Wire and Component Test Using VAG 1598/31 Test Box

NOTE:
- VAG 1598/31 test box is designed so that it can be simultaneously connected to the wiring harness at the Engine Control Module (ECM) and also to the ECM itself.
- This is advantageous because electronic engine control remains fully functional (e.g. measurement of signals with engine running) when the test box is attached.
- Relevant test procedures note whether 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. VAG 1527B voltage tester, VAG 1526 multimeter etc.).


Special tools and equipment







- VAG 1598/31


WARNING!
To reduce the risk of damage to electronic components, switch on power to components before connecting test leads and observe test requirements


- Switch ignition off.
- Remove windshield wiper arms (unscrew).
- Disconnect cover for plenum chamber and place it on windshield side.
- Disengage locking lugs and remove control module connector.







- Connect VAG 1598/31 test box to connector of wiring harness. Ground clip (arrow) at test box must be clipped to battery negative terminal. Relevant test procedures note whether Engine Control Module (ECM) should also be connected to the test box.
- Perform test as described in relevant repair sequence.

Perform the following work after re - connecting Engine Control Module (ECM):
- Check DTC memory and erase it if necessary.
- Generate readiness code.

All models


NOTE: In the first adaptation phase during engine Basic Setting, it is possible that the idle will be rough and vehicle may shake slightly in drive mode.