Volkswagen Workshop Service and Repair Manuals

Only for engine code ABD 09.94▸, ABU, AEA

Special tools, testers and auxiliary items

• ◆ Fault reader V.A.G 1551 or vehicle system tester V.A.G 1552 with
       ▸ 07.93: Cable V.A.G 1551/1
       08.93 ▸: Cable V.A.G 1551/3
• ◆ Hand multimeter V.A.G 1526 or multimeter V.A.G 1715
• ◆ Test box V.A.G 1598/18
• ◆ Adapter set V.A.G 1594
• ◆ Current flow diagram

Test conditions

• ● Speedometer OK., checking:

=> Repair group 90; Electrical system

Test sequence

Note:

To check the speed signal the vehicle must be driven. To do this a second person is necessary.

• ‒ Connect fault reader V.A.G 1551 (V.A.G 1552) and select engine electronics control unit (address word 01); carry out selection at idling.
  

• ‒ Input 08 for "Read measured value block" function and confirm with Q.

• ‒ Input 04 for "Display group number" and confirm with Q.

• ‒ Carry out test drive and when doing this observe display (2nd person necessary).
• ‒ Observe displayed figure in display zone 3:
       Specification:
       0...4 km/h = 0
       4...7 km/h = >4
       above 7 km/h = >7
• ‒ Press ⇒ key.
• ‒ Input 06 for "End output" and confirm with Q.

If no speed is indicated:

• ‒ Switch off ignition

• ‒ → Connect test box V.A.G 1598/18 to control unit wiring loom.
• ‒ Connect multimeter to sockets 20+36 to measure voltage.
• ‒ Switch on ignition.
• ‒ Raise left front wheel or push vehicle. The voltage figure must fluctuate between
       0...at least 4 V.