Volkswagen Workshop Service and Repair Manuals

Special tools, testers, measuring instruments and auxiliary items required

• ◆ Fault reader V.A.G 1551 with cable V.A.G 1551/3

Note:

The vehicle system tester V.A.G 1552 can be used instead of the fault reader V.A.G 1551, however a print-out is not possible.

Check conditions

• ● Battery voltage at least 11 V
• ● Fuse 21 OK.

• ● Earth connections on front of clutch housing/on cylinder head OK.

Work sequence

• ‒ → Remove ashtray and slide cover for diagnostic connections to left -arrow-.
• ‒ Connect fault reader V.A.G 1551 with cable V.A.G 1551/3.

After the fault reader has been connected:

• ‒ Depending upon desired function:
  Switch ignition on
       or
  Start engine , Table "Selectable functions".

Notes:

• ◆ If the display remains blank, check diagnostic connector voltage supply =>Fault finding programme in "Current flow diagrams, Electrical fault finding and Fitting locations" binder
• ◆ If the display does not indicate as described in the work sequence:

=> Fault reader operating instructions

• ◆ If due to an input fault "Fault in the data transfer!" is displayed, pull wire off fault reader, reconnect and repeat work step.

* Appears alternately

• ‒ Operate fault reader taking into account the information on the display:
• ‒ Press key 1 for "Rapid data transfer".
• ‒ Press keys 0 and 1 for address word "Engine electronics" and confirm entry with Q key.

• ◆ 032 906 030G = Part No. of control unit
• ◆ Marelli 1AV = System designation and version
• ◆ 1949 = Programme level number

• ‒ Press the ⇒key.

• ‒ Further measures see repair procedures.