Odometer and speedometer not working; Missing wiring to sensor

Hi Folks,

I believe they aren't working because the PO removed the wiring harness. The sensor on the transmission which I believe is the VSS has nothing connected to it. If that's true where does it connect to the main harness?

Is there a replacement harness for sale with connectors on both ends?

Thanks for any help

 

Is it possible that your transmission is out of a different year truck? I think the speed sensor setup is different depending on year range.

 

If I'm not mistaken, the 04 was the first year to use the speed sensors at the wheels.

 

My understanding is the VSS is this sensor here

 

I suppose anything is possible with this truck given the previous ownership

 

If that is the original transmission, that 3 pin connector is usually found on an 04 5VZ(V6) AC/RC
and is the V2(VSS) connector which is responsible for displaying speed and odometer.

As for harness, that is part of a multi-function Engine wire for a 5VZ AC/RC

Can you confirm what engine you have(2UZ or 5VZ) and whether it's manual or automatic.

 

My 2000 has wheel speed sensors at all corners for the ABS system.

 

Ok its an automatic and there is a sticker with 2UZ-FE on the underside of the hood.

I checked the wiring harness at the firewall and didn't see anything disconnected there, but didn't undo what looks like the original tape.

 

Is it possible someone swapped the engine in your truck at some point? And maybe used the donor engine harness, which may've had a diff't transmission? Or are you seeing evidence of hacking? Is your truck 4WD or 2WD?

 

I ran up a VIN for a RC/V8/SR5 here: https://toyota-usa.epc-data.com/tundra/uck40/3841/electric/8202/?frame_no=5TBKT44144S452958

In the event it helps ...

 

It's 4wd but unfortunately I have no background history to know if the engine was swapped or original

 

For the ABS yes, but I could sear someone on here said the 04 trans, even though its the 4 spd, used wheel speed sensors for the speedo, furthering the oddity that is the 04. I could be all fucked off too. Either one is accurate.

 

There's a number of questions that can be answered by registering an account at Toyota Owners. Then one can get Vehicle Specifications or share your VIN and those of us that have an account can retrieve that info.

Create Account

a limited example of one from the other day assisting a Sequoia owner....

 

I get it. Any check engine codes present? Don't trust the light unless you're 100% positive it's not burnt out.

 

Ok thanks for the help, my VIN is

5TBKT44194S446802

 

Yeah the light is on. I'll check for codes in case that might provide some clues.

 

The transfer case that's in the picture is from an earlier model. I'm guessing it's from a 2000-2002 non-ABS model? A 2004 trundra speedometer and ODO gets its readings from the rear ABS sensors that are located in the rear axle, right on top and next to the outer wheel bearings. It's no problems to install an earlier T case in a later model truck. Just make sure that something is plugging the VSS port (such as a VSS sensor) so that oil isn't spewing out every which way but loose. I'd look at the rear ABS sensors to see that they're not damaged. I'd also unthread the little M6 screws that hold the sensors, carefully pull them out and inspect them that there's not a bunch of gunk on them.

FYI, i swapped in a T case that was out of a 2000 non-ABS tundra and into my 2004 tundra...and then at a later point i deleted the ABS from my truck. My speedo and odo both work perfectly.

 

Oh cool that's a good clue! I recall seeing no sensors back there but did see them on the front wheels. Would that make sense?

Also, how did your truck get its speed signal after you deleted the ABS?

 

Somewhat makes sense about the 3 pin V 2 connector mentioned in earlier post and why no VSS connector ??

His Speed and Odo should normally be coming from Skid Control ECU W/ VSC or ABS Actuator W/O VSC, according to the EWD.

from Vehicle Specs....

"ECT Automatic Transmission"

Your Vehicle Specifications is attached below....

 

See? I was pretty sure the 04 worked different from 00-03, even though it has the same transmission.

 

I'd go and double check to see of those sensors are there or not in the rear axle. If they aren't there, it could mean that someone also swapped in an earlier 2000-2002 non-ABS axle housing. Post up pics of the rear axle so that we can see if it has those abs sensors or not.

To delete my ABS, i went the difficult route just to minimize the amount of lines and wires. The speedometer in my truck still gets its speed signal from the rear ABS sensors (that are located in the rear axle housing). From there it goes though the ABS ECU (that's directly attached to the abs pump. I removed the pump but left the ecu). Then the ecu sends a signal up to the speedometer. My truck did not have the optional skid control/VSC (thank goodness), just the abs...which was simple to bypass.

https://www.tundras.com/threads/tacoed-tundra-project.130491/page-4#post-3339039
https://www.tundras.com/threads/tacoed-tundra-project.130491/page-5#post-3348309
https://www.tundras.com/threads/tacoed-tundra-project.130491/page-8#post-3401152

 

Ok I checked rears and found no sensors. But it seems they are on the front.

Rear:



Front:



Also:



Does it seem like I have a Frankentruck? LOL

What a mystery, hope we can figure it out

 

Are those 2x4’s on the picture supporting your bed?

 

That looks like ABS sensors in the last pic.

 

Someone probably swapped the rear axle housing with one from a truck w/o ABS. And maybe swapped engine/trans from a truck that had a different transmission.

 

I remember from experience with my 2004 DC, the Odo and Speedo will go completely out if both of my rear speed sensors are disconnected. If only one is connected, it'll still work fine.



Your front spindle definitely has ABS and the rear axle does not. That rear axle probably did not come with the truck. If you have this module right here, that should confirm whether or not your truck has ABS from the factory.

 

Last year for the non-ABS option was 2002.

 

Oh yeah duh, forgot about that. The pictures definitely confirm OP won't have a working Speedo/ ODO unless they shell out for a new axle housing complete with shafts.

I'm sure the PO didn't know this tidbit when they bought the axle housing they installed, and just rolled with the consequences. Kinda shitty to not be disclosed by the PO; especially since the ODO mileage could be off by a ton since when they swapped housings.

 

Yes but that is the bed - a flat bed!