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Don't try it yourself! (long) (archive)

[ Follow Ups ] [ E36 M3 Message Board ] [ Msg. Board FAQ ]

Posted by Ken ///M3 on January 30, 2001 at 12:51:02:

In Reply to: Re: My factory chip seems to be soldered?? 95 M3 posted by Brian C on January 30, 2001 at 11:46:51:

Most of these were soldered in at the factory so we couldn't "play" with the programming easily. This is the reason many of the M3 pilots on this board had to disconnect their ECU and send it to a professional reprogrammer who has the tools and skills.

The "chip" in question has 28 pins, divided into two 14 pin rows. The pins are spaced exactly 1/10 inch apart and there is solder on both sides of each plated-through hole. It takes (as mentioned in a previous post) a very small tip iron at a controlled temp and a method for removing the solder without damaging the board. Then the new chip is inserted (correctly) and resoldering begins. This is not a job for an amateur and the damage risks are very high. New ECU are very expensive. BTW, I worked as a NASA-trained computer tech for many years.

My advice, unless you're experienced with this technology and have the tools and skills, send it out.

(BTW, the OBDII cars have flash memory that can be erased and reprogrammed by devices like Jim C's Shark Injector).

Ken


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