VW Golf Mk3 Workshop Service & Repair Manuals

Engine codes ABU, AEA only

Special tools, testers and auxiliary items

• ◆ Hand multimeter V.A.G 1526 or multimeter V.A.G 1715
• ◆ Diode test lamp V.A.G 1527
• ◆ Test box V.A.G 1598/18
• ◆ Adapter set V.A.G 1594
• ◆ Current flow diagram

Test conditions

• ● Fuse 15 OK.

Test sequence

• ‒ Remove air intake elbow.
• ‒ → Pull back rubber boot on throttle valve positioner (V60) plug.
• ‒ Connect diode test lamp V.A.G 1527 with aux. cables from V.A.G 1594 to contacts 2+4.
• ‒ Initiate final control diagnosis .
  When activating the throttle valve positioner the LED must
       flicker.

If the LED does not flicker:

• ‒ Input 06 for "End output" and confirm with Q.
• ‒ → Pull connector -1- off throttle valve positioner -2-.
• ‒ Connect multimeter with aux. cables from V.A.G 1594 to measure voltage at contacts 3+4 of connector.
       Specification: At least 11 V
• ‒ Switch off ignition

• ‒ → Connect test box V.A.G 1598/18 to control unit wiring loom.
• ‒ Check wiring between test box and 6 pin connector for open circuit according to current flow diagram.
       Contact 2+socket 16
       Contact 3+socket 23
       Contact 4+socket 20
       Wire resistance: Max. 1.5 ω
• ‒ Additionally check wires for short to one another.
       Specification: ∞ω

If no wiring fault is detected and voltage was present between contacts 3+4:

• ‒ Replace throttle valve positioner (V60).

If no wiring fault is detected and no voltage was present between contacts 3+4:

• ‒ Check wiring from contact 3 to relay plate and from contact 4 to engine earth according to current flow diagram.