Technical Temperature sensors

[theoneandonly]

There are a number of ambient temperature sensors on the Ducato
1 IAT in the MAF sensor
2 with MAP sensor (not exactly ambiant)
both controlled by engine ecu
3 temp sensor in mirror
body ecu.
with the Adblue models there are even more temperature sensors.
The temp sensor in mirror has a significance in regeneration of adblu models definitely Peugeot Citroen models.
Does it have significance in regeneration of twin egr models, X250 or earlier ?
Has any one got a model with a dead mirror sensor but regen still works. I suspect it should because the IAT is used for this function, why? Because these are all important critical to the engine and are controlled by the engine ecu on the high speed can bus. The mirror sensor is controlled by the Body ECU on the lo speed canbus and is used by electronic climate control and possibly the comformatic. But could be totaly wrong because its use on Peugeots. Any ideas out there.

 

[the green vanper]

As far as I know, in the x250 the temperature sensor in the mirror was optional except when the van was equipped with automatic AC.

My van is not relevant, so I cannot confirm, but it was not installed in the factory.

Someone with diesel engine and without the temperature sensor shall confirm if the DPF regeneration is possible and works as it should be. I'll try to ask two or three friends that drive diesels if they have the temperature sensor installed.

 

[HughJampton]

The information in the x/290 Converters Manual (available in downloads) implies that (at least for non Ad-Blu models, which it pre-dates) the external temperature sensor is a requirement only when the vehicle is fitted with Automatic Climate Control and/or the Comfortmatic gearbox.

This is detailed since some such vehicles are provided as Chassis Cowls, without any mirrors (or doors ) and thus the converter must add a sensor elsewhere.