Technical Fiat Ducato 2.8 Jod / 2005 / automatic gearbox

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Technical Fiat Ducato 2.8 Jod / 2005 / automatic gearbox

BarbaraB

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Fiat Ducato 2.8 jtd / 2005 / automatic gearbox

Hello!

I hope maybe you could help me...

I have a motorhome with Fiat Ducato 2.8 jtd engine, model Maxi, 2005, X244 with automatic and semi manual gearbox. The same gearbox is in Peugeot and Citroen. The problem at the beginning was that we couldn't move the van, the gear was not recognised. Looked like electronic in the gearbox was burnt, that's what the mechanic said. After the "fix" it works and then when start driving, it happens again and the red light on the dashboard shows again. After switching the engine off and then on again, looks ok and then - happens again. The test shows an error P1712 - the magnetic valve for deblocking of the gearshift lever. The mechanic says that the +(plus) and - (minus) are not working properly, and from here the power supply goes to the electric solenoid valve...

Any suggestions on what to do?

I was also looking for a new or used part (part no. 55437991, 735327388, 59232003), but haven't it found anywhere, not even used one...

Thank you in advance for your help!
 
Last edited:
Hi Barbara.

I have this auto gearbox. It has electronic controls.

It may just be a bad earth? There are several.
I would cleanup all the earths in the engine bay.


Also, The connector plug on top of the gearbox is susceptible to corrosion if you have a waterleak into the engine bay.


Giving your earths a good clean would be the easiest first step to try.

I have had recent problems with mine. (Torque Converter failed)
 
Hi Barbara.

I have this auto gearbox. It has electronic controls.

It may just be a bad earth? There are several.
I would cleanup all the earths in the engine bay.


Also, The connector plug on top of the gearbox is susceptible to corrosion if you have a waterleak into the engine bay.


Giving your earths a good clean would be the easiest first step to try.

I have had recent problems with mine. (Torque Converter failed)
Hi!

Thanks for the suggestion. I visited mechanic today so I got more clear picture what is going on...
So you turn the van on, the automatic gear works, the manual is not recognised. Then you turn the van off and after turn it on again, the automatic gear (as well as manual of course) is not recognised and you can not move the gear handle/lever. Then you reset the wires/connection on the white connector (don't know how it called) and the automatic gear works again, the manual is not recognised.
The sensor is ok, torque converter is ok, battery is ok, connector plug on top of the gearbox is ok (no corrosion),...
So I asked him to clean all the earths, as you suggested. He will do this but he thinks it is the problem in the electronics - in the one that is connected to the valve... Do you have any suggestion maybe what to do, because he said he can not repair these electronics...

Thank you so much!
 
Hi Barbara.
>Then you reset the wires/connection on the white connector

Need to know about the white connector?
What is this connector?
Where is the connector located?
Can you take a photo of it & post ? At least we could see it?

This may sound silly....but are you doing these...
1. Foot on brake pedal ...before engaging gear?
2. Pull in button on shift knob with 2 fingers when selecting gear?

Note. Brake pedal position sensor may have gone?

There is electrical connections to the solenoids.

But the solenoid could mechanically failed.

Does your mechanic have a diag tool for the Fiat ECU and gearbox?
With the proper gearbox diag tool, you can confirm the gear selected etc.
in the gearbox ECU.

This is a before and after test.
Use the diag tool to read the gearbox ECU and observe the readings.
Cleanup all the earths.
Repeat ...Use the diag tool to read the gearbox ECU and readings.
Confirm the readings are valid.

Invalid readings can point you to a bad sensor or bad earths.(Mine did have bad earths)

Having the right diag software will enable the readings.
It will show sensors such as Brake pedal position.
( This will confirm sensor readings with the ECU and earths)

I think you need to take it to Fiat or a gearbox place that handles Fiat.
Your mechanic doesn't sound like he knows FIAT.
They will be able to put the Fiat gearbox diag tool on and know what they are looking at.

If you are technical savvy...

I use MultiECUscan (MES) and it reads the FIAT gearbox ECU and engine ECU via ODBII port.
Also reads the stored Error codes.
You need MES, a laptop, ODBII cables for FIAT.

Keep us updated.
 
or...

bad connection in the plug & socket on the wiring loom that feeds the selector unit, this is situated on the top of the gearbox.
 
I should mention ....The error code P1712 ...

The P denotes Powertrain(gearbox)


FIAT Kody posting ...maybe the same as Ducato????

P1712 Lever Release solenoid

Hopefully...knowing the part name will help source it?
But it could just be the plug connector.
Maybe that is the white connector you refer to?

Is that under/near the gearshift lever?
 
Hey!

The camper van was at official Fiat. They did the diagnose and the error is as you said - Lever Release solenoid (I just didn't know the right name in English so I used simple translation :)

Everything you have mentioned was checked, even all the earths... As I have mentioned in my reply below an hour ago, microchip is the problem. Do you have any idea where we can get the program for the new chip?

Br
Barbara
 
Hi Barbara.
>Then you reset the wires/connection on the white connector

Need to know about the white connector?
What is this connector?
Where is the connector located?
Can you take a photo of it & post ? At least we could see it?

This may sound silly....but are you doing these...
1. Foot on brake pedal ...before engaging gear?
2. Pull in button on shift knob with 2 fingers when selecting gear?

Note. Brake pedal position sensor may have gone?

There is electrical connections to the solenoids.

But the solenoid could mechanically failed.

Does your mechanic have a diag tool for the Fiat ECU and gearbox?
With the proper gearbox diag tool, you can confirm the gear selected etc.
in the gearbox ECU.

This is a before and after test.
Use the diag tool to read the gearbox ECU and observe the readings.
Cleanup all the earths.
Repeat ...Use the diag tool to read the gearbox ECU and readings.
Confirm the readings are valid.

Invalid readings can point you to a bad sensor or bad earths.(Mine did have bad earths)

Having the right diag software will enable the readings.
It will show sensors such as Brake pedal position.
( This will confirm sensor readings with the ECU and earths)

I think you need to take it to Fiat or a gearbox place that handles Fiat.
Your mechanic doesn't sound like he knows FIAT.
They will be able to put the Fiat gearbox diag tool on and know what they are looking at.

If you are technical savvy...

I use MultiECUscan (MES) and it reads the FIAT gearbox ECU and engine ECU via ODBII port.
Also reads the stored Error codes.
You need MES, a laptop, ODBII cables for FIAT.

Keep us updated.
So... :) Electric is ok, connectors are ok, everything mechanical is ok...
So after 3 specialists the problem should be the microprocessor which is not working and is overheating as well. We can buy new chip of course but we can not get the program (sw). And we can not find the name of the company that produced the lever or microprocessor for Fiat (we contacted fiat).
One information we have is that it should be possible to copy the program from other microprocessor that is working (with programator - a kind of computer machine, don't know the word in English). And the other information is that it is not possible to clone this program.
So we are in dead end at the moment and I have no idea who would know more about this or have a program or be able to clone the program...

So no good news so far...

All ideas and contacts about this would be helpful :)

Have a nice day,
Barbara
 
Hello BarbaraB.

I am in the middle of doing openheart surgery to my Fiat.
Pulling out my gearbox...


My understanding is there are ECU firmware updates....
Which can be flashed.
Fiat should ...should .... have those???

But

The good news...

I have the same ducato as yours.
I have the 2006 2.8 JTD with 4 speed Automatic gearbox.


I also have a working ECU. (electronic control unit)
(It may be possible for me to obtain that software out of my ECU. ...But I am no expert at this.
I might need to goto an expert here with my ECU?


I also had a working gearshift and gearshift solenoid lever.

Perhaps call these guys and ask?
https://www.ecutesting.com/product-catalogue/fiat/ducato/ecu-engine-management/

Do you need the ECU?
Is that the part name?

I don't think that will be cheap.?

You mention you were at FIAT...
What did they say about the part?
Get the part number from FIAT.
What is the part number you need?

Do they have it there?

What do you need precisely?
Once you can tell people, then we may be able to help.

The devil is in the detail.
 
Hi BarbaraB.

I may have misread your post.

If the issue is the Gear lever release solenoid...with microchip


You may be able to send to these guys.

Note. I have never used them.
...but this may be the best way to get you running again?


...................................

The best way to go about sending the unit in to us for testing would be to fill out a test form on this link; https://myaccount.ecutesting.com/?return=/TestForm Obviously until we see it in we are unsure on what we can or can't test on this unit. Obviously if we are unable to test it then there would only be a postage charge to get it back to you If it is tested no fault found then would incur a testing charge of £45 + VAT and postage. And the repair charge would be subject to inspection but we would always confirm a price before carrying out any repair.


Hope that helps!
Let us know if you do this.


Please let us know the result.



I will be very interested as I have this vehicle also.
 
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