volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Engine Speed Sensor > < Engine Control Module (ECM) J623 Secured With Anti-Theft Immobilizer, Removing and Installing|Page 5292
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Use New shear bolts when installing the Motronic Engine Control Module (ECM) J623. 

Motronic Engine Control Module (ECM) J623 reprogramming 

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The new Engine Control Module (ECM) J623 and immobilizer must be activated.

Final procedures 
After the repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory. See: Testing and Inspection/Scan Tool Testing and Procedures/Diagnostic Mode 03: Interrogating Fault Memory
2. If necessary, erase the DTC memory. See: Testing and Inspection/Scan Tool Testing and Procedures/Diagnostic Mode 04: Reset/Delete

Diagnostic Data

3. If the DTC memory was erased, generate readiness code.

Engine Speed Sensor > < Engine Control Module (ECM) J623 Secured With Anti-Theft Immobilizer, Removing and Installing|Page 5292