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Installing Schrader TPMS

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Old Mar 12, 2020 | 08:09 PM
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Default Installing Schrader TPMS

Bought these Schrader 28006 TPMS’s from rockauto for my 98 (TPMS link ). Tire shop said he couldn’t get them to register, so he never installed them. Said he tried the magnet and his scanner? Didn’t go back to ‘98. Can you learn them to the car without putting them on? I read an older post where people said rockauto sometimes sold old stock and the batteries may be dead. The box date says 9/13/2019 so I’m assuming they are good. I did a replacement through their website before seeing the date code on the box, so I have 4 more coming.
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Old Mar 12, 2020 | 08:20 PM
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You can see if they will program without mounting them.Just make sure you have a strong enough magnet.An old speaker magnet works great!
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Old Mar 12, 2020 | 08:43 PM
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It's highly unlikely all 4 are bad. Are you the original owner? was the TPS system updated to the newer version?
I bought the same for my 99 and installed them myself and programmed them with the donut magnet, no issues.
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Old Mar 13, 2020 | 04:02 AM
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Not the original owner. Didn’t know anything about a newer version of the TPS. What’s that?
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Old Mar 13, 2020 | 04:27 AM
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My remote fobs do not work. Does that have any bearing in the TPSM? Doing some searching on here and just read a thread where the fobs and TPS were discussed together
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Old Mar 13, 2020 | 06:54 AM
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Originally Posted by pjdbm
It's highly unlikely all 4 are bad. Are you the original owner? was the TPS system updated to the newer version?
I bought the same for my 99 and installed them myself and programmed them with the donut magnet, no issues.
Same here on my '98.
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Old Mar 13, 2020 | 08:05 AM
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Originally Posted by ScarolinaZ06
Not the original owner. Didn’t know anything about a newer version of the TPS. What’s that?
some 97-00 C5 owners elected to change over to the 01-04 system. The reason is the TPS are much cheaper.

Last edited by pjdbm; Mar 13, 2020 at 08:06 AM.
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Old Mar 13, 2020 | 09:05 AM
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I have multiple sets of wheels so that requires reprogramming every time they're changed. I have to spin the tire to wake the sensor before using the magnet. It won't work for me using the magnet alone after the car has been sitting still.
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Old Mar 13, 2020 | 10:50 AM
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You mentioned the fobs won't work either.Have you tried to reprogram those?
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Old Mar 13, 2020 | 11:17 AM
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I have not. They don’t give me a display every time I get in the car. If they did, they would be in the list. That service message drives me nuts 😂😂


I went to Lowe’s this morning and bought a nice doughnut magnet and will try to program them myself. Maybe I’ll have better luck than the tires shop
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Old Mar 13, 2020 | 11:29 AM
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Sometimes the magnet won't work if it is placed around the valve stem.You can try it on the top of the sensor and see if that helps.
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Old Mar 13, 2020 | 11:36 AM
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Thanks!


so from an earlier post...I should be able to program the sensors not installed right?
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Old Mar 13, 2020 | 11:41 AM
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That is correct!
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Old Mar 13, 2020 | 11:49 AM
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Originally Posted by ScarolinaZ06
My remote fobs do not work. Does that have any bearing in the TPSM? Doing some searching on here and just read a thread where the fobs and TPS were discussed together
Communications from both, TPMS and FOB, are handled by the same module. It is the Remote Function Adapter (RFA) module, number 3 in diagram below.

As you may know, some people have upgraded their 97-00 systems to the 01-04. Did you make sure that your new TPMS sensors are the same type as the old ones they were intended to replace?


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Old Mar 13, 2020 | 12:00 PM
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The old ones are still in the tires, so I can’t look at them.

I checked the part numbers against the numbers for a 2001 corvette, mine are different so I feel I ordered the right sensor
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Old Mar 13, 2020 | 12:20 PM
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Originally Posted by ScarolinaZ06
The old ones are still in the tires, so I can’t look at them.

I checked the part numbers against the numbers for a 2001 corvette, mine are different so I feel I ordered the right sensor
What I meant is that there is a possibility your 98 system was upgraded by a previous owner to the 01-04 system, so an old model TPMS won't work anymore.

What type are your FOBs, the old ones or the new ones?
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Old Mar 13, 2020 | 12:23 PM
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Not sure how to tell the difference. The one I have has that passive mode(?) slider on them. Only have one fob. It’s at home or I’d send a picture
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Old Mar 13, 2020 | 01:17 PM
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Originally Posted by ScarolinaZ06
Not sure how to tell the difference. The one I have has that passive mode(?) slider on them. Only have one fob. It’s at home or I’d send a picture
That should be the earlier model, so at least it matches with the new TPMS sensors you bought.

It seems you're up for some troubleshooting: neither the FOB nor the TPMS work... the common denominator would be the RFA module. Do you have any error code related to this system? I suggest you should begin there.

The RFA module (AKA: RCDLR) receive power through Fuse 27. It would be good to test it:



Last edited by GCG; Mar 13, 2020 at 01:31 PM.
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Old Mar 13, 2020 | 01:27 PM
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I would find that as current error code in the DIC right?


thanks for the info
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Old Mar 13, 2020 | 01:32 PM
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Yes, through the DIC (current and/or history). Also, check the info about Fuse 27 I just added to my previous Post.

Last edited by GCG; Mar 13, 2020 at 02:39 PM.
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