Wiring and Components, Checking with Test Box

Wiring and Components, Checking with Test Box

Special tools, testers and auxiliary items required

• Adapter Cable, 121-Pin (V.A.G 1598/31) (test box)

• The (V.A.G 1598/31) (test box) is designed so that it can be connected to ECM wiring harness and ECM itself at the same time.

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

• Respective test procedures note whether Engine Control Module (ECM) must also be connected to the test box.

• To connect measuring instruments (for example voltage tester (V.A.G 1527B), multimeter (V.A.G 1526C) etc.) always use connector test set (V.A.G 1594C).

Procedure

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

- Connect (V.A.G 1598/31) (test box) to multi-pin harness connectors of wiring harness.





- Clamp test box Ground (GND) clip to Ground (GND).

- The procedures will indicate whether the engine control module is to be connected to the test box.

- Perform test as described in the respective repair procedures.

- Install Engine Control Module (ECM) after completing test. Refer to => [ Engine Control Module ] Engine Control Module.