Volkswagen Workshop Service and Repair Manuals

• ● Battery voltage OK.
• ● Fuse 21 or 22 OK.
• ● Earth connections on engine and gearbox OK.
  (Earth connection engine: on cylinder head).

• ‒ Connecting fault reader:

Vehicles ▸07.93

• ‒ → Unclip covers for diagnostic connections below the heating/ventilation controls.
• ‒ Connect fault reader V.A.G 1551 with cable V.A.G 1551/1 as follows:
• ‒ First connect black plug for the fault reader voltage supply to black diagnostic socket.

* Appears alternately

Note:

If the display remains blank:

=> Fault reader operating instructions

• ‒ Connect white plug to white diagnostic socket. (The blue plug is not required.)

Vehicles 08.93 ▸

• ‒ → Open ashtray, remove if necessary and slide cover for diagnostic connections to left -arrow-.
• ‒ Connect fault reader with cable V.A.G 1551/3.
• ‒ Depending upon desired function:
  Switch on ignition
       or
  Start engine.
• ‒ Operate fault reader taking into account the information on the display:
• ‒ Input 1 for "Rapid data transfer".
• ‒ Input 01 for address word "Engine electronics" and confirm with Q.

• ◆ 037 906 024D = Part No. of the control unit (for up-to-date control unit versions see parts catalogue)
• ◆ DIGIFANT = Injection system (Digifant)
• ◆ 1.7 = hardware version (build level) of control unit
• ◆ 1390 = software version (programme level number) of control unit
• ◆ Coding = Not used at present

• ‒ Press ⇒ key.

• ‒ Further measures see repair procedures.