Wiring and Component Testing Using VAG1598/31 Test Box

Electrical Testing Using VAG 1598/31 Test Box

NOTE: If the Engine Control Module (ECM) is equipped with a metal anti-theft housing (for theft prevention), the metal anti-theft housing must be removed from the ECM to connect the test box. After repairs are complete, the metal anti-theft housing must be reinstalled.







- The test box VAG 1598/31 is designed in such a way that it can be connected simultaneously to the Engine Control Module wiring harness and to the Engine Control Module itself.
- 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).
- Relevant test procedures note if Engine Control Module (ECM) should also be connected to the test box or not.
- Always use VAG 1594A connector test kit to attach measurement devices (e.g. VAG1527B voltage tester, VAG1526 multimeter etc.).

Procedure

- Switch ignition off.
- Remove Engine Control Module (ECM).







- Connect VAG 1598/31 test box to connector of wiring harness. Ground (GND) clip at test box must be clipped to battery Ground. Connect VAG 1598/31 test box to connectors of wiring harness.
- Relevant test procedures note if Engine Control Module (ECM) should also be connected to test box.
- Perform test as described in appropriate repair procedures.

NOTE:
- Important notes after re-connecting Engine Control Module (ECM):
- Check DTC memory and erase, if necessary.
- Generate readiness code. Readiness Code, Generating