Wiring and Component Testing Using VAG1598/31 Test Box

Wire And Component Testing Using VAG1598/31 Test Box


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.).


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


Special Tools and Equipment







- VAG1598/31

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







- Connect VAG1598/31 test box to connector of wiring harness. Connect Ground (GND) clip at test box (not visible in illustration) to Ground (GND). 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.

Procedure Following Interruption Of Voltage Supply

After re-connecting the Engine Control Module (ECM), the following work steps must be performed:

- Activate Engine Control Module (ECM) in "Guided Troubleshooting" below diagnostic object "Engine Control Module (ECM), replacing".