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04-21-2009, 06:26 PM | #109 | |
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Quote:
Or you could add four momentary switches (On/Off, Set, Up, Down) to the dash like I am going to do to save on buying the stalk and on having to pull the airbag. |
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04-21-2009, 06:43 PM | #110 |
Drives: '08 5-door Join Date: Apr 2009
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Good luck with that - those functions on the stock switch work through resistors and involve the extremely expensive central engine computer (ECM). The resistors are the squiggly lines in the diagram. It's important to know the exact values to make it work right. A familiarity with Ohm's Law would help, too.
Last edited by Sir A.Y. Atoyot; 07-27-2010 at 05:01 PM. |
04-21-2009, 06:51 PM | #111 | |
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216 to 264 ohms for one between resume and on/off 351 to 426 ohms for the one between set and resume 819 to 1001 ohms for the one between set and cancel This is a standard way of having multiple inputs on a single wire. |
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04-21-2009, 07:10 PM | #112 | |
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Quote:
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04-21-2009, 07:29 PM | #113 |
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OK. My two button rig is connected. When I turn the ignition on and press my on/off switch the speedometer icon lights up. Now to throw on my dobuk and hit the road for the road test...
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04-21-2009, 08:57 PM | #114 |
It's the illusion you see
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PK: if you are going to make yourself a new set of switches... don't cannibalize your stalk... sell it to me :)
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04-21-2009, 10:15 PM | #115 |
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Worked like a charm!
I used tap splices onto pins 1 (blue) and 3 (brown) of D3. My test setup consisted of 2 feet of 2 conductor cable going to two parallel switches. The first is the On/Off switch which connects directly to the two wires. The second is the Set switch and has a 660 ohm resistor on the CCS line from the first to it. Here's the combination meter in the garage with the ignition on and the on/off button pressed once: Here's the meter with the Set button pressed at 35 MPH (and my foot off the gas): The Set button doubles as the - button, so each press would drop the speed by one MPH. When I pressed the On/Off button while CC was on, it would drop the lights and decelerate until I put my foot on the gas. So, at this point I have free cruise control (from parts lying around my office). Now I just have to find some switches that I like to button it up... |
04-21-2009, 10:26 PM | #116 |
thats awesome, you should make a step by step how-to with a link to the resistors to use, I would actually prefer this way
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04-21-2009, 10:57 PM | #117 |
Drives: '08 5-door Join Date: Apr 2009
Location: Surrey, BC Canada
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Very tidy - congrats to CTScott on getting the first practical results out of this discussion.
I'm not an electrical engineer - just a licensed mechanic. I have an aversion to hacking into the wiring on a near-new car that's still on warranty, but I can see my way clear now to acquiring the necessary bits to do it right. |
04-21-2009, 11:03 PM | #118 |
Will do tomorrow
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04-21-2009, 11:19 PM | #119 | |
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Quote:
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04-21-2009, 11:35 PM | #120 |
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That's correct. I was looking at the wrong blue when I typed that. When Alex checks his D3 connector (where I am 90% sure he'll just see the lonely horn wire), he should then check Pin 6 of AD4 to see if there is a wire there.
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04-21-2009, 11:50 PM | #121 | |
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Quote:
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04-22-2009, 12:03 AM | #122 | |
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Quote:
Resume picks up just the first resistor, so its resistor value is simply the value listed. Set picks up the first two, so I subtracted the value for Resume from total resistance measurement with Set pressed to get the second value. Cancel picks up all three, so I subtracted the value total resistance for Set from the total for Cancel to get the value of the third. |
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04-22-2009, 12:45 AM | #123 | |
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Quote:
216 to 264 ohms for one between resume and on/off 351 to 426 ohms for the one between set and resume 819 to 1001 ohms for the one between set and cancel By the way, you actually can't harm the EMC port with the wrong resistors, as the port can handle a direct short (as the on/off switch does) to infinite resistance (no buttons pressed). |
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04-22-2009, 01:12 AM | #124 |
so with the switches option do we still have to take off the airbag or just the stearing column cover?
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04-22-2009, 01:22 AM | #125 | |
Drives: '07 Yaris HB Join Date: Apr 2006
Location: Sudbury, Canada
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Quote:
I am going to be putting a new headlight stalk on tomorrow so I will check my '07 liftback to see if the wires are there. |
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04-22-2009, 01:45 AM | #126 |
ill have to look next time i work on my car. when my projectors get here... also gotta try to do easy fix on my back bumper :( anyway ill check my 07 hatch when i can..
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