Volkswagen Workshop Service and Repair Manuals

Special tools, testers and auxiliary items

• ◆ 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 sequence

• ‒ → Pull 3 pin connector off Hall sender.
• ‒ Connect multimeter using aux. cables from V.A.G 1594 to measure voltage at contacts 1+3 of connector.
• ‒ Switch on ignition.
• ‒ Measure voltage between contacts 1+3.
       Specification: 9...14.5 V
• ‒ Switch off ignition.

If the specification is not obtained:

• ‒ → Connect test box V.A.G 1598/18 to control unit wiring loom -arrow-.

• ‒ → Check wiring between test box and 3 pin connector for open circuit according to current flow diagram.
       Contact 1+socket 56
       Contact 2+socket 44
       Contact 3+socket 41
       Wire resistance: Max. 1.5 ω
• ‒ Check the wire between 3 pin connector and relay plate for open circuit using current flow diagram.
       Contact 3+relay plate
       Wire resistance: max. 1.5 ω

• ‒ Additionally check all wires for short to one another.
       Contact 3+socket 44
       Contact 3+socket 56
       Contact 2+socket 56
       Specification: ∞ω

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

• ‒ Renew distributor with Hall sender
  , Item 17 .

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

• ‒ Renew Motronic control unit (J220)
  , item 12 .
• ‒ Read-out the readiness code=> Page 01-35 .