AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking

AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking A6 1995 C5 / 2.G AUDI AUDI https://www.carmanualsonline.info/img/6/1067/w960_1067-0.png AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking
Trending: heating, air condition, display, buttons, lock, catalytic converter, check engine

Page 41 of 63

AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking 24-109
 Evaluation of display group 037 and 038  Display field: 2  
Possible cause  
Corrective action  
constant 
about 0.450 V   
Open circuit in wire 4 between oxygen sensor 
and control module - C

Page 42 of 63

AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking 24-110
      
If specified value in display group 037 and 
038 display field 3 or 4 is not obtained:  
     
-  Search for leaking air at exhaust system or 
catalytic converter (check screw clamps and

Page 43 of 63

AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking 24-111
      
Checking primary voltage  
      Component location of harness connectors   
Overview of component locations - page   Page 
24
-5   
     
-  Disconnect 4-pin harness connector leading t

Page 44 of 63

AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking 24-112
      
Testing Oxygen Sensor Wires  
      Component location of harness connectors   
Overview of component locations, page   Page 
24
-5   
     
-  Disconnect green 4-pin harness connector 1

Page 45 of 63

AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking 24-113
 
    
If no malfunctions are found in wires:  -  Check shielded wire for short circuit to sensor wires.Harness connector  
Terminal  
VAG1598/31 test box  
Socket  
3   32  
4   32  
-  Replac

Page 46 of 63

AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking 24-114
      
Check oxygen sensor wires for Oxygen 
Sensor (O2S) 2 Behind Three Way Catalytic 
Converter (TWC) -G131-.  
      Component location of harness connectors   
Overview of component locatio

Page 47 of 63

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Page 48 of 63

AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking 24-115
 
    
If no malfunctions are found in wires:  -  Check shielded wire for short circuit to sensor wires.Harness connector  
Terminal  
VAG1598/31 test box  
Socket  
3   32  
4   32  
-  Replac

Page 49 of 63

AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking 24-116
 
  
Oxygen sensor heating for oxygen 
sensors before and behind catalytic 
converter, checking
 
Special Tools and Equipment  
 
VAG1526A
 VAG1594A
 VAG1598/31
 VAG1788/10 RPM adjuster
 VAS505

Page 50 of 63

AUDI A6 1995 C5 / 2.G ATQ Engine Oxygen Sensor Control Checking 24-117
      
Note:  
     The heating circuit of the oxygen sensor is 
monitored by On Board Diagnostic (OBD),  
     Check DTC memory   Page 01
-15
 . 
     
-  Connect VAS5051 tester or VAG1551 sca
Trending: oil change, relay, battery location, check engine, battery, lock, buttons