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Unread 05-24-2013, 06:24 PM   #1
99JeepGC47
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2008 KK Liberty 
 
Join Date: Jul 2010
Location: Sumter, South Carolina
Posts: 176
TPM System

Today while driving to work my tire light started flashing, and then the dash read Check TPM System. I then tried to check the pressure in my tires and it was blank. I did a quick walk around and none were going flat.

When I left work all was fine and all my pressures were above 32 pounds. I will set them all to 35 in the morning, but is this a major problem? If it helps I just rolled over 100,00 miles.

I know were the sending units are in each tire, where is/are the receiving units at?

Thanks

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Unread 05-24-2013, 07:11 PM   #2
_benjammin
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2012 KK Liberty 
 
Join Date: Mar 2012
Location: Wilmington, NC
Posts: 294
What year? If you're sure all 4 are@32 psi you might have a bad sensor. Check your spare too.
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Unread 05-24-2013, 10:37 PM   #3
eoerikson3
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2011 KK Liberty 
 
Join Date: Dec 2011
Location: Pawtucket, Rhode Island
Posts: 361
Quote:
Originally Posted by _benjammin
What year? If you're sure all 4 are@32 psi you might have a bad sensor. Check your spare too.
There's a sensor in the spare?

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Unread 05-25-2013, 11:54 AM   #4
Drednot
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Yeah, there is a sensor in the spare.
The main function of the TPMS is to alert you before the tire goes low enough where you would notice it. That is to prevent you from driving on a moderately low tire that builds up heat eventually blows out at high speed.
I think they start to indicate around 30 psi.
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Unread 05-25-2013, 03:00 PM   #5
xxxxxxxxxxxxSmetna
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2011 KK Liberty 
 
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Posts: 93
There's only a sensor in a full size spare.
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Unread 05-25-2013, 03:45 PM   #6
99JeepGC47
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2008 KK Liberty 
 
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Location: Sumter, South Carolina
Posts: 176
All have been checked and are now good. Even the spare.
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Unread 06-04-2013, 06:54 PM   #7
usaretired
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2008 KK Liberty 
 
Join Date: Jun 2013
Location: West Valley City, UT
Posts: 7
If you have the 18" chrome clad alloy wheel option, your cold tire pressure is 33 psi. The spare tire pressure isn't being received only the 4-mounted road tires. There's no reset button so you have to drive for 10 minutes above 15 mph to reset after correcting cold tire pressure. You can continuously monitor your active TPMS readings in the electronic vehicle information center (EVIC). The 4-mounted road tire readings are displayed in a submenu on the EVIC. FYI, the low pressure tire reading & road tire position flashes until the correct tire pressure is achieved. Your Owners Manual pages 357-366 covers TPMS. The tire sensor only transmits the current air pressure in the tire & will display that reading in the EVIC. When one or more sensors drop 3-4 psi after reset, the road tire position & tire PSI will flash until corrected again. Your Owners Manual pages 215-228 covers the EVIC menus & submenus. I hope this helps.
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