Tire presure sensor

[slammedSI]

yeha there is quite a few systems out there,

[Jon]

Tire Pressure Monitoring System (TPMS)

NOTE: The smart junction box (SJB) is also identified as the generic electronic module (GEM).

The tire pressure monitoring system (TPMS) includes:

the smart junction box (SJB), TPMS functionality is integrated within the SJB.
four tire pressure sensors.
four tire pressure sensor cradles.
four tire pressure sensor straps.
an instrument cluster indicator.
a message center (if equipped).

Tire Pressure Monitoring System (TPMS) Module

The SJB contains the TPMS functionality. Refer to Tire Pressure Monitoring System in Diagnosis and Testing for TPMS fault diagnosis and repair.

The SJB compares the information of each tire pressure sensor transmission against a pressure limit. If the SJB determines that the tire pressure has fallen below the low limit, the SJB communicates this to the instrument cluster on the vehicle communication bus.


Tire Pressure Monitoring System (TPMS) Pressure Sensor

The SJB monitors the air pressure in the 4 road tires with tire pressure sensors. The sensors transmit radio frequency signals to the SJB approximately every 60 seconds when the vehicle speed exceeds 32 km/h (20 mph).

The tire pressure sensors are battery operated and are mounted to metal brackets (called cradles) on the wheels inside the tires. The sensors are mounted 180 degrees from the valve stem.

The tire pressure sensor can be serviced separately from the cradle and the strap.


Tire Pressure Monitoring System (TPMS) Pressure Sensor Cradle

The tire pressure sensor cradles are mounted to the wheels with metal straps and have an adhesive strip to aid in their retention to the wheel.

To service the sensor cradle, the strap must also be removed.


Tire Pressure Monitoring System (TPMS) Pressure Sensor Strap

The sensor strap keeps the sensor and the cradle retained to the wheel. A factory-installed strap is joined together with a one-time use buckle and a dealer-installed strap is joined together with a worm gear (similar to a radiator hose clamp). Both straps should be discarded after removal and should not be re-used.

The sensor can be serviced separately from the strap and cradle. The sensor is available separately from the cradle and the strap. The cradle and strap are available as a strap kit. There are several different strap kits available based on wheel diameter, all strap kits share the same base part number.

Instrument Cluster and Message Center

The instrument cluster illuminates the TPMS indicator when it receives a message from the SJB to do so and displays the appropriate message(s) in the message center (if equipped).

The instrument cluster and message center are diagnosed and serviced in their own respective workshop manual sections.



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[lilredpowerstroke]

Did the tire store transfer the monitoring sensors to the new rims??

[SHTUPNFISH]

My 08 F250 doesnt have TPMS sensors. In fact, I have NEVER seen a 3/4 ton or 1 ton truck with TPMS, and I work on them EVERY day. The tread act excludes vehicles that gross over 10k.

[lilredpowerstroke]

Where do you work?? That way I know what location to not take my truck to.

[ex dodge guy]

ok. I found out that the tire shop did not install the tmps snsors on the new rims off of the factory rims this cost me an additionial $200 to purchase new bands since the factory bands that hold the sensor in place can not be reused. Now the system monitoring just shows a low tire and not a monitor faliure. From a phone conversation with the service manager at the dealership, I now need to get the system reprogramed for the load rate E tire that run at a lower air (50 vs 80 PSI)presure then the stock tires.
I will keep everyone posted as I learn more.

Thanks,

EX Dodge guy

[SHTUPNFISH]

Ex Dodge Guy --- You should have a word or two with your tire shop. I sell a full set of 4 bands and 4 brackets for $50. They are made by Schrader Bridgeport and are even reusable.

lilredpowerstroke --- I work for the countries largest tire dealer. Now, all we do is wheels and tires. I see 3/4 ton and 1 ton trucks on a daily basis. I have never seen a 3/4 ton or 1 ton truck with TPMS sensors; whether Ford, GM, or Dodge. Now, I own an 08 and do not have TPMS on it. But, incase you would like some information to expand your knowledge:

Copied from Tire Industy Association newsletter:
"In case you haven’t read this publication for the past two issues, the federal government has passed legislation that mandates TPMS on every vehicle under 10,000 lbs GVWR starting September 2007"

[Scott_M]

Originally Posted by SHTUPNFISH

My 08 F250 doesnt have TPMS sensors. In fact, I have NEVER seen a 3/4 ton or 1 ton truck with TPMS, and I work on them EVERY day. The tread act excludes vehicles that gross over 10k.

All 2008 job #2 F250 and F350 single rear wheel trucks have the TPMS. Not sure about the dual rear wheel.

[BUKWAKR]

ok

so how doe's it work when installing aftermarket wheels and tires, how do you recalibrate it

all this new stuff is a pain in the a$$

Darrell

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Last edited by BUKWAKR : 01-23-2008 at 07:04 PM.

[SHTUPNFISH]

I am going to guess if you have the 10,000lb gvwr package you do not get it? I have put aftermarket rims on four 08's since this thread and none of them had TPMS. I have dismounted the tires to make sure and there are not bands with sensor's...

But, my fitment guide in our computer system says that the vehicles all should?