Wiring and Component Testing With Test Box 105 Pin (V.A.G 1598/42), Through MY 10

Wiring and Component Testing with Test Box 105 Pin (V.A.G 1598/42), through MY 10

Special tools, testers and auxiliary items required

• Adapter Cable (V.A.G 1598/39-1)

• Adapter Cable (V.A.G 1598/39-2)

• Test Box 105 Pin (V.A.G 1598/42)

• Individuals with pacemakers should not bend over the engine compartment when the engine is running because the injectors are powered with high voltage.

• The (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 smaller of the two connectors on the ECM is assigned with terminals 1 to 60. The larger of the two connectors is assigned with terminals 1 to 94.






• 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 (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 (V.A.G 1598/42) is designed so that it can be connected simultaneously to the ECM harness and the ECM itself.

• This is advantageous because electronic engine control remains fully functional (for example measurement of signals with engine running) when the test box is attached.

• The procedures will indicate whether the ECM is to remain connected to the test box or not.

To avoid damaging electronic components, switch to the corresponding measuring range and observe all test conditions before connecting the test leads.

- Remove the ECM. Refer to => [ Engine Control Module (J623) ] Service and Repair.

- Connect (V.A.G 1598/42) to wiring harness with (V.A.G 1598/39-1) or (V.A.G 1598/39-2). Clamp test box Ground (GND) clip to battery negative terminal. The procedure will indicate whether the ECM is to be connected to the test box or not.

- Perform test as described in relevant repair sequences.

Installing the ECM

Install in reverse order of removal.

- Thereafter, the ECM must be equipped with the protective housing.

- Clean threaded holes for shear bolts of locking compound residue. Cleaning can be performed with a thread cutter (tap).

- Always use new shear bolts.

- Check the DTC memory and erase if necessary. The readiness code must be generated in the ECM if the Diagnostic Trouble Code (DTC) memory was erased. Use a vehicle diagnosis tester.

• When ending Guided Fault-Finding, the tester attempts to erase the DTC memory of all control modules. If this is not successful, the remaining DTCs stored in memory must be corrected until all DTCs can be erased.