The first thing I did to my LX470 when I bought it a few months back was put new tires on it. I went with 275/70r18 Cooper AT3s. They're great tires, but I wasn't crazy about how my speedo was now showing 4-5 mph slower than my actual speed on the highway.
I started researching all of the different options out there to see if somebody made something that was "plug-n-play" for the 100-series. I generally prefer to avoid cutting into factory wiring harnesses if I can avoid it.
I saw that Yellow Box was offering their device for purchase "with Custom Plug-n-play wiring harness". I e-mailed them to find out if they had one that would fit my vehicle. They sent over a couple of pics of their "Toyota" harness and I was able to confirm that yes, it should fit. So I ordered it and about a week and a half later, it showed up in my mailbox (not bad from Australia).
You get the Yellow Box, a universal harness, and (if you order it) your PnP harness. The box is very simple and tough looking. It just has 2 buttons that you use to adjust the correction ratio up or down. It's really easy very easy to set up.
The v5 Yellow Box:
With the PnP harness:
The PnP harness attaches to the speed sensor plug coming directly off the transaxle. I did the initial testing by plugging it in and then running the cord all the way around to inside the cabin through the drivers door. I just gently shut the door on the cable and that seemed to work ok.
This is the plug you want coming off the left side of the rear of the transaxle:
The question then became where to mount it? I initially wanted to somehow route it inside the cabin. But after looking for a while, I couldn't see a way to do that. The other issue was that the yellow box itself doesn't have smooth side surfaces, so I wasn't going to be able to attach it directly to anything under the car.
I went over to radioshack and picked up a 3x2x1 project box. The Yellow Box fit inside of it nicely. I cut a hole in the side with my dremel for the molex connector, put everything inside (with a couple of strips of foam tape to prevent rattles) and sealed it up with Toyota FIPG.
I then got some of the black silicone sealant/adhesive (not the RTV) because I wasn't sure if FIPG would work as an adhesive. I mounted the box to a flat spot on the underbody up above/behind the crossmember and put some masking tape on to hold it in place while it cured. I wound up the excess cable, zip tied it, then zip tied that to one of the hoses running along the cross-member (that way if the adhesive fails, the zip ties should catch it), and then plugged in the harness.
Plugged in:
Mounted to the underbody:
Another angle where you can see the cables a bit more:
I came back out to check on the mount this morning and it appears to be very firmly attached to the body, so I'm calling this one good to go. It's a pretty easy project and doesn't involve any cutting of factory harnesses.
If anybody has any ideas about how to route it up into the center console (my original intention), I'm all ears.
I started researching all of the different options out there to see if somebody made something that was "plug-n-play" for the 100-series. I generally prefer to avoid cutting into factory wiring harnesses if I can avoid it.
I saw that Yellow Box was offering their device for purchase "with Custom Plug-n-play wiring harness". I e-mailed them to find out if they had one that would fit my vehicle. They sent over a couple of pics of their "Toyota" harness and I was able to confirm that yes, it should fit. So I ordered it and about a week and a half later, it showed up in my mailbox (not bad from Australia).
You get the Yellow Box, a universal harness, and (if you order it) your PnP harness. The box is very simple and tough looking. It just has 2 buttons that you use to adjust the correction ratio up or down. It's really easy very easy to set up.
The v5 Yellow Box:
With the PnP harness:
The PnP harness attaches to the speed sensor plug coming directly off the transaxle. I did the initial testing by plugging it in and then running the cord all the way around to inside the cabin through the drivers door. I just gently shut the door on the cable and that seemed to work ok.
This is the plug you want coming off the left side of the rear of the transaxle:
The question then became where to mount it? I initially wanted to somehow route it inside the cabin. But after looking for a while, I couldn't see a way to do that. The other issue was that the yellow box itself doesn't have smooth side surfaces, so I wasn't going to be able to attach it directly to anything under the car.
I went over to radioshack and picked up a 3x2x1 project box. The Yellow Box fit inside of it nicely. I cut a hole in the side with my dremel for the molex connector, put everything inside (with a couple of strips of foam tape to prevent rattles) and sealed it up with Toyota FIPG.
I then got some of the black silicone sealant/adhesive (not the RTV) because I wasn't sure if FIPG would work as an adhesive. I mounted the box to a flat spot on the underbody up above/behind the crossmember and put some masking tape on to hold it in place while it cured. I wound up the excess cable, zip tied it, then zip tied that to one of the hoses running along the cross-member (that way if the adhesive fails, the zip ties should catch it), and then plugged in the harness.
Plugged in:
Mounted to the underbody:
Another angle where you can see the cables a bit more:
I came back out to check on the mount this morning and it appears to be very firmly attached to the body, so I'm calling this one good to go. It's a pretty easy project and doesn't involve any cutting of factory harnesses.
If anybody has any ideas about how to route it up into the center console (my original intention), I'm all ears.
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