1996 AUDI A4 APB Engine Ignition System Checking

Page 25 of 64

AUDI A4 1996 B5 / 1.G APB Engine Ignition System Checking follows: 
Pa
ge 25 of 64 I
gnition s
ystem, checkin
g
11/22/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.FU04.28.1

Page 26 of 64

AUDI A4 1996 B5 / 1.G APB Engine Ignition System Checking 28-23
      
-  Connect VAG1598/31 test box to wiring harness 
for engine control module. Do not connect to the 
engine control module itself   Page 24
-20
 . 
    
Specified value: max. 1  .  
Specif

Page 27 of 64

AUDI A4 1996 B5 / 1.G APB Engine Ignition System Checking 28-24
       If the values are not as specified:  
     
-  Rectify short or open circuit in wiring between 
sender connector and control module connector.
     
Terminal on sensor 
connector  
Termin

Page 28 of 64

AUDI A4 1996 B5 / 1.G APB Engine Ignition System Checking 28-25
      
Engine Coolant Temperature (ECT) 
sensor -G62, checking
 
     
Note:  
     Component location of coolant temperature 
sensor  Page 24
-5 . 
     
Test conditions 
     
Engine cold

Page 29 of 64

AUDI A4 1996 B5 / 1.G APB Engine Ignition System Checking 28-26
 
Rapid data transfer 
HELP
Select function XX
    
Indicated on display  
-  Press buttons -0- and -8- to select function "Read Measuring Value 
Block" and confirm entry with -Q- button. 
Read

Page 30 of 64

AUDI A4 1996 B5 / 1.G APB Engine Ignition System Checking 28-27
 
  
Display fields  
  
1   2   3   4  
Display Group 004: Coolant temperature with engine idle  
Display   xxxx RPM   xx.xxx V  
xxx.x C  
xxx.x C  
Indicates   Engine speed RPM   Battery volt

Page 31 of 64

AUDI A4 1996 B5 / 1.G APB Engine Ignition System Checking 28-28
       If display field 3 does not display a realistic 
value:  
     
-  Disconnect harness connector from coolant 
temperature sensor. 
     
Coolant temperature sensor with square 
connector:

Page 32 of 64

AUDI A4 1996 B5 / 1.G APB Engine Ignition System Checking 28-29
      
Coolant temperature sensor with oval 
connector: 
    
All: 
Scale A shows resistance values for temperature range 0 - 50 C and 
scale B the values for temperature range 50 - 100 C.  -  C