Hi,
I was wondering if heated wing mirrors is a "learnt" function, or if it needs enabling by Fiat? I have all the wiring in place, even the relay and fuses (T11 and fuses 40 and 41 if I remember) . I only need the button on the dash controls.
Thanks

I'm pretty certain that you'd need to connect to the body computer with MultiEcuScan and check if the option is present in its configuration. If so, you can enable it and it should work. If not, Fiat will say that you would need to order a new body computer.


If it's not showing as an available function with MES, it might be possible to enable it with AlfaOBD software, but having never tried I can't say for sure.

Thanks for your reply.
I connected it up to MES, and the only thing I could see was to test the actuators (Heated Rear Window LED, and Control)
I hooked up a switch panel from a friends van which does have heated mirrors, and ran both the tests. The LED worked, and I heard the click from the relay.
I monitored the heated rear window parameter, and when I pressed the button, it registered as On.
The flaw in the plan is that it didn't stay on, and the LED also didn't come on. As soon as I let go of the button, the parameter registered Off again.
I have a demo if AlfaOBD on my phone, and it looks like the only reconfiguration I can do is around the alarm, and program a new key (If I had the codecard)

Thanks for your reply.
I connected it up to MES, and the only thing I could see was to test the actuators (Heated Rear Window LED, and Control)
I hooked up a switch panel from a friends van which does have heated mirrors, and ran both the tests. The LED worked, and I heard the click from the relay.
I monitored the heated rear window parameter, and when I pressed the button, it registered as On.
The flaw in the plan is that it didn't stay on, and the LED also didn't come on. As soon as I let go of the button, the parameter registered Off again.
I have a demo if AlfaOBD on my phone, and it looks like the only reconfiguration I can do is around the alarm, and program a new key (If I had the codecard)

Looks like it needs to be an X250 facelift with the Marelli 11 BCU to be able to access the extended configuration functions in AlfaOBD.

As I said, I don't know if it would help anyway. It may just be doing the same as MES, that is allowing you to enable s function that's already programmed into the BCU but not enabled. AlfaOBD lists a lot of options for config changes on some vehicles/ECUs, but unfortunately doesn't indicate whether they can be applied on the specific vehicle it's connected to, so you need to back up the BCU config before trying in case the result is problematic

madlec said:

Hi,

I was wondering if heated wing mirrors is a "learnt" function, or if it needs enabling by Fiat? I have all the wiring in place, even the relay and fuses (T11 and fuses 40 and 41 if I remember) . I only need the button on the dash controls.

Thanks

Click to expand...

As said above, MES should show if the option is there

I had a 3.0 180 Euro 5 with no outside temp display but upon checking the binnacle and the mirror, the binnacle was correct for display but mirror had no sensor

Fiat said you can’t “turn it on” if I fit a mirror with sensor

So I fitted a mirror with sensor (after accident with old mirror) and using MES I turned the outside temp on, bingo Fiat were wrong.

Personally I thought all Ducatos had heated mirrors as std, not seen one without

I have a feeling that the pre facelift BCUs are programmed in the factory depending on the trim of the van ordered. I am still researching.
Its not the end of the world if I can't get them to work, but its a right pain when they mist up when driving...

madlec said:

I have a feeling that the pre facelift BCUs are programmed in the factory depending on the trim of the van ordered. I am still researching.
Its not the end of the world if I can't get them to work, but its a right pain when they mist up when driving...

Click to expand...

They are all programmed at manufacture with the specification of each individual van. That is why Fiat's stance is that a new BCU has to be ordered if you want to change anything not included in the original spec.

Sometimes items are included as "prep", i.e. the function is included in the BCM but not enabled because the associated hardware is not fitted. If that is the case MES will show the function as available but not enabled, and you can select it and carry out a proxy alignment to enable it.

I have seen indications that AlfaOBD may sometimes be able to change the programming of the ECU. There are people on US forums, for instance, who have successfully used it to install LED DRL equipped headlights in some vehicles where filament DRL bulbs were originally fitted. That isn't just a matter of enabling a dormant function, it is as I understand it changing the logic of the BCM programming - something which Fiat claim cannot be done.

That is why I said that installing the mirrors may be possible with AlfaOBD, although it appears that the function can only be selected for X250 facelift and X290 vans with the Marelli 11 BCM.

But I have also seen reports on US forums of people attempting things that are available in AlfaOBD and totally screwing up their vehicle, which is why it is important to create a backup of your BCM config before you do anything. You can do that most easily in MES by copying the proxy config to a text file that you can write back later if necessary.

It may be possible to do certain things that Fiat claim can't be done, but you need to be confident of the procedure and have a backup in case things go wrong.

I have used AlfaOBD to change the config of my uConnect radio and disable the rear speaker prep that was factory enabled in my vans ECU - neither of which MES can do, and it worked perfectly. But again, on some US forums I get the impression that AlfaOBD presents a list of everything that might (but not necessarily is, depending on the original config) possible to change on a particular vehicle, and doesn't warn you before you attempt something that could go wrong, whereas MES, although not having quite as broad functionality in that area, does at least check the current config of your vehicle and only allow you to change what it knows can be done.

Hi,
I did some more research and tests, and there doesn't seem to be a way to do it on Marelli 6 BCU. So, I built my own controller and bypassed it. They work a treat now. Thanks again RS3100 and rolopolo for your replies and advice.