SEAT Workshop Service and Repair Manuals

Special tools, 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
• ◆ Adapter set V.A.G 1594
• ◆ Hand multimeter V.A.G 1526 or multimeter V.A.G 1715
• ◆ Current flow diagram

Note:

To check the speed signal the vehicle must be driven. To do this a second person is necessary.

Test sequence

• ‒ Connect fault reader V.A.G 1551 (V.A.G 1552) and select engine electronics control unit with the "Address word" 01. When doing this the engine must be running at idling speed.
  (Connecting fault reader and selecting engine electronics control unit .)

• ‒ Press keys 0 and 8 for the function "Read measured value block" and confirm entry with Q key.

• ‒ Press keys 0, 0 and 6 for "Display group number 6" and confirm entry with Q key.
• ‒ Carry out test drive and when doing this observe display (2nd person necessary).

• ‒ Press ⇒key.
• ‒ Press keys 0 and 6 for the function "End output" and confirm entry with the Q key.

If no speed is indicated:

• ‒ 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.
• ‒ Check wiring from connector contact 43 from engine control unit to dash panel insert for open/short circuit.

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