LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Volkswagen >> 2004 >> Golf (1J1) L4-2.0L (AVH) >> 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
April 5, 2026: LEMON Manuals is launched! Read the announcement.

With Generic Scan Tool



Replacing Engine Control Module (ECM)

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.: 06A906032MC4622
- End diagnosis and switch ignition off.
- Remove wiper arms and wind cowl.
- Disengage connector from control module and then disconnect it.







- Press mounting bracket (arrow) towards left and pull control module out.
- Insert the new control module into the bracket.
- Install connector from control module and engage.
- Check whether the new control module identification matches the old control module identification.
- Generate readiness code.