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

[CTScott]

Originally Posted by lily

I need some help from this install.

Got an '07 Yaris HB, base model, auto.

I did the 2 button setep from CTScott's PDF write-up.

I cannot get the 'cruise' to work after this mod.

What I did was soldered two resistors in series: a 270 and 380 for a 650 resistor. Then soldered the series as shown on the PDF for the 2 button setup.

I ran a wire to the PIN 40 on the ECU and grounded the other wire, but still nothing.

My questions are:

How far does the wire going into the ECU have to "stick" out to touch inside the ECU?........I have maybe 2 or 3 wires that stuck out from the harness, is that enough "contact" to make this work?

I grounded the other wire by just screwing/sandwiching into a grounded source on the driver's kick panel, <<< is this "good grounding"???

Is soldering a good idea to connect the series? <<< I soldered because the pins behind on the push buttons I got from Radio Shack were too small to work on.

I hope I am clear about my questions. It has been raining here so I would like some help soon so I could use this feature on my upcoming road-trip.

Thank you for your time.

You really need to have good connection to the ECM pin and realllllly want it to still be waterproof, so using one of the correct pins for the connector is a good idea.

Soldering the resistors is definitely the way to go. In the example pictures of the two switch methods I just put them together to show the layout, but didn't solder the examples.