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 conditions

• ● Sender fault is recognised by self diagnosis

Test sequence

• ‒ Pull plug off sender (distributor).
• ‒ → Connect multimeter to measure voltage with aux. cables from V.A.G 1594 to the outer contacts of the plug.
• ‒ Switch on ignition.
       Specification: At least 10 V
• ‒ Switch off ignition.

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

• ‒ → Check wiring between test box and 3 pin connector for open circuit according to current flow diagram.
       Contact 1+socket 35
       Contact 2+socket 44
       Contact 3+socket 45
       Wire resistance: Max. 1.5 ω
• ‒ Additionally check wires for short to one another.
       Contact 3+socket 44
       Contact 3+socket 35
       Contact 2+socket 35
       Specification: ∞ω
• ‒ Additionally check wiring for sender earth -socket 35- for short to vehicle earth.
       Sockets 01 + 35
       Socket 35 + vehicle earth
       Specification: ∞ω

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

• ‒ Renew distributor with Hall sender
  =>Page 28-4 , Item 17 .

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

• ‒ Renew Simos control unit (J361)
  =>Page 24-10 , item 4 .