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How to change EPROM PIN code and VIN number in GM's instrument cluster IPC


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How to change EPROM PIN code and VIN number in GM's instrument cluster IPC

How to manually change the EPROM PIN code and VIN number in an 8-inches Insignia instrument cluster.


This tutorial shows how to change the VIN number and security pin number stored in the IPC EPROM chip.
Tools you will need

  • Soldering iron and solder.
  • A hot air rework station or solder wick for removing the EPROM chip.
  • A chip programming device. I use the GQ-4X Willem Programmer
  • A hex editor. I use Synalyze Pro for Apple Mac

 

The process is very straight forward.

  • Take apart the IPC and remove the circuit board.
  • Remove the 8-pin soic EPROM chip.
  • Place the EPROM chip in the chip programmer.
  • Read the chip and save the chip's .bin file.
  • Open the .bin file in a hex editor.
  • Find the location of the VIN and four-digit PIN code.
  • Change the VIN and PIN code to the ones from your car.
  • Save the edited .bin file. 
  • Use the chip programmer to write the edited .bin file onto the EPROM chip.
  • Solder the EPROM chip back to the circuit board.

 

After doing this, the car's mileage will display correctly on the IPC unit.

You will now be able to program the IPC unit via GM online SPS using your cars original four-digit pin code.
You will receive an IPC DTC error from GDS2, which states "Incorrect Immobilizer Identifier Received"
To eliminate this DTC error, you will need to use GM's online SPS immobilizer learn to delete your car's keys and relearn your car's keys.

There's a much faster method for changing the VIN number in the instrument cluster using GM DPS software.

However if you want to change the four-digit PIN code the cheap way, you will need to remove the EPROM chip to do it.

This process can also be used to change the VIN and PIN in the BCM module and the four inch IPC EPROM chip.

 

 

VIN number location in the hex editor.

Screenshot 2021-03-21 at 9.52.09 pm.png

 

 

Four-digit PIN code number location in the hex editor.

Screenshot 2021-03-21 at 9.52.54 pm.png

 

 

Circuit Board.

How to change EPROM PIN code and VIN number in GM's instrument cluster IPCHow to change EPROM PIN code and VIN number in GM's instrument cluster IPCHow to change EPROM PIN code and VIN number in GM's instrument cluster IPCHow to change EPROM PIN code and VIN number in GM's instrument cluster IPCHow to change EPROM PIN code and VIN number in GM's instrument cluster IPCHow to change EPROM PIN code and VIN number in GM's instrument cluster IPC


Troy

About The Author

Troy is a professional Artist, Photographer, Videographer, Musician and Creator with a love for arts, electronics, coding, traveling, taking photos and creating internet content. He is also the founder of CameraLoops.com



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1 hour ago, Jesus Ruben Molina Garcia said:

Hi Troy, is possible to change pin code with GM DPS? 
 

or the pin code only can be change with reading and modify  eprom?

 

 

Not that I know of. Maybe it's possible with DPS but I don't know.

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