Jetta SportWagen L5-2.5L (CBUA) (2009)
Engine Control Module: Service and Repair
Motronic Engine Control Module, Replacing
Motronic Engine Control Module, Replacing
Engine Control Module (ECM) without Anti-Theft Immobilizer, Removing and Installing
‹› When the Motronic Engine Control Module (ECM) (J623) electrical harness connectors are disconnected, the adaptation values are erased and the
DTC memory content remains intact.
Test procedure
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Perform a preliminary check to verify the customers complaint. Refer to --> [ Preliminary Check ] See: Powertrain Management/Computers and
Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Preliminary Check
Start diagnosis
Check the identification of the previous Motronic Engine Control Module (ECM) (J623) as follows:
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Connect the scan tool.
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Switch the ignition on.
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Using the scan tool, select "Vehicle information".
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Select " Calibration Identification" in vehicle information.
The electronic control module identification number will be displayed, e.g.: 06A906032NA 4983
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Record the electronic control module identification number.
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Switch the ignition off.
Procedure
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Switch off ignition.
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Remove wiper arms and plenum chamber cover.
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Remove plenum chamber bulkhead.
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Disengage forward harness connector- 1 - from Engine Control Module (ECM) and disconnect it.
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Pry up locking mechanism- 2 - slightly.
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Then slide Engine Control Module (ECM) out of retainer -arrow-.