Volkswagen Workshop Service and Repair Manuals

Special tools, workshop equipment, testers, measuring instruments and auxiliary items required

• ◆ Test box V.A.G 1598/22
• ◆ Hand multimeter V.A.G 1526 or multimeter V.A.G 1715
• ◆ Adapter set V.A.G 1594
• ◆ Current flow diagram

Test conditions

• ● Sender fault is recognised by self diagnosis

Test sequence

• ‒ → Pull 3-pin connector off Hall sender -arrow-.

• ‒ → Connect multimeter using aux. cables from V.A.G 1594 to measure voltage at contacts 1 (positive) and 3 (earth) of Hall sender connector.
• ‒ Switch on ignition.
       Specification: 4.0...6.0 V
• ‒ Switch off ignition.

If no voltage is present:

• ‒ → Connect test box V.A.G 1598/22 to control unit wiring harness.

• ‒ → Check wiring between test box and 3 pin connector for open circuit using current flow diagram.
       Contact 1+socket 62
       Contact 2+socket 76
       Contact 3+socket 70
       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:

• ‒ Replace Hall sender (G40)
  , item 11 .

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

• ‒ Renew engine control unit .