MPG stuck at 99.99 after swapping in a digital instrument cluster

[M3GX]

My original instrument cluster was dying, stuck with no dial movement half the time. I went out on a limb and bout a digital instrument cluster off of Aliexpress. Thing works pretty well, and gives a more modern vibe. No issues with it, but my center console reader doesn't do MPG readings anymore. It's been stuck at 99.99 MPG since. Everything else works fine. I've tried holding down the reset button and some other things, but no luck.

Any ideas?

Link for the one I bought, though the price is $1k more now for some reason. But there are other sellers with the same unit for less than the $750 I paid last year.

https://www.aliexpress.us/item/3256806738878769.html

https://www.aliexpress.us/w/wholesale-gx470-digital-instrument-cluster.html?g=y&SearchText=gx470+digital+instrument+cluster

 

[M3GX]

I'm also curious what RPM's people normally see while driving around normally, at different speeds?

the 1.5k RPM I see seems low, but i didn't really notice what they were at before the swap.

 

[Stonefoot72]

Just assume it's 13.5 mpg and think happier thoughts. I still love mine every day though. The fuel door is classic Toyota reliability. Still opens flawlessly, even after 1,000,000 trys!

 

[Stonefoot72]

That cluster looks great, BTW. Wish I had more than snark to contribute, but yours is the 1st I've seen.

 

[M3GX]

That cluster looks great, BTW. Wish I had more than snark to contribute, but yours is the 1st I've seen.

Thanks! it has it quarks. Like most of the features within the cluster don't work since those options were available on the GX470 to begin with. And i had to buy a separate controller to navigate it's functions, and that doesn't work great. So I just leave it on the one screen all the time.

It was either spend $750 for a digital cluster and experiment with it, or buy a reman OEM cluster for almost $400. I figured it was worth the shot since I haven't seen anyone else on any of the forums sporting this yet.

 

[Rednexus]

The MPG meter relies on the vehicle speed signal (VSS) coming out of the dash. The VSS wire first goes into into the back of the OEM head unit. I know as I spliced a speedometer connector into the wire on my GX470 to have the speedometer dialed for larger tires. The VSS is then transmitted back to the MPG meter. I'm unsure if it's transmitted as a VSS signal (with the MPG computation done in the MPG meter) of the computation is done in the dash or somewhere else.

I'd say that dash is (for some reason) not sending the proper signal back to the MPG meter. You'd probably need to contact the developer to see if it's set up to do that.