Scan Tool Testing

Wiring And Component Check On Engine Control Module With Test Box VAG 1598/31

Special tools and equipment required







- 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
- Remove engine control module.

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







- Connect VAG1598/31 test box to connectors of wiring harness.
- 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.

CAUTION: To prevent damage to the electronic components, select appropriate measuring range before connecting the measuring cables and observe the test requirements.

- Perform test as described in relevant repair procedures.
- After completing test, reinstall engine control module.