4.2 D4D Ecu Reflash

[Pogle]

Does anyone know if the Denso ECU on this model can be re-flashed? I read some years ago that nobody had managed to crack it but that was some time ago and things move on. Internet searches so far do not appear to be conclusive.

Any info appreciated.

Thanks

[Avalon]

Still locked.

[Pogle]

Thanks Alex. I suspected that might be the case.

[firemac]

Does anyone know if the Denso ECU on this model can be re-flashed? I read some years ago that nobody had managed to crack it but that was some time ago and things move on. Internet searches so far do not appear to be conclusive.

Any info appreciated.

Thanks

Depends on why you want to reflash it. The early 4.2 petrol autos sometimes needed to be reflashed to cure gear selection problems but I've not heard of the diesel having ECU issues. Nevertheless, if anyone would know then ECU Testing Ltd. In Derbyshire will. If you google them, you'll get their website and contact details.

[Pogle]

Good info Firemac. I am considering EGR delete. Routine daily business for some makes/ models but it seems not for the 4.2 d4d.

[Heidfirst]

going by the Auris forum there is some progress towards remapping (I take it that this is what you mean rather than simply reflashing a Toyota stock map which is, of course, already doable by dealers) the D4Ds but still early days.

[Pogle]

I don't want remap Heidfirst just the EGR delete but would still need to get into the ECU for that. I think some have got into the later 2.0 & 2.2 diesels but not the earlier ones like mine.