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09-12-2014, 11:06 AM
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#1 | ||
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Donating Member
 
Join Date: Mar 2007
Location: Heading thru Hell (Corner)
Posts: 8,225
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Had an interesting one the other day. was on my home from work when the Deflation Warning appeared. As I had just pulled into a town on the way home, I diverted to the nearest servo and checked the tyre pressures.
Found the front right to be a few psi lower than what I run them at, but I thought the Deflation Warning was not sensitive enough to pick up variations of only a few psi. Put some air in the tyre, rest the Deflation Warning system at the new pressures and have not had a problem since. Figured it must have been a instrument error. Anyone else experienced this? Craig H
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Labels are for jars, not for people. Life is a journey, not a destination. ~~~~~~~~~~~~~~ Daily: 2013 FGII EcoLPi in Winter White Play: 2015 FG X XR8 in Emperor Show' N Shine thread Gone, but not forgotten: 2015 SZII petrol Titanium Territory in Emperor |
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09-12-2014, 11:25 AM
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#2 | ||
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Barra Turbo > V8
 
Join Date: Jan 2005
Posts: 25,816
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Mine has done the same.
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-2011 XR6 Turbo Ute - Lux Pack - M6 -2022 Hyundai Tucson Highlander Diesel N Line |
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09-12-2014, 12:22 PM
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#3 | |||
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Donating Member
Join Date: Mar 2007
Location: Heading thru Hell (Corner)
Posts: 8,225
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Quote:
Has/does it do it often? And does it still do it? I'm guessing that you haven't identified a cause yet?
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Labels are for jars, not for people. Life is a journey, not a destination. ~~~~~~~~~~~~~~ Daily: 2013 FGII EcoLPi in Winter White Play: 2015 FG X XR8 in Emperor Show' N Shine thread Gone, but not forgotten: 2015 SZII petrol Titanium Territory in Emperor |
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09-12-2014, 12:46 PM
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#4 | ||
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75th anniversary
Join Date: Dec 2006
Posts: 103
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Mine has done it twice and both times only one tyre has been down a few psi.
The first time it happened i thought something was wrong with it because i was under the impression that it meant that the tyre was dead flat. I got out and checked it and no tyre was obiviously flat
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LZ 2016 Focus RS in shadow black |
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09-12-2014, 05:54 PM
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#5 | ||
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Barra Turbo > V8
Join Date: Jan 2005
Posts: 25,816
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Only does it when the tyre has dropped a cpl psi. Always the same though, it has never been more than about 4 psi when it has gone off
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-2011 XR6 Turbo Ute - Lux Pack - M6 -2022 Hyundai Tucson Highlander Diesel N Line |
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09-12-2014, 11:25 PM
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#6 | ||
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FF.Com.Au Hardcore
Join Date: Jun 2006
Location: victoria
Posts: 840
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Mines done it a few times. From meomory if the psi drop below 4psi lower than the set psi the alarm will go off
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10-12-2014, 07:41 AM
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#7 | |||
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FF.Com.Au Hardcore
Join Date: Dec 2006
Location: Sydney
Posts: 510
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Quote:
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10-12-2014, 02:55 PM
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#8 | ||
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Donating Member
Join Date: Mar 2007
Location: Heading thru Hell (Corner)
Posts: 8,225
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Thanks guys!
Not sure where I picked it up (handbook, maybe?), but I was certainly under the impression that the Deflation Warning system did not activate with pressure variations of relatively small pressure deviations. With my experience and your individual experiences as well, it would appear that my understanding was indeed incorrect. Thanks again for the input. Craig H
__________________
Labels are for jars, not for people. Life is a journey, not a destination. ~~~~~~~~~~~~~~ Daily: 2013 FGII EcoLPi in Winter White Play: 2015 FG X XR8 in Emperor Show' N Shine thread Gone, but not forgotten: 2015 SZII petrol Titanium Territory in Emperor |
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13-12-2014, 12:37 AM
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#9 | ||
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FF.Com.Au Hardcore
Join Date: Aug 2006
Posts: 543
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I want to know how it sensors that there is a deflated tyre, as there's no pressure sensors in the wheels
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GH Sigma EFI 351, 394whp @6500rpm |
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13-12-2014, 11:03 PM
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#10 | |||
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Banned
Join Date: Apr 2014
Posts: 18
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Quote:
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14-12-2014, 01:12 PM
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#11 | |||
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FF.Com.Au Hardcore
Join Date: Aug 2006
Posts: 543
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Quote:
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GH Sigma EFI 351, 394whp @6500rpm |
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14-12-2014, 01:44 PM
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#12 | ||
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FF.Com.Au Hardcore
Join Date: Dec 2004
Location: Perth
Posts: 1,794
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Are there definitely no TPMS sensors in your wheels?
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16-12-2014, 05:24 PM
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#13 | |||
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FF.Com.Au Hardcore
Join Date: Aug 2006
Posts: 543
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Quote:
when I had new wheels fitted I used the original tyres and I was surprised that there were no sensors in them
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GH Sigma EFI 351, 394whp @6500rpm |
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20-12-2014, 11:03 AM
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#14 | ||
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FF.Com.Au Hardcore
Join Date: Sep 2012
Location: Sydney
Posts: 718
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Warning has come on for me about three times, pressure has been fine. Just reset and its fine again.
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23-03-2015, 12:44 PM
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#15 | ||
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Starter Motor
Join Date: Oct 2009
Location: Maffra
Posts: 13
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Had this happen on the way to work this morning, got to work and found the front right tyre flat. Now I have to decide whether I change it myself or get RACV to come out to work and change it for me.
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23-03-2015, 03:24 PM
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#16 | |||
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_Oo===oO_
Join Date: Dec 2004
Location: Australia
Posts: 3,305
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Quote:
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02-04-2015, 12:29 AM
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#17 | ||
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FF.Com.Au Hardcore
Join Date: Feb 2005
Location: Melb north
Posts: 12,025
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once your tyre is flat , the damage is probably done, big chance your tyre will end up knackered if you drove on it any distance,
also if you ignore the tyre pressure warnings and drive on it spongey or with very low inflation pressure its possible to do damage to the rim and then theres always a possibility if you happen to be going around a bend and the tyre has low pressure in it, it can become unseated from the rim and you could end up on your roof .......... ask me how i know this  .
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22-05-2015, 01:55 PM
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#18 | ||
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Regular Member
Join Date: Dec 2012
Posts: 48
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Had ours go off last week, and upon checking the pressures, one was down to 25psi.
Was curious to see if I had reset it properly, page 11 of this PDF seems to explain it accurately - it's definitely based off rolling circumference calculated by the ABS sensor: http://www.fordservicecontent.com/pu...N13FOCqg1e.pdf Although I reset it while driving, so should remember to reset it tonight. |
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Deflation Warning - ST
Linear Mode
