Fiat punto immobiliser

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=71694
Printed Date: August 16, 2025 at 11:35 AM

Topic: Fiat punto immobiliser

Posted By: delambo
Subject: Fiat punto immobiliser
Date Posted: January 28, 2006 at 5:42 PM

I have a customer with a punto of very little value with a factory immobiliser problem. It is not worth spending money on performing a proper repair so I have agreed to remove the immobiliser. Only problem is I cand sus out how now! I have read the 27c512 on the main board, and all I need is for someone to point me in the right direction as to which line to modify and what to modify it to.

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If it seems too good to be true, it probably is

Replies:

Posted By: Powermyster
Date Posted: January 28, 2006 at 7:45 PM

what year is the car and what exactly are you try ing to do. teh newer 99 on puntos are a pain in the ass

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Why oh Why didn't i take the blue pill
Darren Power

Posted By: delambo
Date Posted: January 29, 2006 at 5:07 PM

Powermyster wrote:

what year is the car and what exactly are you try ing to do. teh newer 99 on puntos are a pain in the ass

Its a '96 punto 55 (1.1) with marelli ECU. The car doesnt currently start and the immobiliser light is on the dash board. I have read the "software" off the eprom on the ECU, and was planning on "editing " it to remove the immobiliser. (Unless someone else knows a better way of removing the immobiliser)

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If it seems too good to be true, it probably is

Posted By: Powermyster
Date Posted: January 29, 2006 at 6:27 PM

a new key code ecu is about £50stg and comes blank with no keys written to it. as far as i remember this gets the job done. i can find out for sure i you want. i work for fiat.

but if you can read the eeprom you can save yourself any cost providing your binary is up to scratch.

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Why oh Why didn't i take the blue pill
Darren Power

Posted By: delambo
Date Posted: January 30, 2006 at 12:41 PM

When you say the immobiliser ECU do you mean the code block that sits above the fusebox above the fuse box? The eprom I have read is on the main ECU, I believe it gets a signal from another eeprom on the board which I believe is read protected but I understand I can edit the main "engine management" eprom and edit it so it will run without the signal from the immobiliser eeprom. I should think it would be possible also by soldering jumper wires on the the pcb, but I couldnt sus out where they would need to go.

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If it seems too good to be true, it probably is

Posted By: Powermyster
Date Posted: January 30, 2006 at 12:45 PM

yes the code box.. if your can reprogram the eeprom on the ecu that should in theory work. i would try it after all the car is inexpensive.

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Why oh Why didn't i take the blue pill
Darren Power