Wire and Component Test Using VAG1598/31 Test Box

Wire And Component Test Using VAG1598/31 Test Box

NOTE:
- The 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 the Engine Control Module (ECM) should also be connected to the test box or not.
- If the Engine Control Module (ECM) is bolted with a protective housing, the protective housing must be separated from the ECM in order to be able to connect the test box. After repair, the Engine Control Module (ECM) must be re-equipped with the protective housing.
- Always use the VAG1594A connector test kit to attach measurement devices (e.g. VAG1527B voltage tester, VAG1526 multimeter etc.).

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

Special tools and equipment







- VAG1598/31 Test box

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







- Connect VAG1598/31 test box to connector of wiring harness. Connect Ground (GND) clip attest box (not visible in illustration) to Ground (GND). Relevant test procedures note whether Engine Control Module (ECM) should also be connected to test box.
- Perform test as described in relevant repair sequence.

NOTE:
After re-connecting the Engine Control Module (ECM), the following work steps must be performed:
- Perform adaptation of the Throttle Valve Control Module -J338-.

- Check the DTC memory and erase it if necessary. Diagnostic Mode 04 - Erase DTC Memory
- If the DTC memory was erased, the readiness code must be generated again. Generate Readiness Code