S4 Quattro Wagon V8-4.2L (BHF) (2008)
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Grasp head of bolt - 2 - with locking pliers - 1 - and screw out shear bolt in direction of - arrow -.
Engine control module can now be separated from protective enclosure.
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Release connectors of engine control module and disconnect.
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Take out old engine control module and insert new one.
Installing engine control module
Install in reverse order of removal; protective enclosure is always to be reinstalled to engine control module. New shear bolts must be used.
The following operations must be performed after installing the engine control module:
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Adapt immobilizer to: Motronic Engine Control Module (ECM) (J220) (otherwise vehicle will not start).
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Encode new engine control module.
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If vehicle is installed with cruise control system (can be seen from steering column switch), this must be released in engine control module.
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Check Diagnostic Trouble Code (DTC) memory and erase, if necessary.
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Activate engine control module in "Guided Fault-Finding" routine under diagnosis item "Replacing engine control module".
Vehicle diagnostic, testing and information system VAS 5051 is to be used for this purpose.