General Ducato 3.0 multijet 160 comformatic fix selespeed magnetti

[Seanwinder22]

I wanted to post my feedback and finding on my issue I faced and fixed with my comfortmatic gear box but wanted to say this worked for me I’m not saying it’s everyone’s issue yours could be a different contact or sensor but still my findings point to the harness or contacts

I had the No transmission fault no gears available check handbook …. So I’ve owned a comfortmatic years and knew about these issues from a friend and others that have faced similar issues

Many talks with Fiat and commercial truckers garages and iveco or promaster threads etc I really dived into these issues on many cases and was told this that 98% of issues relating no transmission was the harness or contacts or electric fault
Very few cases gear box removed or clutch and still may have not been that but was changed anyway
In hopes
I first got this so know first hand garages do say new gear box / clutch and try the expensive changes first it seems working through parts ticking off a list …. Not all but most garage. I was lucky in away having helped a friend have sensor issues regarding this m40 gear box so it’s the first I tried

What I did while vehicle was running well the AA guy did after I told him
Was he moved the selespeed harness while engine running which we heard a clink no more beeping no transmission on dash
Moved it again it came back in the dash

On the rear of the gear box easy through battery tray when battery removed to get to unplug the 4 in question, you will see on this harness evo 0.1.2.3 mine was the contact on the gear engagement it was broken and a short was happening so I removed the harness completely stripped the plug and purchased the new one from te connectivity job complete

A year later it happens again slowly approaching a roundabout parked up got under unplugged and cleaned with contact cleaner all good
Got me home this time was the actual sensor

My point is the leaks these Ducatos have especially if a old ish van 2006 to 2010 scuttle leaks etc dropping on the gear box corroding sensors and contacts issue after issue
Only using the van a few months out the year is very bad for this also

Get the scuttle tray sorted first
Get the harness taped up nice and clamp down to stop movement this also weekens contacts or brakes
Get wiring around headlight
Earth strap
My 3.0 also the starter battery was only 95ah I changed to 110ah big difference
Cleaned all contacts on plugs then filled them with electrical snot forgot the name to stop any issues getting in
I bled the small reservoir very old fluid filled with patronas dot 4
Changed hydraulic fluid rectangle reservoir filled with new patronas cs speed 75w
Dropped gear box oil 2.9 filled with new patronas transmission geartech 75w-85
Cleaned brake switch
It’s now running brilliantly had no issues at all
But to keep on top of this I will clean the harness contacts every year because they was badly corroded first one was damaged

I may even look into the relearn after changing the clutch speed sensor I didn’t do anything with the smart/plus or multiscan just disconnected the battery before any work carried out
Just reading up now on the gearbox update and relearn procedure
Anything to try get this sorted for good

But I’ve not owned the van from new so you don’t know how long leaks have gone on for etc so corrosion had already started on the harness contacts
So I suspect on the gear box side of sensors or female plugs would have been the same so clean both it’s a time consuming job so glad I did this myself

 

[jackwhoo]

This is really serendipitous for another member who is looking for a solenoid id for the odd numbered gears , ev1?

 

[jackwhoo]

@dagbj

Looks like this thread will be of great help to you

 

[dagbj]

Hi thanks,, my biggest challenge is that the car is in France and i'm back in Norway.
Have to check out harness and maybe bring a solinoid next time i go back, to reduce possibly waiting in a workshop.

 

[jackwhoo]

I wanted to post my feedback and finding on my issue I faced and fixed with my comfortmatic gear box but wanted to say this worked for me I’m not saying it’s everyone’s issue yours could be a different contact or sensor but still my findings point to the harness or contacts

I had the No transmission fault no gears available check handbook …. So I’ve owned a comfortmatic years and knew about these issues from a friend and others that have faced similar issues

Many talks with Fiat and commercial truckers garages and iveco or promaster threads etc I really dived into these issues on many cases and was told this that 98% of issues relating no transmission was the harness or contacts or electric fault
Very few cases gear box removed or clutch and still may have not been that but was changed anyway
In hopes
I first got this so know first hand garages do say new gear box / clutch and try the expensive changes first it seems working through parts ticking off a list …. Not all but most garage. I was lucky in away having helped a friend have sensor issues regarding this m40 gear box so it’s the first I tried

What I did while vehicle was running well the AA guy did after I told him
Was he moved the selespeed harness while engine running which we heard a clink no more beeping no transmission on dash
Moved it again it came back in the dash

On the rear of the gear box easy through battery tray when battery removed to get to unplug the 4 in question, you will see on this harness evo 0.1.2.3 mine was the contact on the gear engagement it was broken and a short was happening so I removed the harness completely stripped the plug and purchased the new one from te connectivity job complete

A year later it happens again slowly approaching a roundabout parked up got under unplugged and cleaned with contact cleaner all good
Got me home this time was the actual sensor

My point is the leaks these Ducatos have especially if a old ish van 2006 to 2010 scuttle leaks etc dropping on the gear box corroding sensors and contacts issue after issue
Only using the van a few months out the year is very bad for this also

Get the scuttle tray sorted first
Get the harness taped up nice and clamp down to stop movement this also weekens contacts or brakes
Get wiring around headlight
Earth strap
My 3.0 also the starter battery was only 95ah I changed to 110ah big difference
Cleaned all contacts on plugs then filled them with electrical snot forgot the name to stop any issues getting in
I bled the small reservoir very old fluid filled with patronas dot 4
Changed hydraulic fluid rectangle reservoir filled with new patronas cs speed 75w
Dropped gear box oil 2.9 filled with new patronas transmission geartech 75w-85
Cleaned brake switch
It’s now running brilliantly had no issues at all
But to keep on top of this I will clean the harness contacts every year because they was badly corroded first one was damaged

I may even look into the relearn after changing the clutch speed sensor I didn’t do anything with the smart/plus or multiscan just disconnected the battery before any work carried out
Just reading up now on the gearbox update and relearn procedure
Anything to try get this sorted for good

But I’ve not owned the van from new so you don’t know how long leaks have gone on for etc so corrosion had already started on the harness contacts
So I suspect on the gear box side of sensors or female plugs would have been the same so clean both it’s a time consuming job so glad I did this myself

No learning required for the clutch speed sensor. It actually measures the speed of the gearbox input shaft .

Please post a link to the page where you got images of comfortmatic illustrations .

 

[Seanwinder22]

No learning required for the clutch speed sensor. It actually measures the speed of the gearbox input shaft .

Please post a link to the page where you got images of comfortmatic illustrations .

I can send everything to download

 

[Seanwinder22]

No learning required for the clutch speed sensor. It actually measures the speed of the gearbox input shaft .

Please post a link to the page where you got images of comfortmatic illustrations .

 

[Seanwinder22]

I will post everything that helped me and please try what I did it will help
Please don’t be taken down the new selespeed or gear box or even the crap the plastic brakes off on clutch plate
This m40 is bullet proof the cheaper parts fail like sensors contacts etc

 

[Seanwinder22]

More

 

[Seanwinder22]

Clean every part of that harness inspect contacts you will find something saved myself £1000s I love my van and the comfortmatic I am not pulling it down at all
This is the only issue I’ve had

But…. I didn’t get much help from fiat dealers etc
Fiat at Italy gave the most information and assured a friend to look down this route

Haulage garages that have these gear boxes in everyday have the most input if you can find any
I can’t remember the name off the top of my head it was Scunthorpe area I will find the emails

But basically I posted the download and in that is what they basically said about the other harness that runs through the bulkhead to the brake pedal it can rub in this area
Or heat from the engine can have issues on the wires

But the biggest was water ingress in the engine bay
But I am here if I can help because I know how frustrating this can be with not much information

I actually thought I was going down the big money path I’ve spent under 100 quid and that’s on new oils etc
The contacts was pennies

 

[Seanwinder22]

I will explain my issue more in depth and how it appeared
First time started the van after massive rain on a weekend site up on the levellers it had been parked

I put the key first thing I do because leave it in gear
I pressed the brake moved the gear stick to neutral ready to start and started the van
Brake still pressed moved to gear ready to take handbrake off and started to beep then seen the red transmission bonnet thing saying check transmission see handbook
Tried again no gears available

While engine off gears was selected and reverse etc but I had a understanding at this time because a friend had previously gone through this has I say

AA came out because I needed them for the diagnostic reader mine at the time wouldn’t communicate with the gear box

I told him lots of information about sensors etc
He started the van moved this harness it selected gear
Which then told us this was shorting

He tie rapped it in place it got me home I repaired after much research on which contact to buy
If yours is the same I can give item number etc what to buy

Year later approaching a roundabout slowing down it did it again but this time just needed a clean and been fine

To make sure I took other steps on all information just trying to cover my back changing dot 4 etc I made videos showing how I changed all oils etc if that helps
Placed another earth strap on so doubles up which did give my starter battery a push from 13.4v I now get 14v
Changed battery to 110 ah from 95ah
All these little things like I say might not be needed but just incase
I know my van has do we all how it sounds and runs and my van sounds nice now smooth drive and gear changes

I also noticed having the hill climb button on all the time really helped with faster gear changes too
A motorhome is always loaded and that’s what this button is for
Once pressed you get a E near the auto on the dash

 

[Seanwinder22]

Clutch bleed

 

[Seanwinder22]

Hydraulic fluid change

 

[Seanwinder22]

Gear box oil change

 

[Seanwinder22]

Trying to buy a harness good luck with that I tried every place for my part number not a chance
They wanted 1200 I had to buy the whole selespeed unit to get the harness so decided to repair
Tried sequ parts and magneti couldn’t help me
I have the part number for this harness

71749956

 

[dagbj]

Mine is a integrated hymer from 2016.
Is there ony one type robot( selespeed cfc 348 ) for the m40 gearbox?

 

[Seanwinder22]

Mine is a integrated hymer from 2016.
Is there ony one type robot( selespeed cfc 348 ) for the m40 gearbox?

I’m guessing they have different ones but they all do the same thing and built the same because those download I posted are based on one drawing suits all
I just think the harness part numbers are different
When I got sent that download it doesn’t say for a 3 litre multijet just says m40 selespeed

 

[Seanwinder22]

This image here which I posted the download
I had issues with number 3 which is evo 1 solenoid for odd gear engagement
And number 1 which is evo 0 solenoid for controlling the clutch
Which think about it guys these will throw out the no transmission fault gears available these are the most 2 important solenoid out the bunch
I’m actually starting to think possibly every post made about no transmission these are the culprit

The scuttle tray leak needs sorting 100%
But fiat made this hard work pre facelift
Even the back of the air box drain empty on the rear gear box

Corroded contacts
Harness not clipped enough will move and vibrate
Eventually the contacts snap with so weak
They short out kicking the no transmission

Anyway good luck to anyone that reads this thread I hope it helps
I have posted everything I know

 

[Seanwinder22]

Leave this button on also just try it let me know so in the manual it’s basically for a loaded van
Which in a motorhome you are always loaded so this helps massively
I noticed a smoother gear box change
At first setting off in auto in first it took for ages to change to second
When your waiting for the change and can hear the engine thinking omg change already what you playing at Igot this all the time
So made calls thinking maybe the clutch was to blame for my issues with the no transmission etc
Anyway fiat told me this helped with hill climb and loaded vans like a sport mode more torch even helps the steering
But my gears change faster it’s more responsive honestly try it yourself

in normal vans they pressed this going up steep hills if holding lots of weight

well in a motorhome coach built it’s a fiat cab basically with a caravan on the chassis so yea it’s loaded

now when I set off I don’t get the long gears on the straight only on climbing hills it holds gears longer but the manual explanation is better then mine
But lots of benefits to this button if in auto mode obviously now I leave this on all the time

one more thing I’m looking into which my boss put me on to with his motorhome is the tcu flash tuning box which basically uses the obd to upgrade the gearbox which fiat can do this upgrade but it’s about £500
This jfa elite flash is £280 resets the TCU adaptation parameters in which allows it to relearn over the next 200 miles.

 

[Seanwinder22]

Has promised I made a video of all possible fixes and information from all fixes of the no transmission faults I could find going back to 2010 so every fix I talk about

I’m sorry I can’t just say it’s just one because we have different sensors and contacts on the gear box

Sometimes it’s just fuse f24 f26 f27 relay
Sometimes it’s the gear box to chassis strap or the starter battery or brake switch

I talk about all of them showing information before then showing the very last 3 which involves getting the hands dirty

Very last solution if nothing works you are in the 2% that needs slave change or the clutch plate

Also this channel I’m posting on I will upload videos on different information on mods and fixing other parts yourself especially the scuttle tray and drains etc and how to keep the injectors from rust once fixed issues so look out for those

Just remember it can be fixed the comfortmatic is still a brilliant gearbox and since I did these fixes it’s been working perfectly and far much better then its ever performed so all this work you do carry out still doesn’t go to waste

Here’s a link to the full video