Can we do this? (aka The DIY Cruise Control Thread) - Page 28 - Toyota Yaris Forums

rhaagusa · 05-13-2010, 05:01 PM

Got it. Doesn't look to hard. With gratitude, RH

yarismadness · 11-26-2010, 07:30 PM

Guys,

I had I idea, and i need your opinion before trying it.

The yellow wire on the clutch switch that blocks the start (i am talking about the one on the bottom, not the additional we should add to stop the cruise), has normally (when released) 12V, high impedance (my guess is a pull up resistor inside the ECU). when pressed (the clutch needs to go to the bottom), that line goes near 0V (pulled down by the starter relay coil).

What if we sense that in order to stop the cruise? For example, a mosfet transistor will do the job perfectly.

The problem: the cruise will disable ONLY if the clutch is COMPLETELY pressed. What will happen during the clutch travel?
Cheers!

CtrlAltDefeat · 11-26-2010, 08:59 PM

Quote:

Originally Posted by yarismadness

Guys,

I had I idea, and i need your opinion before trying it.

The yellow wire on the clutch switch that blocks the start (i am talking about the one on the bottom, not the additional we should add to stop the cruise), has normally (when released) 12V, high impedance (my guess is a pull up resistor inside the ECU). when pressed (the clutch needs to go to the bottom), that line goes near 0V (pulled down by the starter relay coil).

What if we sense that in order to stop the cruise? For example, a mosfet transistor will do the job perfectly.

The problem: the cruise will disable ONLY if the clutch is COMPLETELY pressed. What will happen during the clutch travel?
Cheers!

I'm not an expert but I'm pretty sure the engine will rev up. disengaging the clutch will slow the car, which the ecu will see and will give it more gas to try to maintain speed. most of the time you do not floor the clutch (which would be required for this to disengage the cruise). I personally would not like this solution...

CTScott · 11-26-2010, 10:39 PM

^Exactly. The starting clutch switch and the cruise clutch switch have exactly opposite purposes. The starting one is a "safety" which wants to see the clutch fully depressed and the cruise one cancels cruise mode to prevent revving as soon as the clutch is touched. The OEM clutch switch is under $20, so it's really not worth looking for an alternative solution.

teddy · 01-15-2011, 01:46 PM

How is everyone running the wire from D3 to the ECM connector A21?
Last night I tried to follow the conduit of wires running from the ECM in the engine bay without much luck. I didn't want to have to rip apart the engine bay to find out where it goes. I really feel like I'm missing something silly!

CTScott · 01-15-2011, 02:29 PM

Quote:

Originally Posted by teddy

How is everyone running the wire from D3 to the ECM connector A21?
Last night I tried to follow the conduit of wires running from the ECM in the engine bay without much luck. I didn't want to have to rip apart the engine bay to find out where it goes. I really feel like I'm missing something silly!

The easiest way is to enter the rubber grommet above the ECM or the one below it (which is actually the grommet around the AC drain hose). Then, once you are through the firewall on the passenger side, you can bring the wire across to the driver's side.

mgoldhawk · 03-14-2011, 04:14 PM

Would I be able to fit cruise control to my Yaris using the same method? I have a 2001 5door hatchback...

CTScott · 03-14-2011, 04:28 PM

Quote:

Originally Posted by mgoldhawk

Would I be able to fit cruise control to my Yaris using the same method? I have a 2001 5door hatchback...

No. 1999-2005 Yaris used a cable throttle, rather than an electronic one like 2006 and newer ones have. So, 1st gen Yaris require an electro-mechanical cruise control system.

mudnuri · 11-29-2013, 10:49 PM

Quote:

Originally Posted by MadMax

Actually, I thought I had factory cruise control but that sounds like what I have, which I now suspect is a Rostra Precision Controls Inc. aftermarket set-up...does it look like this?

Plus, if that is aftermarket, what does the factory set-up look like?

BTW, the Rostra has been discussed before...

I put that CC in my '09 at 4000 miles and used it with fairly good results for a while.

At about 73000 miles it gave me full throttle and tried to kill us!

I turned the key off and stopped on the side of the road to change my underwear.

When I restarted the car it reved again.

Thinking it was just a fluke,

I disconnected the battery, waited, reconnected the battery and then drove it without issue to 97000 miles when I started getting throttle codes and car going into limp mode at random.

Last Monday the damn thing tried to rev agian!

Removed death trap Rostra junk and all is fine.

Now I have added the new stock you are all using...

Still need to add a few wires to the ECM plugs as my Yaris is a base mod.

If you see one of these old Rostra Aftermarket stocks RUN!

They were recalled but I never did get my cash back.

Update: As soon as I added the clutch switch it all worked great. I can set CC as low as 23 mph (speed as read by ScanGuage from ECM)

Paulee · 11-09-2015, 09:49 PM

Hey guys. Got myself an 09 Yaris recently and want to add the cruise. Ordered the OEM stalk from China and was wondering if I will need a clutch switch too. I know the guide says I do but shouldn't the car already have one? havent tried starting it without pressing the clutch in (force of habit) but the switch should prevent the car from rolling forward on the starter no?

apologize in advance if this was already covered elsewhere.

-Paul

Secretblend · 11-10-2015, 12:04 AM

Quote:

Originally Posted by Paulee

Hey guys. Got myself an 09 Yaris recently and want to add the cruise. Ordered the OEM stalk from China and was wondering if I will need a clutch switch too. I know the guide says I do but shouldn't the car already have one? havent tried starting it without pressing the clutch in (force of habit) but the switch should prevent the car from rolling forward on the starter no?

apologize in advance if this was already covered elsewhere.

-Paul

It does have a switch that tells the car you are pressing the clutch all the way in. It is not same switch that you would need to install that tells the car your clutch is all the way out.

the two switches would be on opposite side of clutch. If clutch is fully engaged the one switch would be used. If clutch is not engaged at all, other switch would be used. If clutch is halfway between then both switch would not be used.

Paulee · 11-10-2015, 12:08 AM

thanks. since posting I went through all the pages and some associated links. Think I have a good grip on what to do. just waiting for my stalk to arrive. might skip the clutch switch for now and drive around it. sounds like I dont have to dig under the dash and engine bay if I do save it for never.

Secretblend · 11-10-2015, 12:13 AM

Quote:

Originally Posted by Paulee

thanks. since posting I went through all the pages and some associated links. Think I have a good grip on what to do. just waiting for my stalk to arrive. might skip the clutch switch for now and drive around it. sounds like I dont have to dig under the dash and engine bay if I do save it for never.

For me, the wiring was tied down by wire tie just above the clutch.. Cut the wire tie and pull wiring down and there it is ready to plug into the switch.

By my logic, If you don't have switch installed, the car will be thinking the clutch is not engaged and therefore cruise control won't turn on.

If I am wrong and it works, just be careful cause if you have CC engaged and you press down on clutch, the engine will rev up quickly and could damage engine if you leave it revving long enough.

Paulee · 11-10-2015, 12:17 AM

U got a hatch or sedan? Next chance i get i check for the plug

Secretblend · 11-10-2015, 12:17 AM

Quote:

Originally Posted by Paulee

U got a hatch or sedan? Next chance i get i check for the plug

Sedan.

Paulee · 12-06-2015, 11:04 PM

got my CC installed today and loving it. Best $20 I spent. Still haven't got the clutch switch kit yet so had to jump the connector for it to work and yes, the revs jump when u step on the clutch with the cruise set. overall pretty simple install tho.

mumairr · 07-22-2017, 03:57 PM

My Vitz 2010 model already has wiring upto ECM (saw it by removing the cover behind the steering )but my cluster doesn't have any indicators for CC. Do you think if i install OEM CC, my car would be able to handle it? irrespective of the indication on the cluster? if this is the case, i might change my insturmenet cluster.

11-26-2010, 07:30 PM	#488
yarismadness Drives: Yaris 2007 hatchback 5 doors Join Date: Nov 2010 Location: montreal Posts: 2	Reusing the chutch switch to turn off the cruise Guys, I had I idea, and i need your opinion before trying it. The yellow wire on the clutch switch that blocks the start (i am talking about the one on the bottom, not the additional we should add to stop the cruise), has normally (when released) 12V, high impedance (my guess is a pull up resistor inside the ECU). when pressed (the clutch needs to go to the bottom), that line goes near 0V (pulled down by the starter relay coil). What if we sense that in order to stop the cruise? For example, a mosfet transistor will do the job perfectly. The problem: the cruise will disable ONLY if the clutch is COMPLETELY pressed. What will happen during the clutch travel? Cheers!

11-26-2010, 10:39 PM	#490
CTScott ULTIMATE View User's Garage Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008 Location: USA, CT Posts: 13,460	^Exactly. The starting clutch switch and the cruise clutch switch have exactly opposite purposes. The starting one is a "safety" which wants to see the clutch fully depressed and the cruise one cancels cruise mode to prevent revving as soon as the clutch is touched. The OEM clutch switch is under $20, so it's really not worth looking for an alternative solution. __________________

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05-13-2010, 05:01 PM	#487
rhaagusa Drives: 2010 yaris sedan Join Date: Apr 2010 Location: fort walton bch fl Posts: 9	Got it. Doesn't look to hard. With gratitude, RH

01-15-2011, 01:46 PM	#491
teddy Drives: 2008 5-door hatchback Join Date: Oct 2008 Location: Ontario, Canada Posts: 140	How is everyone running the wire from D3 to the ECM connector A21? Last night I tried to follow the conduit of wires running from the ECM in the engine bay without much luck. I didn't want to have to rip apart the engine bay to find out where it goes. I really feel like I'm missing something silly!

03-14-2011, 04:14 PM	#493
mgoldhawk Drives: 2001 Toyota Yaris Join Date: Sep 2010 Location: Zimbabwe Posts: 5	Would I be able to fit cruise control to my Yaris using the same method? I have a 2001 5door hatchback...

11-09-2015, 09:49 PM	#496
Paulee Drives: 09 yaris s five dr stick Join Date: Oct 2015 Location: mississauga Posts: 16	Hey guys. Got myself an 09 Yaris recently and want to add the cruise. Ordered the OEM stalk from China and was wondering if I will need a clutch switch too. I know the guide says I do but shouldn't the car already have one? havent tried starting it without pressing the clutch in (force of habit) but the switch should prevent the car from rolling forward on the starter no? apologize in advance if this was already covered elsewhere. -Paul

11-10-2015, 12:08 AM	#498
Paulee Drives: 09 yaris s five dr stick Join Date: Oct 2015 Location: mississauga Posts: 16	thanks. since posting I went through all the pages and some associated links. Think I have a good grip on what to do. just waiting for my stalk to arrive. might skip the clutch switch for now and drive around it. sounds like I dont have to dig under the dash and engine bay if I do save it for never.

11-10-2015, 12:17 AM	#500
Paulee Drives: 09 yaris s five dr stick Join Date: Oct 2015 Location: mississauga Posts: 16	U got a hatch or sedan? Next chance i get i check for the plug

12-06-2015, 11:04 PM	#502
Paulee Drives: 09 yaris s five dr stick Join Date: Oct 2015 Location: mississauga Posts: 16	got my CC installed today and loving it. Best $20 I spent. Still haven't got the clutch switch kit yet so had to jump the connector for it to work and yes, the revs jump when u step on the clutch with the cruise set. overall pretty simple install tho.

07-22-2017, 03:57 PM	#503
mumairr Drives: Toyota Vitz 2010 Join Date: Sep 2016 Location: Islamabad, Pakistan Posts: 2	My Vitz 2010 model already has wiring upto ECM (saw it by removing the cover behind the steering )but my cluster doesn't have any indicators for CC. Do you think if i install OEM CC, my car would be able to handle it? irrespective of the indication on the cluster? if this is the case, i might change my insturmenet cluster.