DIY - Bypassing Tire Pressure Warning System (TPWS / TPMS) - Page 4 - Toyota Yaris Forums

CTScott · 12-02-2008, 08:43 PM

Quote:

Originally Posted by ivanmadeline

I tried doin it on Sunday but the problem I had was that when I hit the button the light would start flashing the it would come on then I hit the button again and the same thing it would just flash for a few minutes and then stay on again.
I dont know if this makes a difference but i Dont have a brown cable on mine I have a white with a black stripe were that brown one is on your write up. Any suggetions. thanks for all your help.

Can you take a picture of your connector? The part number is the same for 08 and 09 sedans and LBs, so even though the wire colors are different, their functions are identical.

If your connections are in the correct place, try measuring the voltage on the "brown" wire with the switch in both modes. With the TPWS connected (and the sensors not present) you will read ~1 VDC. Withe the TPWS bypassed you should read ~4 VDC. If the voltage is less than 3 VDC, the light will remain on.

If you do measure less than 3 VDC, you will need to change the resistiors to 150 ohm, 1/2 watt ones.

ivanmadeline · 12-02-2008, 08:47 PM

Quote:

Originally Posted by CTScott

Can you take a picture of your connector? The part number is the same for 08 and 09 sedans and LBs, so even though the wire colors are different, their functions are identical.

If your connections are in the correct place, try measuring the voltage on the "brown" wire with the switch in both modes. With the TPWS connected (and the sensors not present) you will read ~1 VDC. Withe the TPWS bypassed you should read ~4 VDC. If the voltage is less than 3 VDC, the light will remain on.

If you do measure less than 3 VDC, you will need to change the resistiors to 150 ohm, 1/2 watt ones.

I'll try again this weekend thanks.

linny · 12-03-2008, 06:39 PM

Installed the 150 Ohm resistor harness yesterday and no more light!! Took a 60 mile drive last night and 3 mile work commute today and all is still great!

Pitt Yaris · 12-05-2008, 09:34 AM

i haven't checked my pressure lately, but everything is stock on mine....the light came on when it got cold out, and hasn't turned off since. car is two months old

mikenacarato · 12-05-2008, 09:41 AM

add some air

ivanmadeline · 12-07-2008, 08:20 PM

Quote:

Originally Posted by CTScott

Can you take a picture of your connector? The part number is the same for 08 and 09 sedans and LBs, so even though the wire colors are different, their functions are identical.

If your connections are in the correct place, try measuring the voltage on the "brown" wire with the switch in both modes. With the TPWS connected (and the sensors not present) you will read ~1 VDC. Withe the TPWS bypassed you should read ~4 VDC. If the voltage is less than 3 VDC, the light will remain on.

If you do measure less than 3 VDC, you will need to change the resistiors to 150 ohm, 1/2 watt ones.

Hey CTScott thank to you the light is gone. The first time the light came on again but when I got home I change the blue and the yellow cable around and the light was on I click the switch and the light is gone. Thanks for all your hard work.

IllusionX · 12-09-2008, 02:24 PM

Scott, do you have a picture of that light ?

CTScott · 12-09-2008, 03:42 PM

Quote:

Originally Posted by IllusionX

Scott, do you have a picture of that light ?

It is the one that looks like this:

IllusionX · 12-09-2008, 07:08 PM

thank you.

Black Yaris · 12-09-2008, 08:12 PM

so is this latest fix 100% working, with no problems?

ivanmadeline · 12-09-2008, 08:19 PM

Quote:

Originally Posted by Black Yaris

so is this latest fix 100% working, with no problems?

I can let you know tomorrow I just got done changing the resistior to the 150 omh 1/2 watt. I had the 10 ohm that i install the first time and the light would stay off the first day and it would come back on the next day after the first 15 min ride.

linny · 12-10-2008, 12:39 PM

I put in the 150 Ohm resistor mod on Dec 2 and have had no problems in the ~150 miles I have driven since. I did not do the switch procedure as I do not intend to EVER go back to a TPMS. I personally see absolutely no value in TPMS whatsoever for me.
SO, if I ever buy another new car I will do this all over again!

ivanmadeline · 12-11-2008, 07:24 PM

Quote:

Originally Posted by Black Yaris

so is this latest fix 100% working, with no problems?

Yes it does work the 2nd day in the road no light. With no switch.

blacksandiegovitz · 12-15-2008, 07:18 PM

Still working with the 150 ohm resistor modd????

linny · 12-16-2008, 11:31 AM

It is still working for me!

09TRD · 12-18-2008, 08:46 PM

Just to verify:

If one chooses to do this mod without the switch, the connector remains UNPLUGGED from the TPWS module?

CTScott · 12-18-2008, 08:55 PM

Quote:

Originally Posted by 09TRD

Just to verify:

If one chooses to do this mod without the switch, the connector remains UNPLUGGED from the TPWS module?

Correct.

Tiddlygoose · 01-20-2009, 10:49 PM

OK, so I followed the first mod as CTScott knows... Then I followed the corrected 2nd version of the mod. I Left the first switch in the on position, Added a second push button switch with the 3 150 ohm resistors and it worked right up until the time I got up to highways speed. Then the darned light came back on. No amount of changing either switch changes anything at all.

Question. Can the dealer disable the entire TPMS system, even if it costs me? Has anyone had that done or know anything? I always check my own damed tires. I've never had anything like this to fall back on before and with my tire switching situation I'd just as soon loose TPMS all together at this point.

12-03-2008, 06:39 PM	#57
linny Drives: '08 liftback mt Join Date: Nov 2008 Location: Mn Posts: 39	Installed the 150 Ohm resistor harness yesterday and no more light!! Took a 60 mile drive last night and 3 mile work commute today and all is still great! Last edited by linny; 12-03-2008 at 09:42 PM.

12-09-2008, 08:12 PM	#64
Black Yaris der Zeck View User's Garage Drives: '05 Audi A4 1.8t quattro Join Date: Sep 2006 Location: Toledo, OH Posts: 5,231	so is this latest fix 100% working, with no problems? __________________

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12-05-2008, 09:34 AM	#58
Pitt Yaris Drives: Flint Mica Sedan Join Date: Oct 2008 Location: Pittsburgh Posts: 475	i haven't checked my pressure lately, but everything is stock on mine....the light came on when it got cold out, and hasn't turned off since. car is two months old

12-05-2008, 09:41 AM	#59
mikenacarato SIPNDEW View User's Garage Drives: 15 STI Join Date: Oct 2008 Location: Brentwood, TN Posts: 2,281	add some air

12-09-2008, 02:24 PM	#61
IllusionX It's the illusion you see View User's Garage Drives: 07 Yaris Sedan Aero Join Date: Oct 2006 Location: Brossard, QC Posts: 3,888	Scott, do you have a picture of that light ?

12-09-2008, 07:08 PM	#63
IllusionX It's the illusion you see View User's Garage Drives: 07 Yaris Sedan Aero Join Date: Oct 2006 Location: Brossard, QC Posts: 3,888	thank you.

12-10-2008, 12:39 PM	#66
linny Drives: '08 liftback mt Join Date: Nov 2008 Location: Mn Posts: 39	I put in the 150 Ohm resistor mod on Dec 2 and have had no problems in the ~150 miles I have driven since. I did not do the switch procedure as I do not intend to EVER go back to a TPMS. I personally see absolutely no value in TPMS whatsoever for me. SO, if I ever buy another new car I will do this all over again!

12-15-2008, 07:18 PM	#68
blacksandiegovitz Your mom goes to college View User's Garage Drives: 08 Vitz Join Date: Oct 2008 Location: Just chillin' out brah ! Posts: 1,434	Still working with the 150 ohm resistor modd????

12-16-2008, 11:31 AM	#69
linny Drives: '08 liftback mt Join Date: Nov 2008 Location: Mn Posts: 39	It is still working for me!

12-18-2008, 08:46 PM	#70
09TRD Drives: 09 Yaris hatch, 09 Z51 'Vette Join Date: Oct 2008 Location: RI Posts: 100	Just to verify: If one chooses to do this mod without the switch, the connector remains *UNPLUGGED* from the TPWS module?

01-20-2009, 10:49 PM	#72
Tiddlygoose View User's Garage Drives: 2009 Honda Civic Sedan SI Join Date: Oct 2008 Location: New Hampshire Posts: 54	OK, so I followed the first mod as CTScott knows... Then I followed the corrected 2nd version of the mod. I Left the first switch in the on position, Added a second push button switch with the 3 150 ohm resistors and it worked right up until the time I got up to highways speed. Then the darned light came back on. No amount of changing either switch changes anything at all. Question. Can the dealer disable the entire TPMS system, even if it costs me? Has anyone had that done or know anything? I always check my own damed tires. I've never had anything like this to fall back on before and with my tire switching situation I'd just as soon loose TPMS all together at this point.