A8 Quattro Sedan V8-4.2L (BVJ) (2008)
Engine Control Module: Service and Repair
Engine Control Module
Special tools, testers and auxiliary items required
‹› Hot air gun (VAS 1978/14) - 1 - with nozzle attachment - 2 - from the wiring harness repair kit (VAS 1978A)
‹› Locking pliers - 3 - (commercially available)
‹› The Engine Control Module (ECM) - 1 - is bolted to a protective housing - 5 -. To make removing the shear bolts - 4 - for the retaining tabs - 2 -
more difficult, the threads are coated with locking compound.
‹› To disconnect the electrical connectors from the ECM (for example, to connect the test box or to replace the ECM), the protective housing must be
removed.
Removing
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If the ECM s replaced, in "Guided Fault Finding" select "Replace Engine Control Module" to vehicle diagnosis, testing and information system
(VAS 5051B).
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Turn the ignition and remove the ignition key.
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Remove right cover from the plenum chamber.
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Remove the ECM by removing the bolts - arrows -.