Wiring and Component Testing Using VAG1598/31 Test Box

Wiring And Component Check Using Test Box VAG 1598/31

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.
- Test box VAG 1598/31 is designed so that it can be connected to the wiring harness for the engine control module and to the engine control module itself at the same time.
- This has the advantage of enabling the engine management system to remain fully operational even with the test box connected (for example, when testing signals while the engine is running).
- The instructions for performing the individual tests indicate whether or not the engine control module itself also needs to be connected to the test box.
- Always use adapter set VAG 1594A to connect test equipment (e.g. voltage tester VAG 1527B, voltage tester VAG 1526A etc.).

WARNING: To prevent damage to the electronic components, switch to the respective measuring range before connecting the measuring cable and observe the test prerequisites.

Special tools and equipment







- VAG 1598/31

Work sequence
- Switch off ignition.
- Remove engine control module .







- Connect test box VAG 1598/31 to wiring harness connectors (do not connect engine control module). Connect Ground clamp on test box to Ground -arrow-. The respective test sequences indicate whether the engine control module itself also needs to be connected to the test box.
- Carry out test as described in the repair instructions.

NOTE: After reconnecting the engine control module the following operations must be performed:
- Perform adaption of throttle valve control module -J338-.
- Check and if necessary erase the Diagnostic Trouble Code (DTC) memory.
- If the Diagnostic Trouble Code (DTC) memory was erased, generate the readiness code. Readiness Code, Generating