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

[CTScott]

That looks fine for a test setup. Snap a pic of your clutch switch wiring at the fuse box.

[i-trans]

this is my clutch switch wiring in the fusebox

[CTScott]

You're in the right place. The blue wire needs to have +12V to it in order for cruise to be enabled.

[i-trans]

the blue wire have +12v when i release the clutch in link with the white wire?

because i don't have any power on my clutch switch.

my wire are clutch switch +/- to fusebox (white and blue wires )

[CTScott]

Originally Posted by i-trans

the blue wire have +12v when i release the clutch in link with the white wire?

because i don't have any power on my clutch switch.

my wire are clutch switch +/- to fusebox (white and blue wires )

Correct - When the clutch is not pressed the blue gets 12V from the white and when it is pressed it opens and the blue has 0V.

[i-trans]

and this cruise control have a fuse anywhere, in case of shortcut ??
what's happen if utilise N.C switch for testing purpose?
in exemple the first switch are N.C (pin 40 to this switch) , and for the second switch i utilize an N.O switch?
the n.c switch when i push on it its "ON" when i repress on it its "off".
and the second switch its "set"

[CTScott]

Originally Posted by i-trans

and this cruise control have a fuse anywhere, in case of shortcut ??
what's happen if utilise N.C switch for testing purpose?
in exemple the first switch are N.C (pin 40 to this switch) , and for the second switch i utilize an N.O switch?
the n.c switch when i push on it its "ON" when i repress on it its "off".
and the second switch its "set"

No fuse - This is just an analog input to the ECM.

A NC switch won't work. The ECM expects to see the input float and then get pulled down to a specific voltage range for it to register. I have reverse engineered the Toyota diagnostics CAN Bus comm to read the cruise control switch state from the ECM, so I can watch how the ECM responds to the inputs.

Have you measured your resistors to see exactly what they read resistance wise. Sometimes you can get a batch that are really at the end of their tolerance band.

[rob1005]

I just purchased the clutch switch from Toyota but it did not include any connector or wires. It just has two prongs. How would I go about attaching two wires to the prongs?

Toyota also gave me screws which are too big for the cruise stalk. Which screws do I need?

Thanks for all your help.

[CTScott]

Originally Posted by rob1005

I just purchased the clutch switch from Toyota but it did not include any connector or wires. It just has two prongs. How would I go about attaching two wires to the prongs?

Toyota also gave me screws which are too big for the cruise stalk. Which screws do I need?

Thanks for all your help.

On the clutch switched that I ship to people with 06-08's, I solder wires to the two pins and then individually heat shrink them, and then heat shrink over both as a strain relief. You could also use some very small female spade terminals, if you are not comfortable with soldering to them.

The screws are M5-.80

[packetrace]

Is there a DIY on how to remove the steering wheel and the airnag ?

[CTScott]

Originally Posted by packetrace

Is there a DIY on how to remove the steering wheel and the airnag ?

Yes. My complete DIY has it:

http://www.yarisworld.com/forums/showthread.php?t=33750

[packetrace]

So...I unscrew the 2 side screw..and I pull the whole steering wheel...and It will pop off ?

OBVIOUSLY i disconnect the battery hahaha!

[CTScott]

Originally Posted by packetrace

So...I unscrew the 2 side screw..and I pull the whole steering wheel...and It will pop off ?

OBVIOUSLY i disconnect the battery hahaha!

Section 1, specifically 1.1.1...

[packetrace]

Yes I know..but I mean...I pull on the whole steering wheel...or only the middle part where there is the toyota emblem ?

[CTScott]

Originally Posted by packetrace

Yes I know..but I mean...I pull on the whole steering wheel...or only the middle part where there is the toyota emblem ?

You are only removing the airbag (which is the center portion of the steering wheel), unless you wish to drill the lower steering wheel cover off of the car, or are replacing it with a pre-holed one.

[rob1005]

Just finished installing and works perfectly. Wish the 07s had a cruise light on the dash though. Oh well, thanks for the good DIY Scott.

I was wondering how you managed to feed the clutch switch wires through the firewall. I gave up because of limited space and just fed the wires back through the passenger side grommet.

[CTScott]

Originally Posted by rob1005

Just finished installing and works perfectly. Wish the 07s had a cruise light on the dash though. Oh well, thanks for the good DIY Scott.

I was wondering how you managed to feed the clutch switch wires through the firewall. I gave up because of limited space and just fed the wires back through the passenger side grommet.

With the giant grommet on the driver's side, where the main cable harness goes through, there are two small nipples that you can poke through. You have to first go through with something sharp, and then the wire will feed through.

[Ratz]

For DIY cruise control

When drilling 1-1/8” opening in the steering wheel trim/cover, I used small square of black winds surfing jacket neoprene (just to cover up guts of the switch) and then used sliced windshield washer hose to finish the edge. What can I say , my wife’s attention to details is admirable.