![]() |
![]()
![]() |
![]() |
#1 |
![]() Drives: 2010 toyota yaris hatchback Join Date: Mar 2021
Location: SoCal
Posts: 13
|
![]()
I have been searching the internet for a long time to find how to install a tach on my tach-less 2010 base hatchback Yaris. There is one here on this site but it is not that clear so I decided to make one with clear images and what wires to use. I'm going to include wiring diagrams to help those who can read them find wires easier but if you cant read one that ok, you can still follow along the pictures and ill try to make it as clear as possible where everything is and what I used. Remember I'm giving step by step for MY CAR, the 2010 Yaris hatchback base edition. if you have a new/older one or model s, things might differ a bit and you'll have to do research on whatever is different from what I have. If you can't find anything pls ask me anything as I know how hard it is finding reliable info online. even if you see this post a month or year from now. someone else might see and answer your questions. Good luck.
The tachometer I used is this cheap one from amazon here is the link https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 as you can see it has four wires, green, red, black and white. White is the light in the tach. black is ground. red is power. and green is the tach. colors may vary depending on your tach so read the instructions and figure out which is. I'm gonna start with the most important one and it's the green (tach) one. On a 2010 hatchback Yaris, there are 3 places (that I know of) where you can get a tach signal. first is the ecu it self in the engine bay on the passenger side, which is hard and annoying to reach and if you break it, it's an expensive repair so i would refrain from getting it from there. Second is the Tire Pressure Warning ECU which is infront of your passenger under the dash. That one is far and you have to run the wires back to the other side of the dash unless you want your tach on the passenger side. The last and the one I used is the DLC/OBD connector. The DLC has a tach wire in pin 9 as you can see below. (uploaded the diagrams in pdf and png format for lower spec computers) DLC diagram.pdf The highlighted Green wire is the holy wire that will give us tach signal. in my car its orange because I have a Tire pressure warning system. that's the light that tells you your tire is flat/has low pressure ![]() After you find the correct wire, you can tap into it from above to get your signal. as you can see in my picture above, I used a blue wire clipped to the male end of one of these bad boys from amazon https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 and the female end you have to attach to the tach wire by clasping it really hard and make sure to put the wire in the right place or you'll cut it. here is a more close up picture of where the wire is in the DLC. this one shows where the tach wire is clearly. Now the next hardest thing. Where to find power. On my car I got power from a connector that had power ONLY when the ignition was on so that the tachometer turns on only when the car is on or the engine is on. but basically it turns on before the engine does. The connector is located in the instrument panel which is right above the DlC as you can see below: in the wiring diagram and the picture. it is the green wire (that I tapped into with my red splice) that is above the blue and grey relays. The wire is connected to pin 3. Instrument panel.pdf and here is a better picture of where it all is that is where you get power which is going to power your tach as well your tach's LIGHTING. so after you run a wire up to where you want, you have to strip the power and light wires on your tach (white and red) and then twist them together and connect them to the power wire from the car using this ![]() And the last thing you need is ground. This one is easy so I left it for last incase people didn't want to read all this. I personally got my ground from a bolt near my foot rest (obviously to the left) near the door. First you have to remove piece number one in the picture below. its clipped so you can pull it and put it back one after you are done, make sure the carpet is tucked into it too so it looks good. i forgot to do dat. then remove panel two. (I have no idea how I took that one off it was kinda of trick and when I put it back it was kept in place by piece one in the picture, the 2nd connection i couldnt figre out how to put back on, there might be a little nut holding it but mine was missing cuz bad mechanics lost it) after you have sucessufy removed them, you can get ground from this bolt below how I did it is by getting one of these Terminal connectors ![]() Then I unscrewed the bolt (it's a 10mm btw) and put the terminal ring on the bolt as you can see here again now if you see above, under the white text there are wires that are tapped into but aren't connected to anything. you might have something there. I believe that's where the alarm/security system was or something like that but the mechanics I took it to removed it. so if it looks different down there, that's ok just find the one bolt there. once you have a wire connected to that ground you can run it bheind the weather seal and up near the AC vent. The weather seal is the grey dirty peace you see in this picture lmk if u need help. Last edited by 2010yarisHBbase; 06-04-2021 at 03:28 AM. |
![]() |
![]() |
![]() |
#2 |
![]() ![]() Drives: 2007 Yaris Hatch Join Date: Sep 2019
Location: Maryland
Posts: 50
|
Thanks for the tutorial! So, i dont want to touch the wiring in my car. I just like to have everything easily reversible. But In theory I could just buy a male tachometer connector and wire in the tachometer that way? Then it would easily removable.
I've looked online and I haven't been able to found an OBD tachometer that is JUST a tachometer. Most of them are HUDs that display RPM along with other information that I dont care about. Also the last HUD i tried had horrible latency. |
![]() |
![]() |
![]() |
#3 | |
![]() Drives: 2010 toyota yaris hatchback Join Date: Mar 2021
Location: SoCal
Posts: 13
|
Quote:
|
|
![]() |
![]() |
![]() |
#4 |
![]() Drives: 2010 Yaris 2D Hatchback Join Date: Feb 2023
Location: NH, USA
Posts: 3
|
Quick question, why not just tap into the power and ground wires behind the stereo? And just run the 'Tach' signal wire from where you got it from? thank you.
|
![]() |
![]() |
![]() |
Tags |
installation, tachometer, tutorial, yaris |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
NEWS: TOYOTA REVEALS ALL-NEW YARIS SEDAN AT 2006 LOS ANGELES AUTO SHOW | VitzBoy | General Yaris / Vitz Discussion | 7 | 09-20-2023 07:50 AM |
2014 Yaris LE Fog lights installation help. | Eforno | DIY / Maintenance / Service | 0 | 01-05-2016 06:20 PM |
06-10 Yaris Sedan cold air intake $40 | kylevh21 | Items for Sale by private party | 2 | 04-01-2012 02:14 PM |
installation of a front bumper to a yaris rs 2000 | Andreas | Cosmetic Modifications (Exterior/Interior) | 3 | 09-16-2009 11:42 PM |
2007 Yaris Pricing Info ! | YarisBueller | New YARIS Purchase Forum | 104 | 06-24-2009 04:54 PM |