Engine Control Module (ECM), removing and installing: Notes

Special tools, testers and auxiliary items required

Fig 1: Heat Gun, Adapter Nozzle And Pliers

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Heat Gun 220 V/50 Hz VAS 1978/14 - 1 - with nozzle attachment - 2 - from Wiring Harness Repair kit VAS 1978A
Locking pliers - 3 - (commercially available)

Fig 2: Removing Protective Housing From Engine Control Module (ECM) J623

Courtesy of VOLKSWAGEN UNITED STATES, INC.

NOTE:

The Engine Control Module (ECM) - 1 - is bolted to a protective housing - 5 -. To make removal of shear bolts - 4 - for retaining tabs - 2 - more difficult, the threads are coated with locking compound.
To disconnect the connectors from the engine control module (ECM) (e.g. to connect the test box or to replace the ECM), the protective housing must be removed.