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Removing and installing engine control unit - engine codes AVB, AVF and AWX > < Wiring and component check with adapter cable, 121-pinV.A.G 1598/31 (test box) - engine codes AVB, AVF, AWX

A4 Mk2

Wiring and component check with test boxV.A.G 1598/42 (engine codes BKE, BPW, BRB, BRC)
Wiring and component check with test box -V.A.G 1598/42- (engine codes BKE, BPW, BRB, BRC)
  Note
   
t  The test box -V.A.G 1598/42- has 105 sockets. It can be connected to the engine control unit via 2 different adapter cables.
t  The engine control unit is connected to the vehicle's wiring harness via two connectors, one of which has 60 pins, the other has 94 pins.
t  To carry out tests on the 60-pin wiring harness connector, the adapter cable -V.A.G 1598/39-1- is connected to connector -A- on the test box. For components connected to 60-pin wiring harness connector → Current flow diagrams, Electrical fault finding and Fitting locations.
t  To carry out tests on the 94-pin wiring harness connector, the adapter cable -V.A.G 1598/39-2- must be connected to connectors -A- and -B- on the test box. For components connected to 94-pin wiring harness connector → Current flow diagrams, Electrical fault finding and Fitting locations.
t  The test box -V.A.G 1598/42- is designed so it can be connected both to the wiring harness for the engine control unit and to the engine control unit itself at the same time. The advantage of this is that the electronic engine control system remains fully functional when the test box is connected (for example, for measuring signals when the engine is running).
t  The relevant test procedure will state whether it is necessary to also connect engine control unit to test box.
t  Always use auxiliary measuring set -V.A.G 1527 B- to connect test equipment (e.g. voltage tester -V.A.G 1526 C-, hand-held multimeter -V.A.G 1594 C- etc.).
The engine control unit has to be removed before connectors can be unplugged from engine control unit → Chapter.
  Caution
To prevent damage to electronic components, select appropriate measuring range before connecting measuring leads and observe test requirements.
  A24-0622
–  Connect test box -V.A.G 1598/42- to wiring harness with adapter cable -V.A.G 1598/39-1- or adapter cable -V.A.G 1598/39-2-. Connect earth clip of test box to negative terminal of battery. The instructions for performing the individual tests indicate whether or not the engine control unit itself also needs to be connected to the test box.
–  Carry out test as described in relevant repair procedure.
–  After completing tests re-install engine control unit → Chapter.
–  Interrogate fault memory after re-connecting engine control unit and erase it as necessary → Vehicle diagnostic tester.
  A24-0622

Removing and installing engine control unit - engine codes AVB, AVF and AWX > < Wiring and component check with adapter cable, 121-pinV.A.G 1598/31 (test box) - engine codes AVB, AVF, AWX