Wiring and Component Check on Engine Control Module with Test Box VAG1598/31 Audi TT 8N

Special tools and equipment required

Scheme 47

1. Test box V.A.G 1598/31

Note. The test box VAG1598/31 is designed in such a way to be connected simultaneously to the engine control module wiring harness and to the engine control module. This has the advantage 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). Whether the engine control module has to be connected to the test box or not is described in the respective test procedures. Always use adapter set V.A.G 1594 A to connect test equipment (e.g. voltage tester - V.A.G 1527 B, multimeter V.A.G 1526 A, etc.).

Work sequence

1. Remove engine control module. Refer to «Engine control module, removing and installing»(ref-276275-S18031642152008010300000) .

Note. If the test box V.A.G 1598/31 only needs to be attached to the 81-pin connector, the protective housing for the engine control module does not need to be removed

Scheme 48

1. Connect VAG1598/31 test box to connectors of wiring harness.
2. Connect Ground clamp on test box to Ground (arrow).

Note. Whether or not the engine control module has to be connected to the test box is described in the respective test procedures.

1. Perform test as described in relevant repair procedures.
2. After completing test, reinstall engine control module. Refer to «Engine control module, removing and installing»(ref-276275-S18031642152008010300000) .