456 GTA door window ECU thoughts on Maserati 3200 ECU fitting

Call Rod Drew at FAI in Costa Mesa. He rebuilds a wide variety of Ferrari electronic control units.

 

There is a part interchange on this forum. If you find out the maser unit works post which maser part number for other 456 owners. Sometimes we have to experiment to find amazing success and pass on to others. On the 348's the Ferrari crank sensors were garbage. We changed them all the time. We swapped them for KIA sensors and those never failed. In fact I bought 12 of them super cheap and put 2 in my friend's 348 and 2 in my 550 over 10 years ago. I still have 8 new Kia sensors. I may never use them all up.

 

Did you try the Maserati ecu yet? The 456 ecus and hard to find!

 

It probably will work - I've switched across different part numbers for this unit between 360-430 and 360-4200.

 

Are you looking for a part for the 456 or the 456M?

I can't see how the Maserati unit would work on the 456GT/GTA (P/N 153096). There are two units on the 456GT/GTA and they are located in the doors (controlling only one side). The Maserati 3200 unit is in the footwell and there is only one of them, controlling both sides.

 

Here's a shot of the internals of the 456 Window ECU (thanks to @franschman )

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It might be interesting to compare the internals of the Maserati unit.

I believe the 456GT/GTA Window ECU controls the doorlock stuff, too (probably the reason why there are two sets of different relays in there). The doorlocking function is handled by a separate unit on the 456M and Maserati.

I'm guessing the Maserati unit has 4 identical (window) relays and no doorlock relays.

 

The system looks simple, wouldn't it be possible to fix it? With a bit of luck, the relays are shot, which is not an horrendous fix.

 

That's just one side of the board. There are dozens of components on the other side.

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There are 15 pages in the manual describing window and doorlock operation. Simple it is not. Taking it to a dealer with an SD-1 tool sounds like an easier option. We don't even have a pinout for the Window/Doorlock ECUs on a 456.

I don't know what basic faultfinding has been done already. Have the fuses been checked? Has power been put on the window motors directly?

 

Thanks for the backside photo.

On the upside, except from the Motorola chip, all the components are soldered "through the hole" (sorry for the so-so english) . These are a easy to replace...

I had not seen the backside that is another story... The board is made out of early SMD components (from the 90's) that were quite unreliable, but still possible to replace.

If the Motorola chip is toast, no easy way to fix it as even if you could source one, and solder it, you would still have to program it.

As long as the chip is fine, an audio repairman should be in a position to fix the board (?). This would be a somewhat easier approach than adapting the Maserati board, which is probably programmed specifically.

 

Any luck with the ECU repair as I have a faulty ECU. Swap them side to side and the issue follows, so it's not wiring or micro switches.