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

Test sequence

• ‒ 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 .)

• ‒ Press keys 0 and 8 for the function "Read measured value block" and confirm entry with Q key.

• ‒ Press keys 0, 1 and 4 for "Display group number 14" and confirm entry with Q key.

• ‒ Check total number of misfires in display zone 3:
       Specification: 0...5
• ‒ Check misfire recognition status in display zone 4:
       Specification: activated

If the specifications are obtained:

• ‒ Press ⇒key.
• ‒ Press keys 0 and 6 for the "End output" function and confirm input with the Q key.
• ‒ Switch off ignition.

If the specifications are not attained:

• ‒ Check the spark plugs and ignition/HT cables
  => Page 28-2 , Removing and installing parts of the ignition system
• ‒ Check ignition coils with output stages
  => Page 28-10
• ‒ Check injectors => Page 24-64