AUDI A4 1997 B5 / 1.G ATQ Engine Ignition System Checking Owner's Manual

AUDI A4 1997 B5 / 1.G ATQ Engine Ignition System Checking Owner's Manual A4 1997 B5 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/1062/w960_1062-0.png AUDI A4 1997 B5 / 1.G ATQ Engine Ignition System Checking Owner's Manual
Trending: check engine, immobilizer, lock, wiring, oil pressure, torque, sensor

Page 21 of 65

AUDI A4 1997 B5 / 1.G ATQ Engine Ignition System Checking Owners Manual 28-18
       If no malfunctions are found in wire:  
     
Check sensor:  
     
-  Disconnect connector from Intake Air 
Temperature (IAT) sensor. 
    
Specified values  
Example:  
If air temperatu

Page 22 of 65

AUDI A4 1997 B5 / 1.G ATQ Engine Ignition System Checking Owners Manual 28-19
 
  
Engine speed (RPM) sensor -G28-, 
checking
 
Special Tools and Equipment  
 
VAG1526A
 VAG1594A
 VAG1598/31
Pa
ge 22 of 65 I
gnition s
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Page 23 of 65

AUDI A4 1997 B5 / 1.G ATQ Engine Ignition System Checking Owners Manual 28-20
       Component location   Overview of Component 
Locations, page   Page 24
-5   
     
Note:  
     The engine speed (RPM) sensor detects RPM 
and reference marks. The engine cannot be 
starte

Page 24 of 65

AUDI A4 1997 B5 / 1.G ATQ Engine Ignition System Checking Owners Manual 28-21
       If specified value is not obtained:  
     
-  Replace engine speed (RPM) sensor.
      If specified value is obtained:  
    
If specified value is not obtained:  
If specified value is

Page 25 of 65

AUDI A4 1997 B5 / 1.G ATQ Engine Ignition System Checking Owners Manual 28-22
 
    
If no malfunctions are found in wires:  -  Check the following wire connections for open circuit and short circuit 
to Ground (GND) and B+: Harness connector  
Terminal  
VAG1598/31 test

Page 26 of 65

AUDI A4 1997 B5 / 1.G ATQ Engine Ignition System Checking Owners Manual 28-23
 
  
Engine Coolant Temperature (ECT) sensor 
-G62-, checking
 
Special Tools and Equipment  
 
VAG1526A
 VAG1594A
 VAG1598/31
 VAS5051 with VAG5051/1
- or 
 VAG1551 with VAG1551/3B
Pa
ge 26 of

Page 27 of 65

AUDI A4 1997 B5 / 1.G ATQ Engine Ignition System Checking Owners Manual 28-24
       Component location   Overview of Component 
Locations, page   Page 24
-5   
     
Test requirement:  
     
Engine cold 
     
Test sequence  
     
-  Connect VAS5051 tester or VAG1551 s

Page 28 of 65

AUDI A4 1997 B5 / 1.G ATQ Engine Ignition System Checking Owners Manual 28-25
 
  
Display fields  
  
1   2   3   4  
Display group 004: Coolant temperature, engine at idle  
Display   xxxx/min   xx.xxx V  
xxx.x C  
xxx.x C  
Indicated  Engine speed 
(RPM)  Battery volt

Page 29 of 65

AUDI A4 1997 B5 / 1.G ATQ Engine Ignition System Checking Owners Manual 28-26
      
Coolant temperature sensor with square 
connector: 
    
Coolant temperature sensor with oval connector:  -  Connect multimeter between terminal 1 and 3 of connector for 
resistance measu

Page 30 of 65

AUDI A4 1997 B5 / 1.G ATQ Engine Ignition System Checking Owners Manual 28-27
      
All models 
      Range A shows the resistance values for the 
temperature range from 0-50  C, and range B 
shows the values for the temperature range from 
50-100 C.  
    
Read-out exam
Trending: immobilizer, oil pressure, wiring, display, lock, sensor, diagram