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09-22-2012, 01:56 PM
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#1 |
 
Drives: 2010 Yaris 3 Door Hatchback Join Date: Apr 2011
Location: Tucson, AZ
Posts: 3
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Low Pressure Indicator Light Threshold Pressure
I have a 2010 Yaris Hatchback. Sticker on door frame indicates preferred pressure is 32 psia. What is the set point threshold at which the low pressure indicator illuminates? I called the dealer and the service writer I spoke to wasn't real knowledgeable.
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09-22-2012, 03:45 PM
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#2 |
 ULTIMATE
Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
Location: USA, CT
Posts: 13,460
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The service manual only states that a loss of more than 5.8 psi in 30 seconds will trigger the indicator or the pressure dropping below an unspecified threshold. Looking at the TechStream data for the TPMS ECU that I have on my test bench, then "IDn Initial Threshold of Low Pressure" is set to 24psi, which would be a 25% drop in pressure from the OEM recommended 32 psi.
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09-22-2012, 04:00 PM
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#3 |
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Drives: 2010 Yaris 3 Door Hatchback Join Date: Apr 2011
Location: Tucson, AZ
Posts: 3
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Thank you for the reply. I checked the tires after the light stayed illuminated upon cold start this morning, at an ambient temperature of about 72F. Three tires were above 30 psi by varying amounts. One was at 28 psi. I inflated it to 33 psi and made sure the other three were reading 33 psi. The light did not illuminate. I wonder why Toyota won't share the threshold with even dealers?
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09-22-2012, 04:22 PM
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#4 |
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Modded Moderator
Drives: 07 Toyota Yaris, 71 Galaxie Join Date: Mar 2007
Location: Wenatchee, WA
Posts: 3,670
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Damn if Scott got a nickel for every helpful post he'd have a crapload of nickels.
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01-06-2013, 09:18 PM
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#5 |
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147K-Blue / 24K-Yellow
Drives: 2010 Ylw 3dr. AT(Blue-Wife's) Join Date: Mar 2011
Location: North Branch, MN
Posts: 77
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Astroman,
He'd have at least enough to make "Crashy" a "no cost" project...and probably put gas in it too. I see Scott added another Yaris to his garage. They'r like potato chips you cant have just one...I'm thinking when my 2010 is paid off I'll get another one....
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All Weather Package, Power Package, Cruise, WeatherTech Floor Mats. Altimax Arctic Winter Tires. Repair List: 1 new blower motor, making funny noise. @ 91K (Water pump @ 120K) Mod List: 1. Black tape on most of the annoying blue high beam light behind the lens. (thank you CTScott) |
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01-07-2013, 12:17 AM
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#6 |
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やりすぎだ～
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Forget Siri. WE NEED A CTScott APP.
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