Volkswagen Workshop Service and Repair Manuals

Special tools, workshop equipment, testers, measuring instruments and auxiliary items required

• ◆ Fault reader V.A.G 1551 (or vehicle system tester V.A.G 1552) with cable V.A.G 1551/3

Work sequence

Note:

All functions which could previously be performed with V.A.G 1551/1552 can also be performed with the new tester VAS 5051.

• ‒ Connect fault reader V.A.G 1551 (V.A.G 1552). Start engine and select "Address word" 01 of engine control unit. When doing this the engine must be running at idling speed.
  (Connecting fault reader and selecting engine control unit .)

Only when engine does not start:

• ‒ Operate the starter for at least 5 seconds. Then do not switch the ignition off.

• ‒ Switch on fault reader printer with the print key. The warning lamp in key must light up.

• ‒ Operate fault reader taking into account the information on the display:
• ‒ Press keys 0 and 2 for function "Interrogate fault memory" and confirm entry with Q key.

If no fault is stored:

• ‒ Press ⇒key.

If one or more faults are stored:

The stored faults will be displayed and printed out one after the other.

• ‒ Press keys 0 and 5 for the function "Erase fault memory" and confirm entry with Q key.

Note:

If the ignition is switched off between "Interrogate fault memory" and "Erase fault memory" the fault memory will not be erased.

• ‒ Press ⇒key.

• ‒ Press keys 0 and 6 for the function "End output" and confirm entry with the Q key.
• ‒ Switch off ignition.
• ‒ Rectify faults printed out using fault table:
  SAE P0 codes=> Page 01-37
• ‒ Erase the learnt values and adapt the engine control unit again=> Page 24-128 .