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Home >> Volkswagen >> 2003 >> Passat Sedan 4Motion (3B3) W8-4.0L (BDP) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Service and Repair >> With Generic Scan Tool
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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:
- Connect diagnostic tester.
- Switch ignition on.
- Under address word 33, select "Diagnostic mode 9: vehicle information".
- Select the vehicle information "Test-ID 04: Calibration Identification".
Control module identification will be indicated,
e.g.: 07D906018AQ 4997

- End diagnostic and switch ignition off.







- Remove securing screws at cover of protective housing for control modules -arrows-and remove cover.







- Using a screwdriver, carefully pry off retaining bracket (arrow).
- Then disengage connector from control module and disconnect.
- Remove old control module and insert new one.
- Check whether the new control module identification matches the old control module identification.
- Generate readiness code.