DIY Cruise Control FAQ (2006-2010 Yaris)

[CTScott]

Originally Posted by magnum23

It have an Auto transmission.

OK. I just noticed that you said that you have a 2009 Sedan and the wiring was in place. So, you had the blue and brown wires, not just the black horn wire on connector D3 (the one on the bottom of the steering column)?

[magnum23]

Yes just double checked and it have the 3 wires in place.

[CTScott]

Originally Posted by magnum23

Yes just double checked and it have the 3 wires in place.

OK - Just to triple check - We're talking about the connector next to the yellow one on the left side of this picture?




If that's good, look at the part number on the ECM (The silver box on the passenger side of the firewall) and post it. I don't know if anyone from PR has tried the cruise mod, and I think that you might get a different version of the ECM, from what we get here.

[magnum23]

Yes that is good, mine is exactly as the picture you posted, where exactly is this part, (The silver box on the passenger side of the firewall)?

[CTScott]

Originally Posted by magnum23

Yes that is good, mine is exactly as the picture you posted, where exactly is this part, (The silver box on the passenger side of the firewall)?

Pop the hood and look to the left:

[magnum23]

Mine is 89661-52J50

[CTScott]

Originally Posted by magnum23

Mine is 89661-52J50

OK - That's the same as my 09 LB, so the ECM is fine.

Do you have a volt meter and know how to use it?

[magnum23]

I dont have one accesible right now? But why I should check? What do you think is the problem?

Thanks in advance.

[CTScott]

Originally Posted by magnum23

I dont have one accesible right now? But why I should check? What do you think is the problem?

Thanks in advance.

If you measure the voltage between the blue and brown wires (with the ignition in the on position) at the connector under the dash, you should see 12V. If you hold the on/off switch it should drop to 0V and then pop back to 12 when you release it. That's a good starting point.

[teddy]

Hey CTScott, can you take a look at this for me? Since Toyota Canada is "recommending" the Rostra CC units be removed for a full refund, I think I'd like to take the opportunity to install the OEM CC unit.

Here is a list of the parts I've compiled which I should need. It's for a Canadian 2008 AT.

https://spreadsheets.google.com/ccc?...thkey=CN6w_OoF

Before I go ahead and order I'd like to make sure I'm ordering the right stuff!

Cheers

[Shinare]

Originally Posted by teddy

... Toyota Canada is "recommending" the Rostra CC units be removed for a full refund...

Yikes, thats the kind of CC I have in my yaris from the dealership. Any reason its not good to have?

[CTScott]

Originally Posted by teddy

Hey CTScott, can you take a look at this for me? Since Toyota Canada is "recommending" the Rostra CC units be removed for a full refund, I think I'd like to take the opportunity to install the OEM CC unit.

Here is a list of the parts I've compiled which I should need. It's for a Canadian 2008 AT.

https://spreadsheets.google.com/ccc?...thkey=CN6w_OoF

Before I go ahead and order I'd like to make sure I'm ordering the right stuff!

Cheers

That's it. By the way, within about a week I will have the ECM and Connector D3 pins for sale for less that half of that.

[teddy]

Originally Posted by CTScott

That's it. By the way, within about a week I will have the ECM and Connector D3 pins for sale for less that half of that.

Awesome!! I'll have to contact you for them soon. I'm going to get the dealership to remove the Rostra unit at my next scheduled maintenance appt, in a month or two. I'll order what I need after that.

[magnum23]

I will try that tomorrow morning and post the results, thanks for your help, looking forward to that cruise control!!!!

[magnum23]

I tried to get a read between the blue and brown wires with a digital multimeter, but It dont display any voltage, Im not really sure but I think Im doing it right. I used a Craftsman digital multimeter, put the knob in the VDC section, in the 20 value, and the cables the black in com, and the red in V, mA. I tried in the end of the plug and directly to the cable and nothing.
What Follows?
Thanks in advance.

[CTScott]

Originally Posted by magnum23

I tried to get a read between the blue and brown wires with a digital multimeter, but It dont display any voltage, Im not really sure but I think Im doing it right. I used a Craftsman digital multimeter, put the knob in the VDC section, in the 20 value, and the cables the black in com, and the red in V, mA. I tried in the end of the plug and directly to the cable and nothing.
What Follows?
Thanks in advance.

You have the meter setup properly. The important thing is to make sure that the metal tips of the meter probes are actually touching the metal of the connector pins. You want to go in from the side where the blue and brown wires enter the connector.

Also, make sure you have the key in the ON position when taking the measurement.

[magnum23]

Ok, I checked again and there is no voltage reading, I tried the same with another plug in the wiring and got a 12v reading, I think there is no voltage getting to the CC switch thorugh the plug.

[CTScott]

Originally Posted by magnum23

Ok, I checked again and there is no voltage reading, I tried the same with another plug in the wiring and got a 12v reading, I think there is no voltage getting to the CC switch thorugh the plug.

OK. The next thing to check is if the ECM pin is actually there for the blue cruise control wire. You can remove the connector (you press in on the gray part and then lift it to release the connector). If you look in the hole side of the connector, you will see that some holes have metal visible and others do not. Check the pin circled below (note that the connector in this photo does not have visible metal, so it is lacking the pin for cruise control):

Conn A21 - Photo.jpg