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Self-diagnosis - general aspects > < Ignition system: Repairing

Leon Mk1

  • Power unit
  • Motronic Injection and Ignition System
  • Self diagnosis, V.A.G Inspection Service
  • Fault memory

Interrogating and erasing fault memory:
Interrogating and erasing fault memory:
Special tools and workshop equipment required
   
t  Fault reader -V.A.G 1551- (or vehicle system tester -V.A.G 1552-) with cable -V.A.G 1551/3B-
Work sequence
–  Connect fault reader -V.A.G 1551- (-V.A.G 1552-) and select engine electronics control unit with the “address code” 01. When doing so, the engine should be idling. Fault reader: Connecting and selecting the engine electronics control unit → Chapter.
Only when engine does not start:
–  Operate the starter for about 6 seconds. Then do not switch the ignition off.
–  Switch the fault reader printer on by pressing the Print key. The warning lamp in the key must light up.
  W00-0459
Indicated on the display:
–  Operate the fault reader taking into account the information on the display:
–  Select function mode 1 “ Rapid data transfer”.
–  Press keys 0 and 1 for function “Engine Electronics” and confirm entry with the Q key.
–  Press the → key.
  
Rapid data transfer                 HELP
Select function XX
Indicated on the display:
–  Press keys 0 and 2 for function “Interrogate fault memory” and confirm entry with the Q key.
  
Rapid data transfer                 HELP
Select function XX
The display will show either the number of faults stored or “No fault recognised”.
–  Press the → key.
If one or more faults are stored:
The stored faults will be displayed and printed out one after the other.
  
X faults recognised                     

      

      

    
      

      

    
After the stored faults have been printed out, the display will show:
– 
          Press keys 0 and 5 for the function “Erase fault memory” and confirm entry with the Q key.
 
      Note!
If the ignition is switched off between “Interrogate fault memory” and “Erase fault memory” the fault memory will not be erased.

      		 
      
    
Rapid data transfer                 HELP
Select function XX                      

      

      

    
      

      

    
Indicated on the display:
– 
          Press the → key.

      		 
      
    
Rapid data transfer                   ->
Fault memory is erased                  

      

      

    
      

      

    
Indicated on the display:
– 
          Press keys 0 and 6 for the “End output” function and confirm input with the Q key.
– 
          Correct faults printed out using fault table  → Chapter
– 
          After rectifying faults, a test drive should be carried out.
– 
          During the test drive, the following operating conditions must be fulfilled:
t 
           The coolant temperature must exceed 80 °C.
t 
           When the temperature is reached, the operating conditions must be reached several times Idling Part throttle Full throttle Deceleration 
t 
           At full throttle, revolutions must exceed 3,500 rpm.
– 
          Again interrogate the control unit fault memory.
If no fault is stored:
– 
          Press the → key.

      		 
      
    
Rapid data transfer                 HELP
Select function XX                      

      

      

    
      

      

    
Indicated on the display:
– 
          Press keys 0 and 6 for the “End output” function and confirm input with the Q key.
– 
          Switch off ignition.
 
      Note!
If the self-diagnosis has not detected faults, you must refer to the corresponding fault table in “Fault finding, Engine” folder to continue with fault finding.

      		 
      
    
Rapid data transfer                 HELP
Select function XX                      

      

      

    

  • Power unit 
  •  Motronic Injection and Ignition System 
  •  Self diagnosis, V.A.G Inspection Service 
  •  Fault memory

Self-diagnosis - general aspects >
< Ignition system: Repairing