ECO mode AUDI TT 1997 8N / 1.G AEB ATW Engines Secondary Air System Workshop Manual
[x] Cancel search | Manufacturer: AUDI, Model Year: 1997, Model line: TT, Model: AUDI TT 1997 8N / 1.GPages: 16, PDF Size: 0.21 MB
Page 6 of 16

26-34
      
Test requirement 
     
Output Diagnostic Test Mode (DTM) 
performed 
     
Checking internal resistance  
     
-  Disconnect green harness connector from 
Secondary Air Injection (AIR) solenoid valve -
N112-. 
    
-  Connect multimeter at valve for resistance measurement.
 
Specified value: 25-35 
-  If specified value is not obtained, replace Secondary Air Injection (AIR) 
solenoid valve -N112-. 
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Page 8 of 16

26-36
 
    
 Electrical Wiring Diagrams, Troubleshooting & Component Locations   
 Repair Manual, Fuel Supply System, Repair Group 20
   
Checking activation  
Check wire connection from terminal 1 of connector via fuse S234 (in 
fuse holder, socket 34) to Fuel Pump (FP) relay for open circuit: Check Fuel Pump (FP) relay 
    
-  Connect VAG1527B voltage tester between terminals 1 and 2 using 
test leads from VAG1594A. 
-  Connect VAG1551 scan tool.
-  Initiate output Diagnostic Test Mode (DTM) and activate Secondary Air 
Injection (AIR) solenoid valve -N112-. 
Output Diagnostic Test Mode Secondary Air Inj. Solenoid Valve -N112
    
Indicated on display  
 
LED must blink.
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Page 11 of 16

26-39
       Installation location:  
     
       Repair Manual, 1.8 Liter 4-Cyl. 5V Turbo Fuel 
Injection & Ignition, Repair Group 24        
-  Initiate output Diagnostic Test Mode (DTM) and 
activate Secondary Air Injection (AIR) pump 
relay -J299-.  
    
A - If relay does not trigger:  
B - If relay triggers, but Secondary Air Injection (AIR) pump does not run:   
The Secondary Air Injection (AIR) pump relay (in 3-socket relay 
carrier in the E-box, at left in plenum chamber, position 2) must 
trigger and the Secondary Air Injection (AIR) pump motor -V101- 
must run in intervals 
-  Check voltage supply of Secondary Air Injection (AIR) relay   Page 
26
-40
 . 
-  Checking activation of Secondary Air Injection (AIR) relay   Page 26
-
42
 . 
-  Check voltage supply for Secondary Air Injection (AIR) pump   Page 
26
-43
 . 
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Page 14 of 16

26-42
      
Checking activation of the Secondary Air 
Injection (AIR) pump relay  
     
-  Switch ignition off.
     
-  Remove Secondary Air Injection (AIR) pump 
relay. 
    
If LED does not blink:  -  Connect VAG1527B voltage tester as follows:3-socket relay carrier in E-box, plenum 
chamber, position 2  
terminal  
Measure to  
  
6   Engine Ground 
(GND)  
-  Initiate output Diagnostic Test Mode (DTM) and activate Secondary Air 
Injection (AIR) pump relay -J299-. 
 
LED must blink.
-  Switch ignition off.
-  Connect VAG1598/31 test box at wiring harness to ECM, do not 
connect ECM. 
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Page 15 of 16

26-43
 
    
If no malfunctions are detected:  
Checking voltage supply of the Secondary Air Injection (AIR) pump 
motor   -  Check the following wire connection for open circuit and short circuit to 
Ground (GND) and B+: 3-socket relay carrier in E-box, plenum 
chamber, position 2  
terminal  
VAG1598/31 test 
box  
socket  
6   46  
-  Repair open circuit or short circuit if necessary.
-  Replace Secondary Air Injection (AIR) pump relay -J299-.
-  Remove harness connector for Secondary Air Injection (AIR) pump 
motor -V101-. 
-  Connect VAG1527B voltage tester between terminals 1 and 2.
-  Initiate output Diagnostic Test Mode (DTM) and activate Secondary Air 
Injection (AIR) pump relay -J299-   Page 26
-42
 .  
 
LED must light.
Pa
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ystem, checkin
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gine code ATW
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yp
e=re
pair&id=AUDI.B5.GE02.26.2