AUDI A4 1996 B5 / 1.G AFC Engine Heated Oxygen Sensor Before Converter Checking Workshop Manual

AUDI A4 1996 B5 / 1.G AFC Engine Heated Oxygen Sensor Before Converter Checking Workshop Manual A4 1996 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/1022/w960_1022-0.png AUDI A4 1996 B5 / 1.G AFC Engine Heated Oxygen Sensor Before Converter Checking Workshop Manual
Trending: diagram, display, check engine, wiring, wiring diagram, lock

Page 1 of 7

AUDI A4 1996 B5 / 1.G AFC Engine Heated Oxygen Sensor Before Converter Checking Workshop Manual 24-49
 
     
Heated Oxygen Sensor 
(HO2S) before Three Way 
Catalytic Converter (TWC), 
checking 
     
Heated oxygen sensor, checking  
     
Notes:  
     
G39 = Heated Oxygen Sensor (HO2S), bank

Page 2 of 7

AUDI A4 1996 B5 / 1.G AFC Engine Heated Oxygen Sensor Before Converter Checking Workshop Manual If continuity obtained:  -  Replace heated oxygen sensor.
    
-  Switch multimeter to 2 volt range and connect between terminal 4 on 
harness connector and engine Ground (GND). 
Pa
ge 2 of 7 Heated O

Page 3 of 7

AUDI A4 1996 B5 / 1.G AFC Engine Heated Oxygen Sensor Before Converter Checking Workshop Manual 24-50
      
-  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 1996 B5 / 1.G AFC Engine Heated Oxygen Sensor Before Converter Checking Workshop Manual If wiring OK:  
- Replace ECM   page 01
-265
 .
Pa
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yg
en Sensor 
(HO2S
) before Three Wa
y Catal
ytic Converter 
(TWC
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11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Di

Page 5 of 7

AUDI A4 1996 B5 / 1.G AFC Engine Heated Oxygen Sensor Before Converter Checking Workshop Manual 24-51
      
Oxygen sensor heater, checking  
     
Notes:  
     
Z19 = Oxygen Sensor (O2S) heater, bank 1 
     Z28 = Oxygen Sensor (O2S) heater, bank 2
     For functional check of O2S heaters -Z19

Page 6 of 7

AUDI A4 1996 B5 / 1.G AFC Engine Heated Oxygen Sensor Before Converter Checking Workshop Manual   
Specified value: max. 1   
Pa
ge 6 of 7 Heated Ox
yg
en Sensor 
(HO2S
) before 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 1996 B5 / 1.G AFC Engine Heated Oxygen Sensor Before Converter Checking Workshop Manual 24-52
      
-  Check wiring for continuity between terminal 2 
(O2S heater -Z19-) and terminal 10 on ECM 
connector E. 
     
  
Specified value: max. 1        
-  Check wiring for continuity between
Trending: wiring, diagram, wiring diagram, lock, check engine, display