Jetta L4-2.0L (AZG) (2004)
Engine Control Module: Service and Repair
With Generic Scan Tool
Replacing Engine Control Module (ECM)
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.: 06A906032MC4622
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End diagnosis and switch ignition off.
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Remove wiper arms and wind cowl.
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Disengage connector from control module and then disconnect it.
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Press mounting bracket (arrow) towards left and pull control module out.
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Insert the new control module into the bracket.
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Install connector from control module and engage.
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Check whether the new control module identification matches the old control module identification.
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Generate readiness code.