volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

ABOUT US
Exhaust system > < Adapting functions and components

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 5051/5A- or diagnosis cable -VAS 5051/6A-
Procedure
–  Connect vehicle diagnostic, testing and information system -VAS 5051B- as follows:
  W00-10224
–  Pull cover -1- off in direction of arrow.
–  Connect diagnosis cable -VAS 5051/5A- or diagnosis cable -VAS 5051/6A- to diagnosis connector.
–  Start engine and run at idling speed.
Only when engine does not start:
–  Switch on ignition.
Select operating mode:
–  Press button on display for „Vehicle self-diagnosis“.
Select vehicle system:
–  Press button „01 - Engine electronics“ on display.
  N01-0144
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 button „02 - Read fault memory“ 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 button „05 - Clear fault memory“ on display.
–  Press function „06-End output“.
  Note
If an emissions test is to be performed after the fault memory is erased, generate readiness code → Chapter.
  A87-0314

Exhaust system > < Adapting functions and components