Air System Workshop Manual A4 1999 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/942/w960_942-0.png AUDI A4 1999 B5 / 1.G AWM Engine Secondary Air System Workshop Manual

Page 11 of 26

AUDI A4 1999 B5 / 1.G AWM Engine Secondary Air System Workshop Manual 26-51
      
Checking power supply  
     
Note:  
     The power supply for the secondary air injection 
solenoid valve -N112- is via the fuel pump relay. 
     
Test requirements:  
     
Fuse for s

Page 14 of 26

AUDI A4 1999 B5 / 1.G AWM Engine Secondary Air System Workshop Manual 26-53
       If the LED lamp does not flash or if it lights up 
continuously:  
     
-  Connect VAG 1598/31 test box to wiring 
harness leading to engine control module; 
engine control module should

Page 17 of 26

AUDI A4 1999 B5 / 1.G AWM Engine Secondary Air System Workshop Manual 26-56
      
Check voltage supply of secondary air 
injection pump relay  
     
-  Switch ignition off.
     
-  Remove secondary air injection pump relay.
    
If specified value is not attained:  -

Page 18 of 26

AUDI A4 1999 B5 / 1.G AWM Engine Secondary Air System Workshop Manual 26-57
      
  -  Check for open circuit in wiring from battery + 
(terminal 30) to fuse S130 for secondary air 
injection pump relay (in 3-position in E-box of 
plenum chamber, position 2).

Page 19 of 26

AUDI A4 1999 B5 / 1.G AWM Engine Secondary Air System Workshop Manual 26-58
      
  -  Check for open circuit in wiring from 
secondary air injection pump relay (in 3-
position relay carrier in E-box of plenum 
chamber) via fuse S234 (in fuse box, position 
34) to fuel

Page 20 of 26

AUDI A4 1999 B5 / 1.G AWM Engine Secondary Air System Workshop Manual 26-59
       If LED does not flash:  
     
-  Switch ignition off.
     
-  Connect VAG 1598/31 test box to wiring 
harness leading to engine control module; 
engine control module should not be conn

Page 21 of 26

AUDI A4 1999 B5 / 1.G AWM Engine Secondary Air System Workshop Manual 26-60
      
Check voltage supply for secondary air 
injection pump motor  
    
-  Remove sound insulation -arrows-.
    
-  Disconnect connector from Secondary Air Injection (AIR) Pump motor -
V101-

Page 23 of 26

AUDI A4 1999 B5 / 1.G AWM Engine Secondary Air System Workshop Manual 26-62
      
Combination valve for secondary air 
inlet, checking function and for leaks
 
     
Special tools and equipment  
    
Test requirements:  
Test sequence  
Vacuum hand pump VAG 1390Vacuum