S5 Quattro Coupe V8-4.2L (CAUA) (2009)
Engine Control Module: Service and Repair
Engine Control Module
Engine Control Module
Special tools, testers and auxiliary items required
‹› Wiring Harness Repair Kit (VAS 1978A)
‹› A small commercially available pliers
‹› Some engine control modules are not equipped with a protective housing. A protective housing is not installed in vehicles with automatic
transmissions.
‹› 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.
‹› The protective housing must be removed to disconnect the connectors from the engine control module.
Removing
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If the engine control module is replaced, select "Guided Functions " on the Vehicle Diagnosis, Testing and Information System (VAS 5051B) and
then "Replace engine control module ".
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Turn the ignition and remove the ignition key.
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Pull the plenum chamber cover rubber seal in front of the nut - 1 - slightly.