Passat Sedan 4Motion W8-4.0L (BDP) (2002)
Engine Control Module: Service and Repair
With Generic Scan Tool
Replacing Engine Control Module (ECM)
Work procedure
First, check control module identification of the previous Engine Control Module (ECM) as follows:
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Connect diagnostic tester.
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Switch ignition on.
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Under address word 33, select "Diagnostic mode 9: vehicle information".
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Select the vehicle information "Test-ID 04: Calibration Identification".
Control module identification will be indicated,
e.g.: 07D906018AQ 4997
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End diagnostic and switch ignition off.
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Remove securing screws at cover of protective housing for control modules -arrows-and remove cover.
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Using a screwdriver, carefully pry off retaining bracket (arrow).
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Then disengage connector from control module and disconnect.
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Remove old control module and insert new one.
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Check whether the new control module identification matches the old control module identification.
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Generate readiness code.