Technical Throttle control actuator on a 2007 2.3 Ducato

Currently reading:
Technical Throttle control actuator on a 2007 2.3 Ducato

oliviezu

New member
Joined
Oct 26, 2011
Messages
2
Points
2
Hi. I am working on a 2007 Ducato Van with the 2.3 liter engine.
Water has got into the throttle control actuator and rust has partly broken it off the intake manifold part. Error code P0638.

On this van the manifold part is stamped IVECO and the actuator is marked the German company Mahler. The replacement part I got from a Fiat dealer is different in the way it fits right on the manifold but is a different design made by Magnet Marelli. The problem is that the electrical plug on the original has a 4 wire plug marked 1-2-3 and 4 but the replacement part has a receptacle with 5 pins of different shape and marked 1-2-3-4 and 6 and does not fit. Looking at a brand new Ducato with this same engine it is fitted withe same part as I got. Looks like this is a modification by Fiat. Looks like I would need a new or modified cable to get this to work. Does anyone know about this or has a solution for this new part to fit.
 
Hi, being a new owner of a 2007 Ducato for a few weeks, a engine warning light came up had it interpreted as P0638. Looking through threads i assume it is the throttle actuator at fault. The camper runs normally no drop in performance no smoke, drives normal etc
My request is where is the location of the actuator so i can clean the terminals etc and check if it's water ingress.
A photo would be bril. Engine is a 120 mutijet 2.3 litre
 
Should look like this, I believe it's fitted around the back or side of engine, access from below and above,
A long time since I had a mechanic change mine back in 2010,

Your probably best off just ordering a new one and the modified wiring loom if reqd, ImageUploadedByFIAT Forum1407424056.423888.jpg
 
Older one had actuator on the bottom hence any water of condensation accumulated in it - replacement part moved it to the side.
 
With the new throttle valve ( 504264089) you need the adapter cable ( 504388738). Parts from an Iveco dealer (same 2.3 engine) will be cheaper. The cable is about £100 from Fiat. Perhaps also try Ebay for a better deal.
Mike F
 
Last edited:
The valve will never cause problems again if you do not connect the wiring. The engine runs a bit longer when you switch it off, that's all.
 
The valve will never cause problems again if you do not connect the wiring. The engine runs a bit longer when you switch it off, that's all.

Will disconnecting it affect fuel consumption /pollution
 
Fuel consumption will be noticeably lower, so will CO2 and CO, NOx will be higher.
The whole setup serves to reduce emission in a new, clean engine to obtain European approval according to the law in 2007.
 
Surely when you go for your MOT it will give a high co2 reading and could possibly fail the test ?? or perhaps just re-connect for the test??

Has anyone tried this before their MOT?
 
Well this is misleading because when I disconnected the connecter there is no pulling power and is way down on acceleration so dangerous better to replace the unit.
 
Well this is misleading because when I disconnected the connecter there is no pulling power and is way down on acceleration so dangerous better to replace the unit.

If that is true, the valve needs to be cleaned or replaced. The pull back spring is in a cavity between the valve body and the actuator. Water ingress builds rust there and can even ruin the spring itself.
With the connector removed, the valve should be fully open.
 

Attachments

  • SAM_0700.JPG
    SAM_0700.JPG
    2.6 MB · Views: 247
  • SAM_0704.JPG
    SAM_0704.JPG
    2.6 MB · Views: 220
Last edited:
Back
Top