Key Fob/tpms
Thread Starter
Cruising
Joined: May 2012
Posts: 12
Likes: 0
From: Wantrage NJ
Key Fob/tpms
Had tpms replaced over the weekend and tried to learn to computer using magnet and instructions from forum....no luck. (the tpms were purchased new aftermarket in late 2012 and just installed, but stored in my house) Also noticed that neither of my key fobs are working. I was wondering if these 2 issues are related or separate. Neither of them are a major big deal DEAL, BUT BOTH CAN BE ANNOYING. Thanks in advance for any feedback. This is on a 2000 c5
Team Owner
Joined: Jul 2006
Posts: 22,163
Likes: 4,171
From: Kannapolis NC
The 2000 fobs are known to be a problem. There is a fix by soldering the connections in the fob that can be found by searching "legendary problem solved" (I use Google). Check to be sure the TPMS you installed are compatible with the pre 2001 TPMS system and if they are, you may just need a larger magnet or putting the magnet in a different position. A good move would have been to program them before you had them installed, but that's a little late now. Post the codes 8vette7 suggested above, but you may have two separate problems even though they use the same receiver.
Thread Starter
Cruising
Joined: May 2012
Posts: 12
Likes: 0
From: Wantrage NJ
thanks for the feedback. I am sure the tpms purchased were for the 2000. The new wheels I had purchased had 01 sensors and would not work so that was the reason for purchase of new tpms. I will check the DIC codes later and post. In retrospect... yes I should have programmed sensors before installing. I always have learned the hard way. Thanks again for the feedback.
Thread Starter
Cruising
Joined: May 2012
Posts: 12
Likes: 0
From: Wantrage NJ
thanks for the feedback. I am sure the tpms purchased were for the 2000. The new wheels I had purchased had 01 sensors and would not work so that was the reason for purchase of new tpms. I will check the DIC codes later and post. In retrospect... yes I should have programmed sensors before installing. I always have learned the hard way. Thanks again for the feedback.
Team Owner
Joined: Jul 2006
Posts: 22,163
Likes: 4,171
From: Kannapolis NC
Ok...have not had time to check codes..but spoke to a rep from tpms company. He told me that the tpms have sleep modes in which they will not be able to be programmed. He said that if there was more than about a 1/2 hr. from when tpms was mounted and tire and inflated...to when I tried to learn tpms, that it is very possible that tpms was in the sleep mode. He suggested deflating the tires, re inflating and then try to program. His theory was that the change in air opresure will "wake up" the sensor. Has any one ever heard of this before? He sounded pretty confident in what he was saying, and did actually call after the purchase was over 1 year ago. I will try on left front first and see what happens? Any thoughts?
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
The sleep mode is normal for the sensors so if they are not using battery power when the car is not being driven. They go into this mode when the wheel has not rotated for one minute, at least that is for OEM GM sensors per the FSM.
I think he is full of crap about air pressure "waking" them up.
The magnet should override this to allow programming.
So you have time to screw with tire pressures but not pull your codes so we can see what the heck is going on?
I think he is full of crap about air pressure "waking" them up.
The magnet should override this to allow programming.
So you have time to screw with tire pressures but not pull your codes so we can see what the heck is going on?
Thread Starter
Cruising
Joined: May 2012
Posts: 12
Likes: 0
From: Wantrage NJ
Yes...guess I should check codes...also will try a bigger magnet..this guy also suggested a magnet about 1/2" thick...I was not using one as strong as that..maybe part of problem....I thought the air down thing sounded a bit sketchy....have read a lot about this issue on hear but never heard of that....that's why I asked...thanks for the info will get codes when have time and post
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Tech Contributor
Joined: Dec 1999
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
There is a FOB "RELEARN" and "FOB SYNC" procedure. Try to resync your FOBs
Press the LOCK & UNLOCK buttons and Hold them until the horn toots.
If that fails, try to RELEARN all your FOBs. That procedure is in the Ownes Manual
That might get rid of one of your issues. I agree with reading the DTCs. If you have NO COMMS for the RFA module for what ever reason, nothing will work for the TPMS or FOBs
Bill
Press the LOCK & UNLOCK buttons and Hold them until the horn toots.
If that fails, try to RELEARN all your FOBs. That procedure is in the Ownes Manual
That might get rid of one of your issues. I agree with reading the DTCs. If you have NO COMMS for the RFA module for what ever reason, nothing will work for the TPMS or FOBs
Bill
Thread Starter
Cruising
Joined: May 2012
Posts: 12
Likes: 0
From: Wantrage NJ
There is a FOB "RELEARN" and "FOB SYNC" procedure. Try to resync your FOBs
Press the LOCK & UNLOCK buttons and Hold them until the horn toots.
If that fails, try to RELEARN all your FOBs. That procedure is in the Ownes Manual
That might get rid of one of your issues. I agree with reading the DTCs. If you have NO COMMS for the RFA module for what ever reason, nothing will work for the TPMS or FOBs
Bill
Press the LOCK & UNLOCK buttons and Hold them until the horn toots.
If that fails, try to RELEARN all your FOBs. That procedure is in the Ownes Manual
That might get rid of one of your issues. I agree with reading the DTCs. If you have NO COMMS for the RFA module for what ever reason, nothing will work for the TPMS or FOBs
Bill
Le Mans Master
Joined: Jun 2009
Posts: 6,528
Likes: 752
From: South Dakota
Like others have said read and post the DTCs and try the relearn and fob sync.
You should also state the brand of TPMS sensors too. I think one brand of aftermarket sensor is trained by dropping the tire air pressure 5 or 10 lbs. quickly
You should also state the brand of TPMS sensors too. I think one brand of aftermarket sensor is trained by dropping the tire air pressure 5 or 10 lbs. quickly