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VVDI Key Tool Plus Program Citroen Jumper 2021 95640 All Keys Lost

 Losing all keys to your Citroën Jumper 2021 can be a frustrating experience, but with the right tools and knowledge, it’s possible to program a new key. Below is a step-by-step guide based on a real-world procedure performed by an automotive locksmith.

 

Tools and Equipment Required

  • VVDI Key Tool Plus – Necessary for direct key programming.
  • EEPROM adapter – Used to read and write data from the immobilizer chip.
  • Soldering equipment – For carefully removing and reinstalling the chip.

 

 

Step-by-Step Procedure

1. Accessing the Immobilizer Module

  • The immobilizer module in the Citroën Jumper 2021 is located behind the dashboard.
  • Carefully remove the casing by releasing the side and top clips to avoid damaging the connectors.

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2. Removing and Reading the EEPROM Chip

  • Locate the EEPROM chip (95640) on the immobilizer board.
  • Desolder the chip gently to avoid damaging the circuit board.
  • Solder the chip onto an EEPROM adapter to read its data.

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3. Extracting Key Data and PIN

  • Identify the stored key data and extract the vehicle’s PIN code.
  • The dump revealed two existing keys, but the goal was to program four new keys.

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4. Writing Key with vvdi key tool plus

  • Prepare new key transponder chips by writing the extracted PIN and new key data.
  • Each key was programmed sequentially, with the fourth key added to the immobilizer’s memory.
  • Verify that all four keys were successfully written before proceeding.
  • Save new key data

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5. Write new key data back to EEPROM

  • Write the new key data back to eeprom.

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6. Testing the New Keys

  • Solder the EEPROM chip back onto the immobilizer board.
  • Reassemble the module and reconnect it to the vehicle.
  • Repeat the test with the second, third, and fourth keys to ensure all work correctly.

 

Done.

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