Service Tire System Soon - Message



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    Question Service Tire System Soon - Message

    We have a 2004 T&C Limited. It has the TPMS (Tire Pressure Monitoring System) with the display on the overhead console where the compass and exterior temperature is displayed. About three months ago we began getting the following message:

    Service Tire System Soon

    It will not go away, and if cleared it reappears in just a minute or two. Today I took it to a local tire shop and they tested each of the tires pressure sensors with a wireless device and were able to confirm each tires sensor was indeed transmitting. They also dropped the pressure in each tire and the system then reported a tire with low pressure. So, the system is working. How does someone RESET the system? The guy at the tire shop said it most likely needs to go to the dealer, but I have yet to find a dealership that has a service department that ever fixes a problem in one visit. It is like they just swap out parts until the problem goes away.

    Anyone have any ideas?

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    Did they check the spare tire? Not sure about Chrysler but many manufacturers put a transmitter in the spare.
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    Quote Originally Posted by flash9 View Post
    We have a 2004 T&C Limited. It has the TPMS (Tire Pressure Monitoring System) with the display on the overhead console where the compass and exterior temperature is displayed. About three months ago we began getting the following message:

    Service Tire System Soon

    It will not go away, and if cleared it reappears in just a minute or two. Today I took it to a local tire shop and they tested each of the tires pressure sensors with a wireless device and were able to confirm each tires sensor was indeed transmitting. They also dropped the pressure in each tire and the system then reported a tire with low pressure. So, the system is working. How does someone RESET the system? The guy at the tire shop said it most likely needs to go to the dealer, but I have yet to find a dealership that has a service department that ever fixes a problem in one visit. It is like they just swap out parts until the problem goes away.

    Anyone have any ideas?
    I can not edit my original post, but my Chrysler T&C Limited is a 2005!

    Side note - Checked the Spare and it Does Not have a Pressure Sensor inside it.

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    I'd say that maybe one or more of the sending units is sensing low battery voltage... so it tells you to "service" the system..
    If this is the case, you'll likely see one or more of the sensors begin to drop out when temps drop below freezing.

    That said, I was not aware that TPMS will give you an advanced warning (but maybe this feature was introduced on 2nd ed of 4th gen vans and so we are just beginning to see batteries go bad..)

    would you mind telling the forums your approx mileage and if the van is an early build?

    BTW, TPMS will only monitor 4 sensors on these vehicles..

    PS: the sensors are not serviceable and must be replaced as a whole unit (no battery swap)
    Last edited by atoman; 09-11-2009 at 04:05 PM.

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    Quote Originally Posted by atoman View Post
    I'd say that maybe one or more of the sending units is sensing low battery voltage... so it tells you to "service" the system..
    If this is the case, you'll likely see one or more of the sensors begin to drop out when temps drop below freezing.

    That said, I was not aware that TPMS will give you an advanced warning (but maybe this feature was introduced on 2nd ed of 4th gen vans and so we are just beginning to see batteries go bad..)

    would you mind telling the forums your approx mileage and if the van is an early build?

    BTW, TPMS will only monitor 4 sensors on these vehicles..

    PS: the sensors are not serviceable and must be replaced as a whole unit (no battery swap)
    2005 T&C with 51k miles. It was purchased in June or 2005.

    My intentions were to confirm one of the sensors was BAD and then just replace all four sensors, BUT now that the local tire shop tested the four sensors and supposedly they are transmitting just fine. I am starting to wonder if it might be something to do with the overhead display? The local shop has quoted replacing all four sensors for $275, which seems very reasonable, but if that does not fix the message it would be a waste of $$$.

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    Intrigued by your post, I did a little research and learne d a few things about the TPMS.

    The Tire Pressure Monitoring (TPM) system uses radio and sensor technology to monitor tire air pressure levels. Sensors, mounted to each road wheel as part of the valve stem, transmit an RF signal indicating their individual pressure to a receiver located in the Sentry Key Remote Entry Module (SKREEM). These transmissions occur approximately once every minute at speeds over 15 mph (24 km/h). The Tire Pressure Monitoring system remains active even if no tire pressure related message is displayed.

    The sensors lay dormant (Park Mode), then wake and start transmitting (Drive Mode) when the vehicle first reaches speeds over 15 mph (24 km/h). Once the wheels stop rotating for a period of approximately 20 minutes, the sensors shut down until again awaken. Although not transmitting as when in Drive Mode, while in Park Mode, the sensors still transmit approximately once every 13 hours to let the receiver know air pressure status at that time.

    TPM THRESHOLD PRESSURES DESCRIPTION SPECIFICATION
    High Pressure ON Threshold 48 PSI (331 kPa)
    High Pressure OFF Threshold 43 PSI (296 kPa)
    Placard Pressure (Cold) 36 PSI (248 kPa)
    Low Pressure OFF Threshold 33 PSI (214 kPa)
    Low Pressure ON Threshold 28 PSI (193 kPa)

    The only thing I can think is happening, is that since your sensors checked out OK, then perhaps you have a very slow leak in one of your tires.
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    You might want to take it to the dealer or someone with Scanner that can read the codes.
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    I'd wait to see if one or more of the sensors drops out completely.. (just make sure to test the tire pressure every once in a while)
    I know it's annoying to see the msg, but it does no harm to the van and throwing money at something as trivial as this seems a waste to me...

    If you have an extended warranty, you can try the dealer.. otherwise it will probably be a waste of time and money..

    RE:"I am starting to wonder if it might be something to do with the overhead display?"
    Absolutely not, the display only displays text corresponding to the PCI bus message it receives...

    However, the system operates wireless at 315Mhz and RF interference or problems with SKEEM module can effect it..
    (SKEEM is unlikely if you RKE system works without problems)

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    this is from the owners manual on the subject:
    (note that the message name is slightly different)
    "
    CHECK TPM SYSTEM
    The Tire Pressure Monitor System (TPM) system requires
    service.
    See your authorized dealer for service.
    CAUTION!
    The TPM system has been optimized for the original
    equipment tires and wheels. TPM system pressures
    have been established for the tire size equipped on
    your vehicle. Undesirable operation or sensor damage
    may result when using replacement equipment
    that is not of the same size, type, and/or style.
    After-market wheels can cause sensor damage. Do
    not use tire sealant or balance beads if your vehicle
    is equipped with TPM system as damage to the
    sensors may result.
    "

    PS: I have an 05 T&C ltd with over 67Kmi and on the road since ~aug 04 (originally in NJ, now in NY) and I'm yet to see any warning from TPM sys.
    Last edited by atoman; 09-11-2009 at 05:06 PM.

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    Exclamation An Update

    I figure I own everyone an update.

    Late Friday afternoon, I decided to try the Ask a Mechanic Online from Just Answer. It cost me $13, and I hope it will be worth the money I paid.

    ================================================== =====
    My Question:
    We have a 2005 T&C Limited. It has the TPMS (Tire Pressure Monitoring System) with the display on the overhead console where the compass and exterior temperature is displayed. About three months ago we began getting the following message:

    Service Tire System Soon

    It will not go away, and if cleared it reappears in just a minute or two. Today I took it to a local tire shop and they tested each of the tires pressure sensors with a wireless device and were able to confirm each tires sensor was indeed transmitting. They also dropped the pressure in each tire and the system then reported a tire with low pressure. So, the system is working. How does someone RESET the system? What is going on?

    Optional Information:
    Year: 2005
    Make: Chrysler
    Model: Town & Country Limited
    Engine: 3.8

    Already Tried:
    Tested the Tire Pressure Sensors and they are transmitting.

    ================================================== =====
    Posted by Mopar Certified
    Answer:

    Hi,

    The most likely reason for this message is that one or more of the sensors has a battery that is starting to fail.
    The life expectancy of these sensors......and their internal batteries......is 5 years. With the 2010's coming out, that pretty much puts your sensors at 5 years old and they will likely need replacing soon.........just like the message says...soon, not immediately.
    Thank You
    Mopar CertifiedTechnician
    22 Year Factory Trained and Certified

    ================================================== =====
    My Reply:
    Thank you - I can pickup four OEM Sensors for about $200, and the local tire shop said they will install them for $75, but since they were not able to confirm one of the sensors was BAD, they were apprehensive to go this way.
    With the 2005, there is no reset function on the overhead display. If we choose the replace the four sensors (since there is no way to figure out which one is week). Do we need to somehow retrain the system, or will it just recognize the new sensors and reset itself?

    ================================================== =====
    Posted by Mopar Certified
    Answer:

    Once the sensors have been replaced, Drive vehicle for a minimum of five minutes while maintaining a continuous speed above 15 mph (24 km/h). During this time the system will learn the new sensor ID code and will clear any DTC's automatically.

    ================================================== =====
    My Reply:
    Thank you - As an engineer this seems like a poorly designed system. If I had known these typically only last 5-6 years I would have replaced them when I did the tires back at the first of the year. Also, the warning message should not be consistent. There is no way to temporary clear it for more then a minute or two before it returns. I could understand it being constant once it has completely lost the signal, but as long is it is just week, it seems to be an overkill.

    Thank you again, and I will get off of my salt box now.

    ================================================== =====
    Posted by Mopar Certified
    Answer:

    Thank you

    ================================================== =====
    So, now I will order the parts and report back if this fixed the problem.

    I did my Ask the Mechanic Question at 3:15pm on Friday. If I had seen MoparChickie's great post I might have been able to save $13, but it helps to have it confirmed before I go off and spend about $250 to fix this problem.

    This does explain why when others have seen this message and they take the vehicle in to the Dealership, it becomes a crap shoot as to which sensor needs to be replaced.

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