Test Box, Connecting For Wiring Test

Test Box For Wiring Test, Connecting

NOTE:
- VAG1598/31 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 VAG1594A connector test kit to attach measurement devices (e.g. VAG1527B voltage tester, VAG1526 multimeter etc.).

Special Tools and Equipment







- VAG1598/31

Procedure
- Switch ignition off.
- Pull rubber seal toward front and remove.
- Remove plenum chamber cover toward front.
- Remove cover for E-box, plenum chamber.







- Using a screwdriver, carefully pry off retaining bracket (arrow).
- Disengage locking lugs and remove control module connector.

CAUTION: To avoid damaging electronic components, set measuring range before connecting test leads and observe all test requirements.







- Connect VAG1598/31 test box to connector of wiring harness. Ground (GND) clip at test box must be clipped to battery minus. 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):
- Generate readiness code. Readiness Code, Generating

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