AUDI A4 2000 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual

AUDI A4 2000 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual https://www.carmanualsonline.info/img/6/1005/w960_1005-0.png AUDI A4 2000 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual

Page 1 of 37

AUDI A4 2000 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual 24-88
 
     
Auxiliary input signals, 
checking 
     
Rear window defroster signal, checking
 
     
Requirement  
     
Engine Control Module (ECM) coding OK   
page 01
-247
 . 
     
Checking

Page 2 of 37

AUDI A4 2000 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual - 
Press  button.-  Select "End Output" function 06.
-  Press -Q- button to confirm input.
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Page 3 of 37

AUDI A4 2000 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual 24-89
       If display value does not change:  
     
-  Switch ignition OFF and connect VAG 1598/19 
test box to ECM harness connector   page 01
-
255
 . 
     
-  Connect VAG 1527B voltage tester b

Page 4 of 37

AUDI A4 2000 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual 24-90
      
A/C compressor shut-off signal, 
checking
 
     
Note:  
     The A/C compressor is switched off during 
acceleration by the Engine Control Module 
(ECM) and at wide open throttle by the

Page 5 of 37

AUDI A4 2000 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual No malfunctions stored in DTC memory 
     Vehicle at room temperature; above 15 C 
(59 F) 
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Page 6 of 37

AUDI A4 2000 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual 24-91
      
Checking  
     
-  Start engine and let idle. 
     
-  Switch A/C on, push "AUTO" button, set 
temperature to "LO" and blower speed to "HI". 
     
A/C compressor symbol must light up a

Page 7 of 37

AUDI A4 2000 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual Read measuring value block 4 1 2 3 4
    
Indicated on display; note value in display field 4  
CAUTION! 
Do not use the shift inputs (identified by an X) during the RPM 
increase check. 
-  Switch on

Page 8 of 37

AUDI A4 2000 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual 24-92
       If the specified values are obtained:  
     
- 
Press  button.     
-  Select "End Output" function 06.
     
-  Press -Q- button to confirm input.
      If display value changes:

Page 9 of 37

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Page 10 of 37

AUDI A4 2000 B5 / 1.G AFC Engine Auxiliary Input Signals Checking Workshop Manual 24-93
       If X1X_XX is displayed:  
     
-  Briefly press accelerator pedal to apply wide 
open throttle. 
     
Display must switch briefly to X0X_XX, then 
X1X_XX must appear again after several
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