Test Box, Connecting For Wiring Test

Test box, connecting for wiring test

Recommended special tools and equipment e.g.:
Vehicles with 80-pin Engine Control Module (ECM, engine code AHA)
Vehicles with 80-pin Engine Control Module (ECM)




- VAG1598/22 Adapter (68-pin)

Vehicles with 121-pin Engine Control Module (ECM, engine code ATQ)




- VAG1598/31 Adapter cable (121-point)

Requirement
- Ignition switched off.

Procedure




- Remove securing screws at cover of protective housing for control modules -arrows-and remove cover.






- Using a screwdriver, carefully pry off retaining bracket (arrow).
- Then disengage connector from control module and disconnect.

Vehicles with 80-pin Engine Control Module (ECM, engine code AHA)





- Connect VAG1598/22 adapter (68-pin) to control module wiring harness.

Vehicles with 121-pin Engine Control Module (ECM, engine code ATQ)





- Connect VAG1598/31 adapter cable (121-point) at control module wiring harness. Engine Control Module (ECM) is not connected.

Continuation for all vehicles
When harness connectors are disconnected from the Engine Control Module (ECM) or the battery is disconnected, all adaptation values in the control module are erased. DTC memory content will remain intact however. If the engine is started after this, a rough, uneven idle can result. In this case, the readiness code must be generated again. Monitors, Trips, Drive Cycles and Readiness Codes