AUDI A4 1999 B5 / 1.G AFC Engine Heated Oxygen Sensor After Converter Checking Workshop Manual

AUDI A4 1999 B5 / 1.G AFC Engine Heated Oxygen Sensor After Converter Checking Workshop Manual A4 1999 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/1021/w960_1021-0.png AUDI A4 1999 B5 / 1.G AFC Engine Heated Oxygen Sensor After Converter Checking Workshop Manual

Page 1 of 7

AUDI A4 1999 B5 / 1.G AFC Engine Heated Oxygen Sensor After Converter Checking Workshop Manual 24-53
 
     
Heated Oxygen Sensor 
(HO2S) after Three Way 
Catalytic Converter (TWC), 
checking 
     
Notes:  
     
G130 = O2S behind three way catalytic 
converter, bank 1 
     G131 = O2S behind

Page 2 of 7

AUDI A4 1999 B5 / 1.G AFC Engine Heated Oxygen Sensor After Converter Checking Workshop Manual If the wiring is OK (no continuity):  -  Replace heated oxygen sensor.
    
-  Switch multimeter (Fluke 83 or equivalent) to measure voltage (2 volt 
range) and connect between harness connector termi

Page 3 of 7

AUDI A4 1999 B5 / 1.G AFC Engine Heated Oxygen Sensor After Converter Checking Workshop Manual 24-54
      
-  Switch ignition ON.
     
  
Specified value: 400   50 mV      If the specified value is not obtained, check 
wiring to ECM as follows:  
     
-  Switch ignition OFF.
     
-  Connect

Page 4 of 7

AUDI A4 1999 B5 / 1.G AFC Engine Heated Oxygen Sensor After Converter Checking Workshop Manual       If the specified value is not obtained:  
    
If wiring OK:  -  Eliminate open or short circuit using wiring diagram.
- Replace ECM   page 01
-265
 .
Pa
ge 4 of 7 Heated Ox
yg
en Sensor 
(HO2S

Page 5 of 7

AUDI A4 1999 B5 / 1.G AFC Engine Heated Oxygen Sensor After Converter Checking Workshop Manual 24-55
      
Oxygen sensor heater, checking  
     
Notes:  
     
Z29 = Oxygen Sensor (O2S) heater, bank 1
     Z30 = Oxygen Sensor (O2S) heater, bank 2
     For functional check of O2S heater -Z29-

Page 6 of 7

AUDI A4 1999 B5 / 1.G AFC Engine Heated Oxygen Sensor After Converter Checking Workshop Manual   
Specified value: max. 1   
Pa
ge 6 of 7 Heated Ox
yg
en Sensor 
(HO2S
) after Three Wa
y Catal
ytic Converter 
(TWC
), checkin
g
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&

Page 7 of 7

AUDI A4 1999 B5 / 1.G AFC Engine Heated Oxygen Sensor After Converter Checking Workshop Manual 24-56
      
-  Check wiring for continuity between terminals 2 
and 8 on ECM connector E. 
     
  
Specified value: max. 1        
-  Check wiring for continuity between terminals 2 
and 3 of ECM co