diagram AUDI A8 1995 D2 / 1.G AHA Engine Auxiliary Signals Checking Workshop Manual

AUDI A8 1995 D2 / 1.G AHA Engine Auxiliary Signals Checking Workshop Manual A8 1995 D2 / 1.G AUDI AUDI https://www.carmanualsonline.info/img/6/1041/w960_1041-0.png AUDI A8 1995 D2 / 1.G AHA Engine Auxiliary Signals Checking Workshop Manual

Page 1 of 22

AUDI A8 1995 D2 / 1.G AHA Engine Auxiliary Signals Checking Workshop Manual 24-164
 
     
Auxiliary signals, checking 
     
Signal from A/C compressor, checking
 
     
Required special tools and test equipment  
     
VAG1551 or VAG1552 Scan Tool (ST) with 
VAG1551/3 adapt

Page 6 of 22

AUDI A8 1995 D2 / 1.G AHA Engine Auxiliary Signals Checking Workshop Manual 24-167
      
Continuation  
      If the displayed values are NOT OK:  
     
-  Connect VAG1598/22 test box to ECM harness 
connector  page 01
-67
 . 
     
-  Check wiring for open circuit, short c

Page 8 of 22

AUDI A8 1995 D2 / 1.G AHA Engine Auxiliary Signals Checking Workshop Manual 24-168
      
Vehicle speed signal, checking
 
     
Required special tools and test equipment  
     
VAG1551 or VAG1552 Scan Tool (ST) with 
VAG1551/3 adapter cable 
     Multimeter US1119 (Fluke 83

Page 13 of 22

AUDI A8 1995 D2 / 1.G AHA Engine Auxiliary Signals Checking Workshop Manual 24-171
      
Continuation  
      If no speed was indicated:  
    
Notes: 
If the LED does not blink:  
If the wiring is OK and the LED does not blink:  
 Repair Manual, Electrical Equipment, Repair

Page 15 of 22

AUDI A8 1995 D2 / 1.G AHA Engine Auxiliary Signals Checking Workshop Manual 24-172
      
CAN-Bus, checking
 
      When a CAN-Bus malfunction is indicated during 
a check of DTC memory of the Engine Control 
Module (ECM), refer to the following test to 
eliminate the malfunc

Page 16 of 22

AUDI A8 1995 D2 / 1.G AHA Engine Auxiliary Signals Checking Workshop Manual 24-173
      
Checking  
     
-  Check DTC memory of Transmission Control 
Module (TCM). 
       Repair Manual, 5 Spd. Automatic 
Transmission 01V, Repair Group 01        If a DTC regarding the CAN-B

Page 19 of 22

AUDI A8 1995 D2 / 1.G AHA Engine Auxiliary Signals Checking Workshop Manual 24-175
      
Test requirements  
     
ECM coding OK   page 01
-14
 
     
Test sequence  
     
-  Switch ignition off.
     
-  Connect VAG1598/22 test box to ECM harness 
connector  page 01
-67
 .

Page 22 of 22

AUDI A8 1995 D2 / 1.G AHA Engine Auxiliary Signals Checking Workshop Manual 24-177
      
-  Conduct a test drive (  Safety precautions   
page 24
-9 ). 
     
-  Check DTC memory of ECM   page 01
-16
 .
      If only the DTC "Fuel level too low" (SAE P1250 / 
VAG 17658) is s