DIY - 2009 Cruise Control for $10, without pulling the steering wheel and airbag

[trunkout]

Originally Posted by CTScott

I believe that someone else found that as well. That means that the 09 Sedans are like the 07-08 liftbacks, which means that you will need to run the wire yourself from the ECM to the switches.

I have an 09 sedan! The wires are there under my steering wheel!
I will post pics tomorrow on the install......

[1972Dart]

Ok I have a 2007 Yaris four door. This looks like a cool mod but i do have one question. Do you not have to have the cruse control vacuum actuator to hold the throttle cable down when you hit the set button? Or is the computer using the throttle position sensor and locking the voltage in at that point? I hope this makes since.

[CTScott]

Originally Posted by 1972Dart

Ok I have a 2007 Yaris four door. This looks like a cool mod but i do have one question. Do you not have to have the cruse control vacuum actuator to hold the throttle cable down when you hit the set button? Or is the computer using the throttle position sensor and locking the voltage in at that point? I hope this makes since.

Vacuum-based cruise control disappeared with cable throttles. The Yaris is drive-by-wire, where the accelerator is just an input the the ECM and it in turn drives the throttle motor. Because of this cruise control becomes a simple set of switch inputs to the ECM (ON/OFF, Set, etc.) and the ECM does all of the rest of the work.

So, for your 2007 (and any US/Canada Yaris 2006 to present) what is documented in this mod, or for a few more dollars adding the OEM stalk will give you cruise.

This DIY discusses the OEM stalk method. I carry all of the parts for doing that route for quite a bit less than dealer pricing.

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

[trunkout]

That was so easy it's scary. Ten minutes tops. All parts ready at radio shack. 8 bucks.

[CTScott]

Originally Posted by ltlblkcar

So I just wired the black wire from the d3 connector in with the red and blue wires. The horn when pushed turns on cc but the switch still doesn't do anything. Am I missing a ground or a power wire for this?

Post a picture of how you wired your switches and your connections to D3. It does sound like you have an issue, as the horn pad grounds to black wire to make the horn honk.

[62Fender]

Hope you don't mind a question from a non-Yaris owner?

Great thread! I imagined a ~$10 mod would look like it but it's every bit as aesthetic as functional. I installed an oem kit stalk and it's almost in the way compared to dash buttons.

The basic Scion TC "CRUISE" light does not have a "SET" indicator. Is it possible to add a single LED as a "SET" indicator without having to tap the CAN circuit?

[CTScott]

Originally Posted by 62Fender

Hope you don't mind a question from a non-Yaris owner?

Great thread! I imagined a ~$10 mod would look like it but it's every bit as aesthetic as functional. I installed an oem kit stalk and it's almost in the way compared to dash buttons.

The basic Scion TC "CRUISE" light does not have a "SET" indicator. Is it possible to add a single LED as a "SET" indicator without having to tap the CAN circuit?

No. For set you would need the CAN message from the ECM.

[62Fender]

Cool. My ECU diagram lists CAN L and CAN H. Would a voltage test during cruise "set" indicate which CAN could be tapped for the hot side of the LED? Opposite side of LED to ground?

[CTScott]

Originally Posted by 62Fender

Cool. My ECU diagram lists CAN L and CAN H. Would a voltage test during cruise "set" indicate which CAN could be tapped for the hot side of the LED? Opposite side of LED to ground?

The CAN bus is a high speed computer network. You would need an intelligent device to decode the messages and light the LED when the appropriate message comes across.

What year is your TC?

[62Fender]

Are we talking wave form instead of voltage? I probably better stick with the basic cruise light.

The TC is a 2008 'spec'. Thanks for the info.

[CTScott]

Originally Posted by 62Fender

Are we talking wave form instead of voltage? I probably better stick with the basic cruise light.

The TC is a 2008 'spec'. Thanks for the info.

Even more than wave form - We are talking about an encoded message within a stream of pulses. I actually have an enhanced version of my cruise control indicator module that I developed, which can drive separate LEDs for ON and SET. I haven't offered it for sale as of yet, as it is a $50 device, as opposed to the $25 one that just handles reading "ON" via the feed between the switch and the ECM. Set is more complex, as you really need the message feedback from the ECM to know that all conditions were met to allow the ECM to set it.

[62Fender]

Thanks for the info. Any plans to make the 'set' indicator available separately?

[CTScott]

Originally Posted by 62Fender

Thanks for the info. Any plans to make the 'set' indicator available separately?

I can easily do that. It is just a matter of not having the second LED for "ON".

[62Fender]

Dear CTScott,

Was wondering if this idea could be applied to remote audio controls, (ie seek/volume) without having to fork for the steering wheel upgrade? My head unit has the wires that typically go to the clockspring. The volume dial has to be turned too many times to be useful. I'd like to have an up/down rocker-type control if possible.

I thought about using two rockers for volume and seek plus a momentary switch for the "mode" selector.

Is this possible without adding resistors to the switches or does the head unit require variable voltages to know which switch is being pushed?

[CTScott]

Originally Posted by 62Fender

Dear CTScott,

Was wondering if this idea could be applied to remote audio controls, (ie seek/volume) without having to fork for the steering wheel upgrade? My head unit has the wires that typically go to the clockspring. The volume dial has to be turned too many times to be useful. I'd like to have an up/down rocker-type control if possible.

I thought about using two rockers for volume and seek plus a momentary switch for the "mode" selector.

Is this possible without adding resistors to the switches or does the head unit require variable voltages to know which switch is being pushed?

The headunit would require resistors for each function. If you have an aftermarket one, some of those use more complex methods than resistance.

[andreas14]

can this work with vitz 2005 2SZ-FE SMARTKEY(KEYLESS ENTRY START BUTTOM) NO KEY AND IGNITION SWITCH HOLE

[CTScott]

Originally Posted by andreas14

can this work with vitz 2005 2SZ-FE SMARTKEY(KEYLESS ENTRY START BUTTOM) NO KEY AND IGNITION SWITCH HOLE

No. There is no easy cruise solution for the Vitz.

[CTScott]

Originally Posted by Dohsh77

After all this years did any one find how to install cruis control for yaris if the measure between pin 40 and ground is 0 volt

If pin 40 is zero volts, then your only option is an aftermarket solution, such as the original Rostra kits (the kits with the non-OEM looking stalk).