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Old 04-30-2009, 12:35 AM   #1
CTScott
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DIY - 2009 Cruise Control for $10, without pulling the steering wheel and airbag

This DIY came from the following thread, discussing the possibility of adding cruise control by simply adding the OEM cruise control stalk:

http://www.yarisworld.com/forums/showthread.php?t=16188

2009 Yaris are prewired for cruise control. To enable this functionality one may add the OEM stalk, but doing so requires the removal of the steering wheel and airbag. Also, the dealer price for the OEM stalk is ~$125.

After looking at the cruise control section of the service manual, I realized that the stalk's functionality (On/Off, -(Set), +(Resume), and Cancel) could be recreated using four switches and three resistors. Alternately, basic cruise control functionality (On/Off and Set) can be provided using two switches and one (or two) resistors.

Currently, it is believed that this will also work for 07-08 Yaris, but a wire will have to be connected to connector A21 of the ECM or Connector AD4 (which is located above the top of the fuse panel, just under the dash).

Note: For Manual Transmission equipped Yaris, the "Cruise Control Clutch Switch" is needed as well. This is a second clutch switch (there's already one called the "Clutch Start Switch"). The "Cruise Control Clutch Switch" connects to connector A29. Its part number is: 88280-14030 and it lists for ~$18.



Materials required:
4 - Switches (SPST, Normally Open, Momentary) (Digikey part number EG1900-ND, $2.44 each)
1 - 240 Ohm Resistor (Digikey part number 240QBK-ND, $.06)
1 - 390 Ohm Resistor (Digikey part number 390QBK-ND, $.06)
1 - 910 Ohm Resistor (Digikey part number 910QBK-ND, $.06)
~4ft - Wire, 20-24 AWG, 2 colors

I purchased the switches and resistors from Digikey (http://www.digikey.com/).





Procedure:

1. Make sure your car is pre-wired for cruise control:

Check the Combination Meter for the Crusie Control Lights:
Shining a flashlight to the right of the speedometer will make the two
cruise control icons visible if they are present. They will not illuminate,
but will look like the two below:



2. Remove the lower steering column cover:

Rotate the steering wheel all the way to either side, and remove the two screws:




Remove the screw by the steering wheel tilt lever:


Squeeze the lower steering column cover, by the seam between it and the upper, and gently pull down to remove it.


3. Identify the Cruise Control wires on Connector D3 (white connector at the base of the steering wheel next to the yellow connector): CCS (Blue wire in Pin 1) and ECC (Brown wire in Pin 3).




4. Chose a location to mount the switches. I mounted mine to the "push button start" cover to the right of the key switch. This location has a hole behind it approximately 1-5/8" in diameter. If using this location you must make sure that the back of the switches line up with this hole:

Switches mounted:


Hole behind cover:


Rear of cover (with two switches mounted):



5. Mount and wire switches:
Switches can be mounted in various positions, but wiring between them will be the same. Note that in the 4 switch example the leads of the 390 Ohm resistor are covered with heat shrink tubing to keep them from making contact with the other switch terminals.

4 Switch wiring:


2 Switch wiring (The two resistors could be replaced with a single 567-693 Ohm one) :



6. Connect wires from switch assembly to wires on connector D3.
Red wire from switches connects to blue wire of D3 Pin 1.
Black wire from switches connects to brown wire of D3 Pin 3.





7. Test Cruise Control functions:
On/Off function can be tested with the engine off and the ignition switch in the on position. Pressing the button once should illuminate the cruise control icon. Pressing it again should make the light go off:




The Set function requires that the car be moving at 25 MPH or greater. Pressing the Set switch at >25MPH will cause the SET light to illuminate.


Last edited by CTScott; 05-01-2009 at 10:20 PM. Reason: Add note about Cruise Control Clutch Switch for Manal Transmission
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Old 04-30-2009, 12:44 AM   #2
KCALB SIRAY
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very interesting, subscribed
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Old 04-30-2009, 01:08 AM   #3
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Originally Posted by CTScott View Post
To enable this functionality one may add the OEM stalk, but doing so requires the removal of the steering wheel and airbag.
Is there any way to install the OEM stalk without removing the steering wheel & airbag?
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Old 04-30-2009, 01:17 AM   #4
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Is there any way to install the OEM stalk without removing the steering wheel & airbag?
No. It mounts under them, and the connector for the spiral cable is buried under there as well. Removing them is not a huge deal, it just requires some caution and care to not pop the airbag or break the clockspring.
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Old 05-09-2009, 02:04 AM   #5
firemachine69
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No. It mounts under them, and the connector for the spiral cable is buried under there as well. Removing them is not a huge deal, it just requires some caution and care to not pop the airbag or break the clockspring.
Snapping the clockspring is a big concern. Very fragile piece. Airbag: not so much. Too many fail-safes built-in due to liability concerns.
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Old 05-11-2009, 09:05 PM   #6
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I'd like to do this mod to my '08 HB with no CC wiring or dash symbol. I'll run a wire from the ECM A21 connector @ position #40 then to the aftermarket on/off cruise switch.

My question is this: I'd like to have an LED light to indicate when the "cruise control" is "on." Where can I find a hot wire for the LED?
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Old 05-11-2009, 10:04 PM   #7
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Quote:
Originally Posted by expo2 View Post
I'd like to do this mod to my '08 HB with no CC wiring or dash symbol. I'll run a wire from the ECM A21 connector @ position #40 then to the aftermarket on/off cruise switch.

My question is this: I'd like to have an LED light to indicate when the "cruise control" is "on." Where can I find a hot wire for the LED?
The real cruise light is controlled by the combination meter, which gets the info about cruise mode over the CAN bus from the ECM, so there's no easy wire to connect the LED to.
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Old 04-30-2009, 01:19 AM   #8
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Is there a DIY for removing the steering wheel & airbag?
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Old 04-30-2009, 01:44 AM   #9
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Quote:
Originally Posted by MGargano View Post
Is there a DIY for removing the steering wheel & airbag?
Here you go
Attached Files
File Type: pdf steering wheel removal (leather).pdf (995.7 KB, 782 views)
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Old 04-30-2009, 01:45 AM   #10
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so you can do this with only 2 switches? on/off and set?
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Old 04-30-2009, 08:27 AM   #11
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so you can do this with only 2 switches? on/off and set?
Correct. That's what I did with mine. In any vehicle that I've had with cruise, I never find myself using the tap up/down or coast/resume, so I just went with two switches.
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Old 05-06-2009, 07:33 AM   #12
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Correct. That's what I did with mine. In any vehicle that I've had with cruise, I never find myself using the tap up/down or coast/resume, so I just went with two switches.
If you push once to turn the cruise switch on. Then turn off the car, and turn the car back on again. Is cruise still on?
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Old 05-06-2009, 08:37 AM   #13
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If you push once to turn the cruise switch on. Then turn off the car, and turn the car back on again. Is cruise still on?
No. It resets with the ignition.
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Old 05-06-2009, 11:33 AM   #14
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it a wired question but...
i understand the on/off buton is for turning the cruise controll on and off
so whats the set button does? why i need two buttons? any one can explain me how to work with cruise controll?
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Old 03-21-2011, 12:47 AM   #15
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Originally Posted by CTScott View Post
Correct. That's what I did with mine. In any vehicle that I've had with cruise, I never find myself using the tap up/down or coast/resume, so I just went with two switches.
Thanks for the great DIY...Im going to try it this week.... 2010 Yaris...Found the Icons for the Set & Cruise on the top left section of the Cluster panel.
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Old 03-22-2011, 05:11 PM   #16
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Thanks for the great DIY...Im going to try it this week.... 2010 Yaris...Found the Icons for the Set & Cruise on the top left section of the Cluster panel.
This worked out great! Had the job done in a hour...cost was under ten dollars..radio shack came threw with the buttons and resistors.

Thanks...
Attached Images
File Type: jpg 2011-03-22 15.15.37-1.jpg (19.6 KB, 228 views)

Last edited by saltwt; 03-22-2011 at 05:12 PM. Reason: added picture..
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Old 04-30-2009, 08:48 AM   #17
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In instruction #7, the picture shows that the car thought this mod was pretty "cool" and said so!
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Old 04-30-2009, 09:59 AM   #18
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http://www.allelectronics.com/make-a...-SWITCH/1.html

would be a nice switch, if it spring centers.. takes the place of two pushbuttons :)
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