Volkswagen Workshop Service and Repair Manuals

Special tools, testers, measuring instruments and auxiliary items required

• ◆ 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

• ● Fault on Hall sender recognised by self diagnosis

Test sequence

• ‒ Pull connector off Hall sender (distributor).
• ‒ → Connect multimeter to measure voltage using aux. cables from V.A.G 1594 to the outer contacts of the connector.
• ‒ Switch on ignition.
       Specification: min. 9 V
• ‒ Switch off ignition.

• ‒ → Connect test box V.A.G 1598/18 to control unit wiring loom.
• ‒ Check wiring between test box and connector for open circuit according to current flow diagram.
       Contact 1+socket 17
       Contact 2+socket 13
       Contact 3+socket 8
       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 1+3:

• ‒ Renew Hall sender , item 6 .

If no wiring fault is detected and no voltage was present between contacts 1+3:

• ‒ Renew engine control unit
  => Page 24-11 , item 28