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Pretty expensive to modify to radar cruise control. 

Requires several modules, it was integrated with lane keep assist.

 

Need windscreen camera and the associated loom, the windscreen has a black dot sunscreen pattern that would need to be removed, or glass replaced. 

 

Millimeter wave radar behind grill, control ECU. New cruise control stalk, new clock spring, new dash clocks with the high end integrated screen, electronic brake servo etc. 

 

I actually don't know if it was available on non hybrids. 

 

Cruise control limit v has not been hacked, even across other Toyota vehicles that share components. 

 

Your need a new ECU from a USA Toyota, if you can find one that has matching fueling curves.

 

Alternative is to fit aftermarket throttle controller, these work by fooling the signal entering the ecu

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I think it’s more trouble than it’s worth and considering I have cruise control already it’s just lazy. I mean we own cars to drive then don’t we 😁 
i’m usually of the understanding the more gadgets you have the more can go wrong, which is why I didn’t even want electric seats but thank you for your enlightenment😁👍🏼

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  • 2 weeks later...

About the limit, I searched a lot, I contacted some big specialized companies that modify ECU progs in Italy, UK, USA, nothing.
So I bought a PIVOT (Japanese company) cruise control with the plug&play harness for GGH20, and now I'm able to use the cruise control with any speed.

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I bought it in April 2022 on Blackhawkjapan, including the electronic module, the brake harness and the special vellfire GGH20 harness (there's a compatibility matrix to find the right harness to buy) for 35000JPY shipping included, which is at the current low JPY rate 215€ or 180£.

 

BTW I just found out I wrote to Pivot support in Japan to be sure to not do any mistake and they were SO fast and gentle to answer, small part of the answer was the exact stuff to buy for my GGH20 : 

product:
3DA-T (similar to 3DA and 3DA-C, so don't make a mistake)
2A harness (connected to accelerator sensor)
BR-1 Brake Harness (connected to brake switch)

Then they sent me the Japanese manual + some pictures with english translation.
It was pretty fast to install, the "hardest" part for me was to find the speed signal cable because my radio got an aftermarket setup, but I took pictures and sent them, and they helped me to the end, until it was working.
 

The product is great, the support is great (Japanese people), so don't hesitate for the price.
 

Don't forget you'll lose the adaptive cruise control (if you have it), but you can always add a small switch to use one or the other.

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4 minutes ago, Chris.ac said:

You forget to mention, the pivot system also has various throttle mapping, so you get a smoother Eco or more aggressive throttle response.

 

Have you used these settings and can say if they make any difference?

Not used at all.
As I use my Vellfire mostly on highways, I just need to set it up to 140km/h (on gauge) or 120 and that's it most of the time.
And when I drive it on countryside roads, I don't care about how I use my gas pedal :D

 

Last but not least, I run it full E85, and my highest consumption is 14L/100km, which means ~10€/100km, which is still "cheap" for this kind of vehicule !

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The maximum speed is flashable (limit to 180km/h), but the cruise control limit is hardcoded in the ECU program.

So you have to dump the ECU memory and try to find in the bin file the memory value which hardcode this speed (with an hexadecimal editor), then modify it and find a way to flash the ECU (which is normally, with Toyota ECU not possible, or not that easy).
I know in the US, frankensteinmotorsport, who is well known for playing with 2GR-FE there (as there's a lot of them) got the memory address for USDM ECUs, but JDM ECU are different for that.
That's why after contacting a lot of companies and flashers (alientech, OVTune, Frankensteinmotorsport,Ivanperformance) I found the Pivot cruise control, which is doing the job perfectly, for a limited cost (as hours of researches with my ECU sent to Alientech for example would have cost a lot more). 

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Yep, i think we messaged each other on Facebook about the pivot system back when i found it. 

 

The hard speed limit, it's not that much of a problem, i don't tend to do over 112mph anyway, lol. 

 

The pivot system seems to be the least hassle, and of course you can easily disconnect the whole thing if changing vehicle or selling.

 

 

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