SEAT 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 prerequisites:

• ● Battery voltage OK.

Test sequence

• ‒ Switch off ignition.
• ‒ Remove dash panel insert:

=> Electrical system; Repair group 90; dash panel insert; removing and installing dash panel insert

• ‒ → Connect test box V.A.G 1598/18 to control unit wiring loom.
• ‒ Bridge sockets 42+46 with auxiliary cables from V.A.G 1594.
• ‒ Measure voltage between following sockets:
      45+1, 68+1, 23+1 and 23+24
      Specification: approx. battery voltage

If the specification is not obtained:

• ‒ Check voltage supply relay terminal 30 (J317).
• ‒ Check wiring connections for open circuit, short circuit and transfer resistance at contacts according to current flow diagram.

If no fault is found in wiring and relay:

• ‒ Renew Diesel direct injection system control unit (J248) , item 9.