LOCATION OF TRANSMISSION CONTROL UNIT

Do you mean ECUs? If so, think they are still (on the M) either side of the plenums, Bosch (5.2s?). You having problems? Sometimes water corrosion on the pins can be an issue.


Ahhhh you mean the Transmission Control Unit, Doh sorry!!!

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Lift the trunk carpet etc and open the gearbox access panel, you should see it there.


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Did you get this sorted?


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Sorry, are you saying you removed the inspection plate/cover in the trunk - under the carpet etc and when you looked at the gearbox through the inspection ‘access window’ you couldn’t see the TCU ? Or are you saying you didn’t find the TCU in the trunk?

The latter I’d understand, the former I am surprised! Have you been through the parts diagrams and spoken with FNA?


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Perhaps email this guy!

https://m.ebay.co.uk/itm/Ferrari-456-GTA-172776-172777-TCU-ECU-Transmission-Control-Unit-Module-Repairs-/273363702883

Or speak to Ricardo... (or FNA).


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Post this in the 456 section. Taz probably knows. I can look through the WSM

 

Yeah surprised. I only know the type from an ex colleague, who I was sure had a TCU issue and moaned about having to strip the boot out for a panel - hence my answer. I’m dealing with Marannelo Uk today for a part - I’ll see if they can help.... I’d have thought the Ebay guy who rebuilds them should be helpful. Can’t believe Riciardo can’t say LOL - what kind of confidential agreement is that!?!? Oddly I did use FNA once for some info to track down the last known part in a dealer network, we’re really great - but maybe because I was from the UK and so it was a bit novel for them!


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Dave,

Quick info from Marannelo is centre console by selector. They are Sending a diagram - may just be parts. Will update if I find anything more.


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IGNORE my last!! Turns out they sent through for a 458!!!!

So I spoke with a couple of places today regarding my Q.V. no one got back to me, not so great. But the two independents I spoke with first thought the TCU was via the inspection panel and sat on/near the gearbox.

Maranello, unfortunately, misunderstood and came back with 458 information. I did email once I got the workshop manual detail they kindly sent, so if I do get any info I’ll post.



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TCUs are almost ALWAYS in "close" proximity to the gearbox...This IS a transaxle car AFIK, ergo, the unit SHOULD be back there no more than 3-4 feet(cable length) from the sensor/plugs/connectors to the ECU boot head...its gotta be close by...work backwards in the harness....that's how I've done this sort of thng in the past sans info...