Welcome to the Australian Ford Forums forum.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and inserts advertising. By joining our free community you will have access to post topics, communicate privately with other members, respond to polls, upload content and access many other special features without post based advertising banners. Registration is simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact us.

Please Note: All new registrations go through a manual approval queue to keep spammers out. This is checked twice each day so there will be a delay before your registration is activated.

Go Back   Australian Ford Forums > Ford Australia Vehicles > Small and Mid Sized Cars > Focus

Reply
 
Thread Tools Display Modes
Old 09-12-2014, 10:06 AM   #1
FoxtrotGolfXray 5.0
Donating Member
Donating Member3
 
FoxtrotGolfXray 5.0's Avatar
 
Join Date: Mar 2007
Location: Heading thru Hell (Corner)
Posts: 8,335
Technical Contributor: For members who share their technical expertise. - Issue reason: Willingly providing technical info and documents, despite glitches. 
Default Deflation Warning - ST

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

__________________
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
FoxtrotGolfXray 5.0 is offline   Reply With Quote Multi-Quote with this Post
Old 09-12-2014, 10:25 AM   #2
DJM83
Barra Turbo > V8
Donating Member3
 
DJM83's Avatar
 
Join Date: Jan 2005
Posts: 26,016
Default Re: Deflation Warning - ST

Mine has done the same.
__________________
-2011 XR6 Turbo Ute - Lux Pack - M6
-2022 Hyundai Tucson Highlander Diesel N Line
DJM83 is offline   Reply With Quote Multi-Quote with this Post
Old 09-12-2014, 11:22 AM   #3
FoxtrotGolfXray 5.0
Donating Member
Donating Member3
 
FoxtrotGolfXray 5.0's Avatar
 
Join Date: Mar 2007
Location: Heading thru Hell (Corner)
Posts: 8,335
Technical Contributor: For members who share their technical expertise. - Issue reason: Willingly providing technical info and documents, despite glitches. 
Default Re: Deflation Warning - ST

Quote:
Originally Posted by DJM83 View Post
Mine has done the same.
Thanks.

Has/does it do it often? And does it still do it? I'm guessing that you haven't identified a cause yet?
__________________
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
FoxtrotGolfXray 5.0 is offline   Reply With Quote Multi-Quote with this Post
Old 09-12-2014, 11:46 AM   #4
eb falcon gl
75th anniversary
 
Join Date: Dec 2006
Posts: 103
Default Re: Deflation Warning - ST

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
__________________
LZ 2016 Focus RS in shadow black
eb falcon gl is offline   Reply With Quote Multi-Quote with this Post
Old 09-12-2014, 04:54 PM   #5
DJM83
Barra Turbo > V8
Donating Member3
 
DJM83's Avatar
 
Join Date: Jan 2005
Posts: 26,016
Default Re: Deflation Warning - ST

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
__________________
-2011 XR6 Turbo Ute - Lux Pack - M6
-2022 Hyundai Tucson Highlander Diesel N Line
DJM83 is offline   Reply With Quote Multi-Quote with this Post
Old 09-12-2014, 10:25 PM   #6
EVL BOS
FF.Com.Au Hardcore
 
EVL BOS's Avatar
 
Join Date: Jun 2006
Location: victoria
Posts: 840
Default Re: Deflation Warning - ST

Mines done it a few times. From meomory if the psi drop below 4psi lower than the set psi the alarm will go off
__________________


Daily: UA11 BiTurbo Everest
Weekend Project 1999 AU XR8
Past rides:

Mondeo XR5 Turbo

RIP: FGX XR8 MANUAL Build Thread:
http://fordforums.com.au/showthread.php?t=11447239

AU Fairlane Sparkling Burgundy thread:
http://fordforums.com.au/showthread....61#post5854961

UX explorer limited

FOCUS ST,

UT Explorer limited Written OFF

BA XR8
Build Thread:
http://fordforums.com.au/showthread....1299363&page=7

AU XR6 VCT

ED GLI Classic
EVL BOS is offline   Reply With Quote Multi-Quote with this Post
Old 10-12-2014, 06:41 AM   #7
Mulga
FF.Com.Au Hardcore
 
Mulga's Avatar
 
Join Date: Dec 2006
Location: Sydney
Posts: 510
Default Re: Deflation Warning - ST

Quote:
Originally Posted by EVL BOS View Post
Mines done it a few times. From meomory if the psi drop below 4psi lower than the set psi the alarm will go off
Same.
Mulga is offline   Reply With Quote Multi-Quote with this Post
Old 10-12-2014, 01:55 PM   #8
FoxtrotGolfXray 5.0
Donating Member
Donating Member3
 
FoxtrotGolfXray 5.0's Avatar
 
Join Date: Mar 2007
Location: Heading thru Hell (Corner)
Posts: 8,335
Technical Contributor: For members who share their technical expertise. - Issue reason: Willingly providing technical info and documents, despite glitches. 
Default Re: Deflation Warning - ST

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
FoxtrotGolfXray 5.0 is offline   Reply With Quote Multi-Quote with this Post
Old 12-12-2014, 11:37 PM   #9
gassed250
FF.Com.Au Hardcore
 
Join Date: Aug 2006
Posts: 543
Default Re: Deflation Warning - ST

I want to know how it sensors that there is a deflated tyre, as there's no pressure sensors in the wheels
__________________
GH Sigma EFI 351, 394whp @6500rpm
gassed250 is offline   Reply With Quote Multi-Quote with this Post
Old 13-12-2014, 10:03 PM   #10
bugmesome
Banned
 
Join Date: Apr 2014
Posts: 18
Default

Quote:
Originally Posted by gassed250 View Post
I want to know how it sensors that there is a deflated tyre, as there's no pressure sensors in the wheels
Could be mistaken, but I believe it's the ABS sensor that detects that the wheel is rotating slightly slower (faster?) than the others, thus must be a bit deflated.
bugmesome is offline   Reply With Quote Multi-Quote with this Post
Old 14-12-2014, 12:12 PM   #11
gassed250
FF.Com.Au Hardcore
 
Join Date: Aug 2006
Posts: 543
Default Re: Deflation Warning - ST

Quote:
Originally Posted by bugmesome View Post
Could be mistaken, but I believe it's the ABS sensor that detects that the wheel is rotating slightly slower (faster?) than the others, thus must be a bit deflated.
Ah yep I thought it must have been something along those lines
__________________
GH Sigma EFI 351, 394whp @6500rpm
gassed250 is offline   Reply With Quote Multi-Quote with this Post
Old 14-12-2014, 12:44 PM   #12
Cashie
FF.Com.Au Hardcore
 
Cashie's Avatar
 
Join Date: Dec 2004
Location: Perth
Posts: 1,794
Technical Contributor: For members who share their technical expertise. - Issue reason: Multiple helpful contributions throughout the tech area. 
Default Re: Deflation Warning - ST

Are there definitely no TPMS sensors in your wheels?
__________________
Current Rides:
2017 Ford Mustang
2020 Ford Everest Sport

Past Rides:
2017 Kia Stinger GT
2008 FG XR6 Sedan
2008 FG G6E Sedan
2004 BA XR8 Sedan
2008 BF XR6 Turbo Sedan
2004 BA XR8 Sedan
2003 BA XR8 Ute
2003 BA XR6 Sedan
Cashie is offline   Reply With Quote Multi-Quote with this Post
Old 16-12-2014, 04:24 PM   #13
gassed250
FF.Com.Au Hardcore
 
Join Date: Aug 2006
Posts: 543
Default Re: Deflation Warning - ST

Quote:
Originally Posted by Cashie View Post
Are there definitely no TPMS sensors in your wheels?
Nope

when I had new wheels fitted I used the original tyres and I was surprised that there were no sensors in them
__________________
GH Sigma EFI 351, 394whp @6500rpm
gassed250 is offline   Reply With Quote Multi-Quote with this Post
Old 20-12-2014, 10:03 AM   #14
pajoda
FF.Com.Au Hardcore
 
pajoda's Avatar
 
Join Date: Sep 2012
Location: Sydney
Posts: 718
Default Re: Deflation Warning - ST

Warning has come on for me about three times, pressure has been fine. Just reset and its fine again.
__________________
2018 Ford Focus RS
pajoda is offline   Reply With Quote Multi-Quote with this Post
Old 23-03-2015, 11:44 AM   #15
Bradw77
Starter Motor
 
Bradw77's Avatar
 
Join Date: Oct 2009
Location: Maffra
Posts: 13
Default Re: Deflation Warning - ST

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.
__________________
2016.5 TFII Kuga Trend. No modifcations......Yet
Bradw77 is offline   Reply With Quote Multi-Quote with this Post
Old 23-03-2015, 02:24 PM   #16
LeadFoot81
_Oo===oO_
 
LeadFoot81's Avatar
 
Join Date: Dec 2004
Location: Australia
Posts: 3,305
Default Re: Deflation Warning - ST

Quote:
Originally Posted by DJM83 View Post
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
I've had the same experience (once) in my Fiesta ST.
LeadFoot81 is offline   Reply With Quote Multi-Quote with this Post
Old 01-04-2015, 11:29 PM   #17
mik
FF.Com.Au Hardcore
 
mik's Avatar
 
Join Date: Feb 2005
Location: Melb north
Posts: 12,025
Default Re: Deflation Warning - ST

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 .
mik is offline   Reply With Quote Multi-Quote with this Post
This user likes this post:
Old 22-05-2015, 12:55 PM   #18
chrisorm
Regular Member
 
Join Date: Dec 2012
Posts: 48
Default Re: Deflation Warning - ST

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.
chrisorm is offline   Reply With Quote Multi-Quote with this Post
Reply


Forum Jump


All times are GMT +11. The time now is 02:35 AM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Other than what is legally copyrighted by the respective owners, this site is copyright www.fordforums.com.au
Positive SSL