[mrgrime]

Hi, I am a member of the Rossion owners club. Rossion is no longer in business and we have been attempting to create clones of the original EECV that was sold with the cars. We knew that the original EECVs were heavily modified from a programing perspective, however, upon closer inspection we discovered the the circuit boards have also been modified. Below is a picture of the modifications we discovered. The left side is the EECV in the car and the right side is a bone stock EECV from a 04 Escape which was the EEC used in the Rossion. Would anyone have an idea what these modifications were for? And also, would anyone have an idea who would have had the knowledge of how to modify the board? The person doing this would have done this in the 2009 time frame. Thanks

IMG_2720.JPG (195.64 KiB) Viewed 19274 times

[jsa]

Looks likes components were added to use spare IO channels.

It's typical for the boards to be built for multiple applications and fitted with only the components needed for each specific application.

The unpopulated parts of the board can have the parts added and code changed to suit.

There is likely an EEC out there with the parts already in place but might have other parts left off.

Looking at EEC wiring pinout differences may reveal what was changed. Likewise disassembling the BIN from both.

[mrgrime]

Thank you for this insight. Based on this it now makes sense. It appears the tach signal was moved to an unused pinout in order to feed an aftermarket tachometer.

[sailorbob]

See this post for this modification to enable the tachometer output on pin #48.

https://eectuning.org/forums/viewtopic.php?f=1&t=24027