Wiring and Component Check With Test Box VAG 1598/31

Wiring and Component Check with Test Box VAG 1598/31

• The test box (VAG1598/31) is designed in such a way to be connected simultaneously to the engine control module wiring harness and to the engine control module.





• This has the advantage that the electronic motor control system remains fully functional when the test box is connected (for example, for measuring signals when the engine is running).

• Whether the engine control module has to be connected to the test box or not is described in the respective test procedures.

- Switch ignition off.

- Remove engine control module:

• With anti-theft housing. Refer to => [ Engine Control Module with Metal Anti-Theft Housing ] Engine Control Module With Metal Anti-Theft Housing.

• Without anti-theft housing. Refer to => [ Engine Control Module without Metal Anti-Theft Housing ] Engine Control Module Without Metal Anti-Theft Housing.

- Connect test box (VAG1598/31) to connectors of wiring harness. Connect Ground clamp on test box (not shown in illustration) to vehicle Ground. Whether or not engine control module has to be connected to test box is described in respective test procedures.





CAUTION!
To prevent damage to the electronic components, select appropriate measuring range before connecting the measuring cables and observe the test requirements.

• After reinstalling the engine control module the following operations must be performed:

- Checking of Diagnostic Trouble Code (DTC) memory and erase, if necessary. Refer to => [ DTC Memory, Checking ] DTC Memory, Checking.

- If DTC memory has been erased, readiness code must be regenerated. Refer to => [ Readiness Code, Generating ] Readiness Code, Generating.