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

[lily]

ok now...i need some help.

well, i've installed a wire with the connector tip, into PIN 40 of the ECU harness.

i've also made the 2-button style controller, just as the illustrations from the previous posts.

and...still no avail.

i have tested out the on/off buttons with a DMM and it reads about 5.24 when pressed and the ignition turned to 'on'. having the key to 'on' and no pressing the button, i get 0 on the DMM.

I NEED HELP TROUBLESHOOTING!

i think that the wire into PIN 40 is not contacting inside the ECU or the buttons are no good. i have the radio shack 275-1548 SPST 'Mini' buttons with a 125 VAC, 0.3amp @ 50 VDC. <<< ARE THESE BUTTONS GOOD ENOUGH TO MAKE THIS WORK???

i've already checked the single resistor to be about 634. <<< Is this OK?

out of ideas no, HELP!!!

[CTScott]

Originally Posted by lily

ok now...i need some help.

well, i've installed a wire with the connector tip, into PIN 40 of the ECU harness.

i've also made the 2-button style controller, just as the illustrations from the previous posts.

and...still no avail.

i have tested out the on/off buttons with a DMM and it reads about 5.24 when pressed and the ignition turned to 'on'. having the key to 'on' and no pressing the button, i get 0 on the DMM.

I NEED HELP TROUBLESHOOTING!

i think that the wire into PIN 40 is not contacting inside the ECU or the buttons are no good. i have the radio shack 275-1548 SPST 'Mini' buttons with a 125 VAC, 0.3amp @ 50 VDC. <<< ARE THESE BUTTONS GOOD ENOUGH TO MAKE THIS WORK???

i've already checked the single resistor to be about 634. <<< Is this OK?

out of ideas no, HELP!!!

The switches are your issue. Those are normally closed (N.C.) switches, so they act like they are pressed until you press them, then they act like they are not. Radio Shack does not do a good job with labeling their switches.

You need normally open (N.O.) ones. 275-1571 are mini N.O. ones for example.

[lily]

AH HA!!!!!!!!!!!!!!!

upon further 'inspecting' the descriptions on the baggy, it does indeed say (in very fine print) "N.C. contacts". <<< I assume this is the "normally closed" which i need "normally open".

tomorrow i will have to go get the ones stated then.

i appreciate the help CTScott.

tune in...

[lily]

well...i went and got two different buttons (radio shack part number: 275-0644).

installed it and IT WORKS!!!

YAY...THANKS TO CTScott and others for their pics.

turned out that i had the wrong buttons this whole time. when i initially went to buy the buttons, i swore i thought i saw them as "N.O." but i guess i was reading too fast and was rushing it.

thanks again, now with cruise, its a breeze on them long road trips.

happy driving!!!

[CTScott]

Originally Posted by lily

well...i went and got two different buttons (radio shack part number: 275-0644).

installed it and IT WORKS!!!

YAY...THANKS TO CTScott and others for their pics.

turned out that i had the wrong buttons this whole time. when i initially went to buy the buttons, i swore i thought i saw them as "N.O." but i guess i was reading too fast and was rushing it.

thanks again, now with cruise, its a breeze on them long road trips.

happy driving!!!

Nice! I'm always glad to hear the success stories.