volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Engine Control Module (ECM) J623 Secured With Anti-Theft Immobilizer, Removing and Installing|Page 5293 > < Engine Control Module (ECM) J623 Secured With Anti-Theft Immobilizer, Removing and Installing|Page 5291
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Saw off two rounded sides of the shear bolt heads so that two flat parallel surfaces result -arrows-.

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Using locking pliers, remove the shear bolts. Discard the shear bolts.

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Insert a screwdriver -A- between the protective housing and the retaining plate - arrow

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Using a screwdriver -A-, pry the protective housing upward and sideways to remove from the retaining plate -arrow-.

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Disconnect the forward electrical harness connector -1 -

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Lift up the locking mechanism -2- slightly.

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Remove the Motronic Engine Control Module (ECM) J623 from the retainer -arrow-.

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Disconnect the rear electrical harness connector.

Installation 
Installation is performed in reverse order of removal. Note the following:
The Motronic Engine Control Module (ECM) J623 must be installed with the protective housing.

Engine Control Module (ECM) J623 Secured With Anti-Theft Immobilizer, Removing and Installing|Page 5293 > < Engine Control Module (ECM) J623 Secured With Anti-Theft Immobilizer, Removing and Installing|Page 5291