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Golf Mk4

Reading and erasing engine control unit fault memory
Reading and erasing engine control unit fault memory
Special tools and workshop equipment required
   
t  Vehicle diagnosis, testing and information system -VAS 5051B-
t  Diagnosis cable -VAS 5051/1- or -VAS 5051/3-
Procedure
–  Connect Vehicle diagnosis, testing and information system -VAS 5051 A- as follows:
Vehicles with engine codes AQP, AUE, BDE, BFH and BML:
–  Pull cover -1- off in -direction of arrow-.
  W00-1236
–  Attach diagnosis cable connector -VAS 5051/1- or -VAS 5051/3- to diagnosis connection.
Vehicles with engine code BJS:
  N01-0144
–  Attach diagnosis cable connector -2--VAS 5051/1- or -VAS 5051/3- to diagnosis connection -arrow-.
–  Start engine and run at idling speed.
Only when engine does not start:
–  Switch on ignition.
Selecting operating mode:
–  Press button on display for „Vehicle self-diagnosis“.
Selecting vehicle system:
–  Press „01 - Engine electronics“ button on display.
  N01-0587
The control unit identification with code -2- as well as chassis number and immobilizer identification number will be indicated in the centre section of the display.
  Note
A print-out can be made if required. Press the „Print“ button.
Select diagnostic function:
–  Press „02 - Read fault memory“ button on display.
–  If no fault is stored in engine control unit „0 fault detected“ is displayed.
–  If faults are stored in the engine control unit, these are shown one below the other on the display.
–  Press ← button.
–  Press „05 - Clear fault memory“ button on display.
–  Select „06-End output“ function.
  Note
If an emissions test is to be performed after the fault memory is cleared, generate the readiness code. → Vehicle diagnostic tester
  A87-0314

Exhaust system > < Adapting functions and components