Volkswagen Workshop Service and Repair Manuals

The engine control unit receives from the gearbox control unit the information:
     Driving range selected (selector lever in 2/3/4/R/D)
or
     No driving range selected (selector lever in P or N)

Special tools, 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 box V.A.G 1598/18
• ◆ Hand multimeter V.A.G 1526 or multimeter V.A.G 1715
• ◆ Adapter set V.A.G 1594
• ◆ Current flow diagram

Test conditions

• ● The selector lever of the automatic gearbox must be in "P" or "N" position.

Test sequence

• ‒ Connect the fault reader V.A.G 1551 (V.A.G 1552). Then switch ignition on and select engine control unit with the "Address word" 01.
  (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 3 for "Display group number 13" and confirm entry with Q key.

• ‒ Observe display zone 3. The display must read
       "Neutral".
• ‒ Depress foot brake and select driving range. The display must jump to
       "Gear engag".
• ‒ Press the ⇒key.

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

If the display does not change:

• ‒ → Connect test box V.A.G 1598/18 to control unit wiring loom.
• ‒ Check wiring between test box socket 7 and automatic gearbox for open circuit according to current flow diagram.
       Wire resistance: Max. 1.5 ω