BTW, ever try to read assembly instructions for something made in China? Can make you laugh-or cry. I couldn't find any pictures of the back side of the 20117 where the data information is, but I'll wager yours are incorrectly catalogued.

 

I don't see on that page where it tells the frequency. It's just a different brand from mine.

Sonny

 

The data plate on mine says 315FM and they are EARLY. If yours are 315FM mhz, you've got the WRONG ones. See above Bill Curlee.

 

Yeah, I saw his post and, the shape of mine are the latter one but, if the frequency is wrong, that's another story. Then again, the shape of the one you sent me is indicative of an early one. Guess I need to thumb through my shop manual when I get home from work and see if it lists what frequencey they should be.

Sonny

 

Lot of stuff made in China is knock-off, and that doesn't means it's correct. I don't know the late frequency-maybe others do-but everything you've posted says to me you've got the wrong sensors. Good luck and let me know if I can help.

 

If they do, I would certainly like to hear them chime in!

I've searched my '04 manuals and there is NO mention of the frequency for the remotes or the TPMS that share the same receiver that I can find.

All I can do, if everyone is positive that the 315mhz is only used for the early (pre '01) cars, is contact the supplier of my units and tell them their listing is wrong and hope I can get some deal on a return or refund which may be difficult as the TPMS are already installed.

Sonny

 

This site says the '04 TPMS sensors are made by Schrader but I'm still looking for your frequency:
http://www.gmtpms.com/?gclid=CJ-mosuC8rMCFQGFnQodvSkASw

 

This says "often around 315 mhz":
http://en.wikipedia.org/wiki/Direct_TPMS

 

Sensor-is this the one you bought?
http://www.jegs.com/i/Orange-Electro...rentProductId=

 

Just found this quote in a Camaro forum...

"Orange Electronics produces OEM and aftermarket sensors, one of their technical guys responded back to me.

Apparently, GM decided to change their sensor frequency mid-year during production of all 2010 models. The early 2010 models have a 315 Mhz frequency sensor in the tires. Somewhere along the way, they became 314.9 Mhz sensors. This new 314.9 Mhz frequency is GM's new "Global Standard"."

That makes me think that mine maybe SHOULD be the 315 mhz model.

If only I had access to an RF analyzer...

Sonny

 

See posts 16&19:
http://forums.corvetteforum.com/c5-g...s-sensors.html

I think the NET of it is that you've got the wrong part or bad parts. If it were me, I'd bite the bullet and pick up (4) Schrader 20117s from Amazon and call it a day--they are the OEM supplier. BTW, was the TPMS sytem working BEFORE you changed wheels? There is the (remote) possibility the receiver could be bad.

 

Looks like the same one and part number matches. I bought mine from OE Wheels where I bought wheels also.

It, also, states there that it is a direct replacement for the GM part#25773946 which I looked up and it is the correct part for my car.

Sonny

 

Early sensors: GM 10438853
Late sensors: GM 25773946-you are correct
Just checked the parts data base I use, and the "early" sensors are NLA. Only listing is a number for export cars. ANOTHER part GM has abandoned-thank goodness for the aftermarket.

 

I was wondering when some one would ask that.

Yes, it worked before.

Sonny

 

I started looking at this too. I looked at the Schrader web site

http://www.schraderinternational.com

I downloaded their catalog and for both
28006 for the '97-'00
20117 for the '01-'04
it shows 315 MHz.

They are different sensors, and I know they don't interchange, but per Schrader's information they both use 315MHz.

I also looked at one of my late C5 sensors and the label has a line that includes "315AM" which I assume is a 315 MHz. From an earlier post the early ones said "315FM" so I am guessing that the early are an FM (Frequency Modulation) and the later ones are an AM (Amplitude Modulation). Just my guess, but that might be the difference between them and why they don't interchange.

I am not sure why yours don't work, but like others have said, the sensors may be bad (although getting 4 that don't work would be unusual), or they are the wrong ones to match up to your receiver, or the ones made by Orange Electronics need a very strong magnet or have a different way to program them (like the C6 ones need a programming tool).

Good luck.

 

Interesting--FM and AM would definitely not communicate with each other. That may be THE answer.

 

Hah! Maybe there's also a switch that will change it from channel 3 or 4.

I have to go back by the tire store that did the installation because of a slow leak in one of the tires so, maybe I can get a look and see if there is any info on the sensor itself when they break it down.

Sonny

 

Since the TPMS sensors transmit a DIGITAL signal to the RF receiver in the vehicle, your guess about AM or FM does not apply.

 

Well, there ya go.

Just for grins, I stopped by the local Chevy dealer on the way into work and had them give it a try. They brought out their big green handheld device and basically went through the same procedure I did with my magnets and they too had no luck getting them to read.

One of the techs said he remembered a TSB on the subject of after market wheels blocking the TPMS signal and one of his co-workers backed him up on it. I should have asked to see the TSB but, I had to get on to work so, maybe if some one that has access to those could look it up...



At least there was no charge.

Sonny

 

As far as I know,,,,,,,,, there are NOT any devices that can ACTIVATE a C5 TPS other than a MAGNET. The C6 sensors can be activated by a hand held sensor scan tool but,, the C5...... I do not think so. I could be wrong but,,, I seriously doubt it.

You need to use a magnet to trip the reed switch inside the sensor to turn that sensor on so the Remote Function Actuator can receive its transmitted sensor data.

Do your FOBs work? Read your DTCs and see if you have any BCM or RFA DTCs

READING YOUR Engine Diagnostic Codes (DTCs)
The Diagnostic Display Mode is entered with the following procedure:
1) Turn on the ignition but don't start the engine.
2) Press the RESET button to turn off any warning messages. (i.e. door open, trunk open etc…)
3) Press and hold OPTIONS
4) While holding OPTIONS, press FUEL four times within a 10-second period.

Initially, on-board diagnostics go into an Automatic Mode which shows diagnostic codes in a pre-set sequence: PCM - TCS - RTD - BCM - IPC - RADIO - HVAC - LDCM - RDCM - SCM - RFA. All codes will be displayed for each. ( i.e. PCM = 4 codes)
If none are present in a given module, you will see No More Codes on the display.
There are two kinds of diagnostic codes, Current and History designated with a letter suffix, C or ;H. A current code indicates a malfunction is present in the module displaying data. A history code indicates a problem existed sometime in the last 40 or 50 ignition cycles. When not accompanied by a current code of the same number, it's potential evidence of a previous problem, now resolved, that was not removed by clearing the codes.
More likely it's an indication of an intermittent malfunction.
Intermittent codes are the most challenging of the diagnostics. An intermittent code may have happened once, may have happened more than once but is inconsistent or may be happening on a regular basis but not at the time the codes are displayed. History codes can also be caused by a current malfunction in a system that is not operating at the time codes are displayed. An example is the rear window defogger which doesn't operate until the Body Control Module detects engine rpm. For history codes set by a module that does not operate with the key on and engine off, a special diagnostic tool called a Scan Tester is necessary to properly diagnose the malfunction.
Once the system has displayed all modules, it goes into the manual mode which allows selection of each module using combinations of Driver Information Center buttons. Manual mode can also be entered during the automatic sequence by pressing any button except E/M. Once the display shows Manual Diagnostics, select a module by pressing the OPTIONS button to go forward or the TRIP button to go back. Once a module is selected, a code is displayed, and if more than one are present;
press GAGES to go forward or FUEL to go back.
To exit the diagnostic mode at any time, press E/M. If you want to erase codes in a given module, press RESET
To reset the codes once in manual mode, press and hold RESET until it displays NO CODES Press OPTIONS to go to the next module. Repeat the steps until you have reset the codes in all the computer modules.
NOTE!! Only reset the codes IF you want to - it is NOT necessary to do this. Clearing a code does not repair a problem. You are simply erasing the evidence of it in the module's memory. If you clear the code/s, and extinguish the Check Engine Light, your emissions status ready will NOT allow you to pass an emissions test until you have completed the required driving cycles.
Once you have the codes, the next question is: What to do with the information?
First, consult the factory service manual. Any serious C5 Do-It-Yourself owner should invest in the Corvette Service Manual of the appropriate model year. The Service Manual is really a requirement if you want to understand and work on your C5.

Here is very good site of DTC definitions:


http://www.gearchatter.com


Make sure to include the H or C suffix!!