Yellow Box Speedo Calibrator

I got the Yellowbox installed and it's dead on! It literally put a smile on my face! No need to drive with GPS now. Thanks, @seth419 for your pictures. They helped out tremendously.

 

I've been driving with my torque app so much lately it doesn't bother me anymore. However, if we start getting a tax per mile my speedometer may need to be adjusted.

I actually find myself not even looking at my gauges unless it's to check fuel level or temperature haha.

 

Man, I hope that tax doesn't go through. What a joke.

 

Doesn't that yellow box go both ways

 

It sure does. There is also a not ethical and possibly not legal way to stop the odo in these trucks. I know a guy who did it to his.

 

I know a guy that did that too. He may never get his 50 miles of driving back. Resale value out the window!

 

Finally had the chance to install and cal the Yellow Box. I haven't put enough miles on the fix to see how mileage is affected. However, the drivability is back to normal. I wish I had done this a couple of years ago. Thanks to 2006 Tundra and seth419 for their invaluable input.

Side note: Be sure to stow the Box inside the kick panel as soon as you're calibrated. Once I had a good cal, I set it on the e-brake pedal, told myself "I'll remember it's there" and then monkey-stomped that e-brake pedal as soon as I parked at the house. Destroyed the fuse holder (could have been far worse). 2min fix but head-shakingly careless.

 

I had to tuck mine in because the blinking lights were distracting at night. Good call.

 

Just want to say I love this forum and thank you all for documenting your work. I just finished my Yellow Box install and it's working great!

To share with anyone that matches my truck and the new YBv6 -- 2005 AC with ABS and no VSC: You will need to splice the brown/black wire (violet/white is for DC) from the ABS ECU. You can either do it at the ABS connector, or from behind the instrument panel like I did to save yourself some cable length as you can tap into the switched fuse panel easily. Also, the YBv6 instructions allude to using the 2-wire sensors as the ABS are sinewave according to Yellr, but that won't work. You have to set switch 1 to squarewave or 3 wire for it to work. The Toyota wiring diagram shows each sensor as being a 2-wire, so this confused me and caused me to check everything again, even though I knew the wiring was right, but I don't know enough about electronics to tell you why.


Also, anyone know what the light gray wire that's added, but terminates before the connector is for on my Combination Meter large cable (you can see it in my picture)?

 

that wire is the antenna wire for the key fobs.

 

i take it they still dont make a plug and play for the 05-06 trucks? technically im sure the 07 tundra box will plug and play with our trucks. the ABS style signal is identical to all modern toyotas. hell my radio does ASL. vehicle speed increases the radio volume because i wired it to do so..

 

Not that I'm aware of, but honestly, it's a pretty easy install on our trucks. Only one wire to cut.

My radio does that as well, and I was using it, but the speedo and odometer being off really bothered me the moment I got the bigger tires. Glad this was easy and can be removed and transplanted to a newer vehicle if that ever happens.

 

@Casper421

 

Just ordered mine!

 

Oh yeah!! You're going to love it.

 

OK, cool, late to the party but getting my ducks lined up on this one. Thanks Darkness.

 

The a340 should have a speedo gear you can replace like the tacos to avoid the calibrator

 

You waited this long to tell us that?

Do they come in a lot of ratios or is it just for the standard Toyota stuff (supporting 4.10, 3.91, etc)?

 

It’s a guessing game. The speedo gears are documented on the Tacoma forums.

 

Bump so I remember to install now that I’ve done initial calibration setup using rough math.

I’ll hunt through the thread to see where you guys choose to run into the cab. I see a decent spot under the drivers seat where it looks like the grommet might have some space.

Hopefully there is only one connector on the transmission which is the right shape.

 

I went through the driver side fire wall. I basically copied @seth419

https://www.tundras.com/threads/yellow-box-speedo-calibrator.31996/page-5#post-2239759

 

Did you de-pin or stuff the 4 pin connector through?

I'm thinking of de-pin but haven't found a perfect tool for it, found one size too big and one size too small.

 

I didn't have to do any of that. I just noticed you have a 2002, and the 04-06's are a different set up. Sounds like how @Darkness did his is more your speed.

 

I'm shocked nobody makes a true no-splice plug-n-play option for this.

 

I hear ya. I've waited for years for someone to come up with something like that. Chevy's and Ford's all have an OBDII thing that you can plug in and change the speedo.

 

The kit I have is fully plug and play. Just need to poke into the cab for the yellow part of it so that it stays clean and I can fiddle with it if I need to. Thinking I might route to the rear wall of the cab since I'm a RC and the stock jack is already there, leave enough cord to reach it if I want to fiddle with it while on a drive to fine tune. You have to power cycle to get the new config to take anyway so doesn't need to be that accessible. My kick panels always end up stuffed like sausages.

I just need to get it through a grommet and locate the proper connector and I'm done.

 

I’m trying to locate a male side connector to mimic the factory cluster so I can make a t harness.. I hate cutting factory wires. If not I’ll get a small connector that uses The same pins and just have a random extra connecotr that can be easily taken back to stock later.

 

From a quick glance it’s a flat 3. I have two styles so I might have what’s needed. But my yellow box is in the Tundra, my spare connectors are at Home and I’m at my sister in laws.

 

Mines a 40 pin amp/TE 0.64iii connector

 

Where's is @Darkness? Haven't heard from him in awhile.