Today, we’ll demonstrate how to disable the immobilizer system on a 2006 Volkswagen Jetta TDI using CarProg software. We’ll start by removing the ECU from under the windshield cowling, then open it to extract the EEPROM chip. Using CarProg and EDC 16 software, we’ll reprogram the immobilizer data on the EEPROM chip. After reattaching the chip to the ECU, we’ll reinstall the ECU in the vehicle, effectively turning off the immobilizer.
Steps Involved
Step 1: Removing the ECU
- Location: The ECU (Engine Control Unit) is located under the cowling of the windshield on the 2006 Volkswagen Jetta TDI.
- Process: Begin by safely removing the ECU from the vehicle to access its internal components.
Step 2: Accessing the EEPROM Chip
- Opening the ECU: Carefully open the ECU casing to access the internal components. This may require heat or other means to delaminate the backing cover from the ECU.
- Removing the EEPROM Chip: Identify and gently remove the EEPROM (Electrically Erasable Programmable Read-Only Memory) chip. This chip stores the data for the immobilizer system among other functions.
Step 3: Reprogramming the EEPROM Chip
- Using CarProg Software: Connect the removed EEPROM chip to the CarProg Device using the appropriate adapter (A6). The CarProg tool is designed for car electronic repair and is commonly used for adjusting odometer readings, repairing airbag modules, etc.
- Reading the EEPROM: The CarProg software will read the data stored on the EEPROM chip. Use the EEPROM section of the software. Don’t forget to set your chip type before reading and before programming.
- Recoding with EDC 16 Software: Utilize EDC 16 software, which is specific to handling engine control units like those in VW group vehicles, to modify the immobilizer data on the EEPROM.
Step 4: Reinstalling the EEPROM and ECU
- Re-attaching the EEPROM Chip: After reprogramming, carefully reattach the EEPROM chip to the ECU motherboard ensuring proper alignment and secure connections.
- Reinstalling the ECU: Place the ECU back into its original position under the cowling and ensure it is properly connected and secured.
Final Outcome
- Disabling the Immobilizer: The modifications made to the EEPROM will disable the immobilizer deactivation feature on the ECU. This means the vehicle will no longer require the original immobilizer code from the car’s key fob to start, effectively bypassing this security feature.
Considerations
- Legality and Risks: It’s important to note that modifying or bypassing the immobilizer system may have legal implications and could potentially affect the security of the vehicle. It is advised to undertake such modifications only for legitimate purposes and to understand the risks involved.
- Technical Skill: This process requires a considerable amount of technical skill and familiarity with car electronics and should only be performed by someone experienced in this field or under professional supervision.
