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SEAT Workshop Service and Repair Manuals

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Engine control unit > < O-rings for the injector pump: Replace.

Leon Mk2

Verification of cables and components using the test boxV.A.G 1598/42
Verification of cables and components using the test box -V.A.G 1598/42-
  Note
   
t  The test box -V.A.G 1598/42- has 105 pins. The engine control unit may be connected using 2 different adapter cables.
t  The engine control unit is connected to the cable harness of the vehicle by a 60 pin connector and a 94 pin connector.
t  For verifications on the 60 pin connector of the cable harness, the adapter cable -V.A.G 1598/39-1- is connected with the connector -A- to the test box. Components on the 60 pin connector of the cable harness → Current flow diagrams, Electrical fault finding and Fitting locations.
t  For verifications on the 94 pin connector of the cable harness, the adapter cable -V.A.G 1598/39-2- is connected with the connector -A- and -B- to the test box. Components on the 94 pin connector of the cable harness → Current flow diagrams, Electrical fault finding and Fitting locations.
t  The test box -V.A.G 1598/42- is designed in such a way that it may be connected, at the same time, to the cable harness going to the engine control unit and to the engine control unit itself. The advantage of this is that the engine control electronics can operate while the test box is connected (for example when measuring signals while the engine is working).
t  The relevant test procedure will state whether it is necessary to also connect engine control unit to test box.
t  For the connection of measurement equipment (for example voltage tester -V.A.G 1527 B-, hand-held multimeter -V.A.G 1526 A-, etc.) always use the auxiliary measurement set -V.A.G 1594 A-.
In order to separate the engine control unit connectors from the engine, the engine control unit must be separated from the engine → Chapter.
  WARNING
To avoid the destruction of the electronic components, before connecting the measurement cables, the correct measurement range must be selected and the test conditions must be complied with.
  A24-0622
–  Connect the test box -V.A.G 1598/42- with the adapter cable -V.A.G 1598/39-1- or the adapter cable -V.A.G 1598/39-2- to the cable harness. Secure the earth clamp of the test box to the negative terminal of the battery. The relevant test procedure will state whether it is necessary to also connect engine control unit to test box.
–  Carry out the verification as described in the corresponding repair process.
–  Once the verifications are done, fit the engine control unit → Chapter.
Following the initial connection of the engine control unit, the following operations must be carried out:
–  Consult and erase the fault memory → Chapter.
  A24-0622

Engine control unit > < O-rings for the injector pump: Replace.