SEAT Workshop Service and Repair Manuals

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

• ◆ Fault reader V.A.G 1551 or vehicle system tester V.A.G 1552 with cable V.A.G 1551/3
• ◆ 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

Check conditions

• ● The battery voltage must be at least 11.5 V.
• ● Fuse 14 must be OK.
• ● Fuel pump relay must be OK

Test sequence

• ‒ Connect the fault reader V.A.G 1551 (V.A.G 1552). Then switch ignition on and select engine control unit with the "Address word" 01.
  (Connecting fault reader and selecting engine control unit .)

• ‒ → Pull 3 pin connector -1- off Hall sender -2-.
• ‒ Connect multimeter to measure voltage using aux. cables from V.A.G 1594 to the outer contacts of the connector.
• ‒ Initiate final control diagnosis => Page 01-61 and check voltage supply for Hall sender.
      Specification: at least 9.0 V

If no voltage is present:

• ‒ Connect multimeter to measure voltage to contact 1 and earth using aux. cables from V.A.G 1594.
      Specification: at least 9.0 V

If voltage is still not present:

• ‒ Switch off ignition.
• ‒ Check wiring from contact 1 to fuel pump relay (J17) according to current flow diagram.

=> Current flow diagrams, Electrical fault finding and Fitting locations binder

If the specification is attained:

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

• ‒ → Check wiring between test box and connector for open circuit according to current flow diagram.
      Contact 2+socket 76
      Contact 3+socket 67
      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 (G40).

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

• ‒ Renew engine electronics control unit => Page 24-105.