DIY Cruise Control on 07-08 Yaris (step by step)

[CTScott]

Originally Posted by goat1of2

There is a part number on the lever but it says "Tyco 90980-12589"

Tried googling it but nothing yet.

Tyco, Sumitomo, etc. make many custom connectors for Toyota, which you can't purchase from anyone, except the manufacturer or Toyota.

[Sodium Duck]

I also did that with the rubber thing in the connector, too. Just take a needle and push it back out the right way, it'll go. I had a lot of trouble too with that stupid connector. That black sliding piece wouldn't go back on, and after 10 minutes of fudging around with it, I just took it off and put the gray piece back on and slid it into place.

Don't worry - your car is not dead.

[goat1of2]

Originally Posted by Sodium Duck

I also did that with the rubber thing in the connector, too. Just take a needle and push it back out the right way, it'll go. I had a lot of trouble too with that stupid connector. That black sliding piece wouldn't go back on, and after 10 minutes of fudging around with it, I just took it off and put the gray piece back on and slid it into place.

Don't worry - your car is not dead.

Thank you, Mr (or Ms) Duck, for your kind words of sympathy. The boyfriend came home after work and somehow managed to reinstall the piece I'd broken and superglued back together. Car now runs. PHEW! Back to square one.

He tried for quite some time to work out that plug using a pin, a thicker piece of wire, and just some general cussing. He says he can see the plug down in there and it is kind of sideways, allowing a wire to go right through to the other side, without piercing the plug.

He wants to use a tiny drill bit and DRILL the plug to bits. I say we don't know what the heck is inside that connection hole, so we risk ruining a 500.00 component! We might just smear the material the plug is made of all up inside there, making a worse mess. We might somehow screw up the neighboring connector, which has a wire already in it.

I want to try leaving the plug in and just pushing a single-strand AWG 20 wire through the connector and seeing if THAT will make a good-enough connection. A wire of that description does go right through.

So, do we try it his way or my way? Or, do I just cover the hole left by the missing plug with electrical tape and pronounce this vehicle PERMANENTLY WITHOUT CRUISE CONTROL.

I hope at least you all are getting a good laugh out of this!

[CTScott]

Originally Posted by goat1of2

Thank you, Mr (or Ms) Duck, for your kind words of sympathy. The boyfriend came home after work and somehow managed to reinstall the piece I'd broken and superglued back together. Car now runs. PHEW! Back to square one.

He tried for quite some time to work out that plug using a pin, a thicker piece of wire, and just some general cussing. He says he can see the plug down in there and it is kind of sideways, allowing a wire to go right through to the other side, without piercing the plug.

He wants to use a tiny drill bit and DRILL the plug to bits. I say we don't know what the heck is inside that connection hole, so we risk ruining a 500.00 component! We might just smear the material the plug is made of all up inside there, making a worse mess. We might somehow screw up the neighboring connector, which has a wire already in it.

I want to try leaving the plug in and just pushing a single-strand AWG 20 wire through the connector and seeing if THAT will make a good-enough connection. A wire of that description does go right through.

So, do we try it his way or my way? Or, do I just cover the hole left by the missing plug with electrical tape and pronounce this vehicle PERMANENTLY WITHOUT CRUISE CONTROL.

I hope at least you all are getting a good laugh out of this!

I would avoid the drill bit route, as that has the potential to do unnecessary damage. The cavity that the plug is stuck in is rectangular, so it is fairly easy to have it round plug end of sideways in there. The drill bit will probably just chew up the soft sides of the cavity, rather than the plug. The key with the plug being wedged is to get something to hook deep enough into the plug to allow it to be pulled.

[rcspott]

Goat,

You have a Private Message

[lily]

Originally Posted by lily

well, i re-wired new push buttons and added a new single 620 resistor to the 2-button setup but still no avail.

i'm thinking that the connection to PIN 40 is not so good.

how did you all establish "connection" to this PIN 40?

did you just simply push a strand of wire through the harness or actually got one of those little pins? (i just pushed a wire through the harness because i cannot figure out how to completly disassemble it).

can the head piece of harness be taken apart further? <<< i have take it off the ECU/ECM and the taken the little rubber plug off but cannot figure out if the head piece of the harness can be taken apart further.

Thank you.

well, still no cruise yet.

my main question is about how to take off the ECU harness.

i have gone as far as "unlocking" the harness via the "white clip" like the pictures from the previous posts.

but does the harness come off even further??? <<< can someone please take a pic of the "full breakdown" of the harness???

what i did was pretty much just "unlocked" the harness via the "white clip" and slid a wire through PIN 40. <<< this i believe somehow is not "good enough" contact to the ECU itself.

i think this is what I'm stuck on, because i cannot establish a good contact from the wire to the ECU. i have the little connector pin, but just don't know how to break down the ECU harness to fit it onto PIN 40 of the harness.

HELP PLEASE.

[CTScott]

Originally Posted by lily

well, still no cruise yet.

my main question is about how to take off the ECU harness.

i have gone as far as "unlocking" the harness via the "white clip" like the pictures from the previous posts.

but does the harness come off even further??? <<< can someone please take a pic of the "full breakdown" of the harness???

what i did was pretty much just "unlocked" the harness via the "white clip" and slid a wire through PIN 40. <<< this i believe somehow is not "good enough" contact to the ECU itself.

i think this is what I'm stuck on, because i cannot establish a good contact from the wire to the ECU. i have the little connector pin, but just don't know how to break down the ECU harness to fit it onto PIN 40 of the harness.

HELP PLEASE.

I just put together a quick DIY on removing the connector, pulling the plug, and inserting the pin:

http://www.yarisworld.com/forums/sho...571#post451571

[goat1of2]

Originally Posted by lily

well, still no cruise yet.

i think this is what I'm stuck on, because i cannot establish a good contact from the wire to the ECU. i have the little connector pin, but just don't know how to break down the ECU harness to fit it onto PIN 40 of the harness.

HELP PLEASE.

Lily,
I think the one thing which no one has explicitly stated yet is that you MUST have the special Toyota "repair terminal" to make this mod work for the 07-08 models. Just shoving any ole wire through the pin 40 hole doesn't cut the mustard. Did anyone get it to work that way?

[CTScott]

Originally Posted by goat1of2

Lily,
I think the one thing which no one has explicitly stated yet is that you MUST have the special Toyota "repair terminal" to make this mod work for the 07-08 models. Just shoving any ole wire through the pin 40 hole doesn't cut the mustard. Did anyone get it to work that way?

A few people have done it with the "ole wire" method. It certainly can work that way, but will be more prone to stop working and to potentially let moisture get to where it shouldn't.

[lily]

thank you CTScott for the write up.

i will give it another try this coming weekend and report back.

tune in...

[fratzica]

So this is what I found under the steering column in my EU spec 08` Yaris D-4D.
I have the brown and blue wires but both in the wrong pin locations.
Sorry for the blueish color, i took the photos with my cellphone.

[CTScott]

Originally Posted by fratzica

So this is what I found under the steering column in my EU spec 08` Yaris D-4D.
I have the brown and blue wires but both in the wrong pin locations.
Sorry for the blueish color, i took the photos with my cellphone.

Those are for the steering wheel radio controls.

[fratzica]

Damn...
I really need the cruise control function because I drive a lot outside town and I get tired of holding the accelerator pedal at a certain speed. Probably got used to the cruise control because my last car had this function. Just yesterday i drove almost 1000 km or 620 miles and had to take a 1 hour nap on the return trip. I know 620 miles is not a lot in the US due to your highway system, but in my country we have only 2 (yes, two) highways, most of the roads having one lane for each direction only.
Anyway.. I`ll try to find a cheaper solution :)
Thank you Scott for your help!

[CTScott]

Originally Posted by fratzica

Damn...
I really need the cruise control function because I drive a lot outside town and I get tired of holding the accelerator pedal at a certain speed. Probably got used to the cruise control because my last car had this function. Just yesterday i drove almost 1000 km or 620 miles and had to take a 1 hour nap on the return trip. I know 620 miles is not a lot in the US due to your highway system, but in my country we have only 2 (yes, two) highways, most of the roads having one lane for each direction only.
Anyway.. I`ll try to find a cheaper solution :)
Thank you Scott for your help!

You might want to contact the company in the link below. They are based in Denmark and make cruise control kits for various vehicles that can even use the OEM cruise control stalk. They definitely make one for the Auris D-4D, so they should have one for the Yaris D-4D as well.

http://www.el-pas.com/products_ecruise.htm

[fratzica]

Just sent them an e-mail. Fingers crossed :D

[CTScott]

Originally Posted by fratzica

Just sent them an e-mail. Fingers crossed :D

Here's another potential option; I believe that The Rostra cruise control kit, which is used as the dealer added cruise control on US Yaris, would work as well.

I just noticed in the EWDs for the D-4D, that the wiring to the accelerator pedal (connector A20) is the same as for our US cars. The Rostra kit connects to the accelerator pedal connector, the neutral safety switch (AT) or tach wire (MT), the vehicle speed sensor wire, and the brake switch. So, I think it would work fine on your D-4D.

Here's a place that sells the Rostra kits for $249:

http://www.thecruisecontrolstore.com...g/X380183/0003

[fratzica]

thecruisocontrostore.com ships only in the US and Canada.. Let`s see what the people from el-pas.com say.

[weaver615]

Ok Guys I tried this MOD today and it doesn't work. I used 2 NO Switches and 1 680ohm 1/2 5% cfr resistor, grounded to chasis at the drivers side door and hot to PIN 40 of the ECM. Jumpered the Clutch switch and took it for a test drive. NADA.
I'm wondering if the resistor may be the problem or if the problem could be that I used 20 Gauge solid and not stranded wire, (shouldn't make a difference I wouldn't think), to build the circuit and run the hot and ground. every thing checked and doubled checked, any Ideas? BTW, I am using the 2 switch method not the 4.