AUDI A4 1998 B5 / 1.G AWM Engine Secondary Air System User Guide

AUDI A4 1998 B5 / 1.G AWM Engine Secondary Air System User Guide A4 1998 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/942/w960_942-0.png AUDI A4 1998 B5 / 1.G AWM Engine Secondary Air System User Guide

Page 11 of 26

AUDI A4 1998 B5 / 1.G AWM Engine Secondary Air System User Guide 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 12 of 26

AUDI A4 1998 B5 / 1.G AWM Engine Secondary Air System User Guide contact  
1   Engine Ground  
-  Operate starter briefly. 
LED must light up. 
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Page 13 of 26

AUDI A4 1998 B5 / 1.G AWM Engine Secondary Air System User Guide 26-52
       If the LED does not light up:  
     
-  Check wiring from contact 1 on the connector 
via the fuse to the fuel pump relay for an open 
circuit: 
     
       Electrical Wiring Diagrams,

Page 14 of 26

AUDI A4 1998 B5 / 1.G AWM Engine Secondary Air System User Guide 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 15 of 26

AUDI A4 1998 B5 / 1.G AWM Engine Secondary Air System User Guide 26-54
 
  
Secondary Air Injection (AIR) Pump relay -
J299- / Secondary Air Injection (AIR) Pump 
motor -V101-, checking
 
Special tools and equipment  
 
VAG 1526 A
 VAG 1527 B
 VAG 1594 A
 VAG 1598/

Page 16 of 26

AUDI A4 1998 B5 / 1.G AWM Engine Secondary Air System User Guide 26-55
      
Test requirements:  
     
Vehicle diagnostic, testing and information 
system VAS 5051 or VAG 1551 Scan Tool. 
     
Test sequence  
     
-  Initiate output Diagnostic Test Mode (DTM) a

Page 17 of 26

AUDI A4 1998 B5 / 1.G AWM Engine Secondary Air System User Guide 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 1998 B5 / 1.G AWM Engine Secondary Air System User Guide 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 1998 B5 / 1.G AWM Engine Secondary Air System User Guide 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 1998 B5 / 1.G AWM Engine Secondary Air System User Guide 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
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