Scan Tool Testing

Wiring And Components, Checking With Test Box 105 Pin V.A.G 1598/42

Special tools, testers and auxiliary items required







- Adapter cable V.A.G 1598/39







- Test box 105 pin V.A.G 1598/42







NOTE:
- The test box 105 pin V.A.G 1598/42 is designed with 105 terminals. It can be connected to the engine control module (ECM) via 2 different adapter cables.
- The engine control module (ECM) is connected to the vehicle electrical harness via a 60-pin connector and a 94-pin connector.
- For testing at the 60-pin harness connection, the adapter cable V.A.G 1598/39-1 is connected to the test box with connector - A -. Components of the 60-pin harness connection.
- For testing at the 94-pin harness connection, the adapter cable V.A.G 1598/39-2 is connected to the test box with connectors - A - and - B -. Components of the 94-pin harness connection.
- The test box V.A.G 1598/42 is designed so that it can be connected simultaneously to the engine control module harness and the engine control module itself. This makes it possible for the electronic engine control to remain fully functional with the test box attached (e.g. measurement of signals with engine running).
- The procedure will indicate whether the engine control module is to remain connected to the test box or not.
- To connect measuring instruments (e.g. voltage tester V.A.G 1527 B, multimeter V.A.G 1526 B etc.) always use connector test set V.A.G 1594 C.

The engine control module (ECM) must be removed to disconnect the ECM harness connectors.

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







- Connect test box V.A.G 1598/42 to wiring harness with adapter cable V.A.G 1598/39-1 or adapter cable V.A.G 1598/39-2. Clamp test box Ground (GND) clip to battery negative terminal. The procedure will indicate whether the engine control module is to be connected to the test box or not.
- Perform the test as described in the corresponding repair procedure.
- After completing the test, install the engine control module (ECM).

After installing Engine Control Module (ECM), the following work steps must be performed:
- Check the DTC memory and, if necessary, erased. After DTC memory is erased, a readiness code must be generated for the engine control module using operating mode "Guided Fault-Finding".