DIY: TACH INSTALLATION INSTRUCTIONS

[YarisAddict]

I Spliced the green wire into an orange wire that is on the far bottom left on the ecu port. I've read online that that was where I'm supposed to do it since I have tire pressure monitor. The orange wire is in replace of the greenish blue wire your talking about in cars with tire pressure monitor. It has been driving me crazy that it wont read rpms. Lights work and it has power, also I put my ground exactly where you have yours. Any Ideas?

Thx

09 Yaris3drhatch

[CTScott]

Originally Posted by YarisAddict

I Spliced the green wire into an orange wire that is on the far bottom left on the ecu port. I've read online that that was where I'm supposed to do it since I have tire pressure monitor. The orange wire is in replace of the greenish blue wire your talking about in cars with tire pressure monitor. It has been driving me crazy that it wont read rpms. Lights work and it has power, also I put my ground exactly where you have yours. Any Ideas?

Thx

09 Yaris3drhatch

The orange wire is the correct one for your car. Double check your splice, particularly if you used a tap splice, as that wire is only about 24 AWG, so the tap splice needs to be a tiny one to make a proper connection.

[YarisAddict]

I used the one that came with the kit. Is there any other way to splice the wires together? I'm just afraid now that the orange wire is basically in half once I remove that little plastic connector. Sorry I'm a noob when it comes to the wiring side of things.

[CTScott]

Originally Posted by YarisAddict

I used the one that came with the kit. Is there any other way to splice the wires together? I'm just afraid now that the orange wire is basically in half once I remove that little plastic connector. Sorry I'm a noob when it comes to the wiring side of things.

The best method is to strip insulation off both wires and solder them together and then tape or heat shrink. But, crimp on splices are fine as long as they are the correct size for the wires. If you remove yours and find it did cut the wire, it is actually not a big deal, since the tach signal to the OBD connector is really not used by anything.

[CTScott]

Originally Posted by Punishdln

I've got a yaris 3 2011 and i want to instal a tachometer but where i can find a guide ? Or it is the same things than i have to do ?
Also do you think i have to put off the steering wheel ?

Bonjour!

For your 3rd generation French-built Yaris it is similar.

The Tach wire is still in the same place on the diagnostic connector. The wire color may be light green or beige, but the position is the same:




For ignition switched power, if you have a key (instead of the Smart Entry system) you will use the pink wire on the ignition switch connector.

For ground you can use a bolt into metal under the dash, or any white wire with a black stripe.

For illumination, it looks like your French Yaris does not have the dimmer rheostat for adjusting the brightness of the speedometer, so you would instead use the sky blue wire in pin 18 of the headlight switch connector. Pin 18 has a pink wire on one side of it and a violet wire on the other side of it.

[jesus43block]

de donde sacastes la señal del rpm ? la puse en el cable azul y no me llega completa

[SirDigby]

hello. so if anyone read through all this and still has questions, i'm going to post what I did, and tomorrow I will post pictures of my install:
first, I tapped into obdII plug, light green or brown wire, for tach signal, ground is at kick panel. those are great places. for my power I ran it to the 7.5A by itself by the 15A fuse in previous post pics. and for illumination I ran it to the "accessory lighting" fuse, another 7.5A fuse, in second position. it should be noted, and it was never mentioned, that if you go the fuse plug route, you should remove the fuse and test which side of the circuit is hot when energized. wire goes on the "ground" side of the fuse plug so the circuit is protected from added load. hot side can cause wire overload/fire condition. on my testing the side of the fuse closest to the driver's seat was the hot side, but I urge you to use a volt meter/test light for testing circuit.
also when running ILLUM. wire to lighting circuit fuse it is not in the dimmer circuit but it is the "parking lights" circuit and remains constant, but not too bright to strain the eye.(imo) I like how if you crank the dimmer all the way down/off, the tach is the only lights!

[SirDigby]

[SirDigby]

I made my own gauge pod using "Testors" contour putty and lots of sandpaper.

[CTScott]

Originally Posted by ojgang

i recieved my digital tachometer. i have connected it but its alway on even if the switch is off.
can anyone tell me where to connect the power wire ?

The pink wire on the ignition switch connector is switched power.

[SirDigby]

I wired mine into the cig. lighter fuse.

[Eagle]

Thanks man. I got mine in today and if it wasn't for you I wouldn't know where to connect the tach wire.

[Eagle]

To the original post of course.

[greenskull]

I want to install a tachometer in to 2000 vitz, can any one advice on one to buy.

[littlecars]

Originally Posted by suzu

guys, i know that its great to get help in installing a tach. BUT i must say for some of the experienced stick sh. (manual) drivers, like myself, the tach is not necessary. i drive by hearing the engine and i can tell you it works perfectly OK. i am just curious....how many of you are actually gonna use the tach for the purpose of changing gears.

Hi, fairly new member, long time Car Guy. 2007 Yaris MT Hatchback. I need a tach!!! Factory fuel saving idle = 450 rpm. Toyota quality = really quiet idle. Cannot hear engine at all with radio on. So, low factory idle combined with unhearable engine = overrevving to start out, or you kill it when the light turns green. This is the first car that I've truly needed a tach for.

[littlecars]

Thanks, Yaris friends. I am looking at aftermarket tachs - the '07, MT Hatch is so quiet that I occasionally kill it, or over-rev at a light, and I've driven stick for decades... I just didn't know where to get that RPM signal from. Now I do. Thanks!

[laobo]

Any body for me link to buy Tach device, my yaris 2011

[littlecars]

Thanks all! I drive an '07 stickshift hatch back Yaris. Problems: 1.The engine idles so quietly and smoothly that I cannot hear it, especially with the radio on. 2. Toyota electronically idles the car at around 450 RPM to save gas...
These problems cause me to occasionally over-rev when starting out in first gear, or kill the engine! I've driven stick for 50 years, have several stick shift vehicles, but when you have no tach, a silent engine and a very low factory set idle, an aftermarket tach is a requirment!!