Tire pressure warning system issues...
Thread Starter
Instructor
Joined: Oct 2007
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From: Western Neu Yawk
Tire pressure warning system issues...
Not sure just how to 'splain this but I'll give 'er a shot. I've searched the archives with no luck.
My car has the sensors and the system is, apparently, intact.
When attempting to 'read' the pressures with the DIC I get all "x's" instead of "-'s". I've tried the magnet method as has a buddy of mine, no joy with the 'recognition' of any of the valves.
Does this system require a Tech2 to turn the option on in the BCM since it's apparently been 'turned off' somehow?
Is this something I can do with my Diablo Predator (new model, 7198) ?
Thanks in advance for any insight,
Jim
My car has the sensors and the system is, apparently, intact.
When attempting to 'read' the pressures with the DIC I get all "x's" instead of "-'s". I've tried the magnet method as has a buddy of mine, no joy with the 'recognition' of any of the valves.
Does this system require a Tech2 to turn the option on in the BCM since it's apparently been 'turned off' somehow?
Is this something I can do with my Diablo Predator (new model, 7198) ?
Thanks in advance for any insight,
Jim
Safety Car
Joined: Jul 2001
Posts: 4,661
Likes: 67
From: Ocean Springs MS
No, you can't do it with a Predator. You can only turn it off and on on 2001 and later cars, and you must use a Tech 2. Since you provided no model year info in your post or profile, it make things difficult. There are two different systems depending on model year. Your batteries might also be dead, requiring new sensors.
Burning Brakes
Joined: Dec 2003
Posts: 1,066
Likes: 9
From: Eddy Texas
Do your keyfobs work? They use the same RFA reciever as the TPMs. If they do work, then you either haven't got them trained properly, or you have bad sensors.
What year is your car?(how old are the sensors, they only have a 7-10 yr life)
What year is your car?(how old are the sensors, they only have a 7-10 yr life)
Thread Starter
Instructor
Joined: Oct 2007
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From: Western Neu Yawk
Duh, I thought I knew better.
02 Vert. Fobs work fine. In fact I just trained two new ones.
None of the four TPMs will 'reset' with a magnet.
The DIC shows XXX instead of --- when I ask it to display the tire pressures AND I get 'service tire pressure warning system' occasionally.
Thanks folks,
Jim
02 Vert. Fobs work fine. In fact I just trained two new ones.
None of the four TPMs will 'reset' with a magnet.
The DIC shows XXX instead of --- when I ask it to display the tire pressures AND I get 'service tire pressure warning system' occasionally.
Thanks folks,
Jim
Burning Brakes
Joined: Dec 2003
Posts: 1,066
Likes: 9
From: Eddy Texas
May be a dumb ?, but are you training in the proper order?
LF RF RR LR. If the LF is bad and won't train, then you cannot finish the training of the other three, it must be done in the proper order for any of them to work.
LF RF RR LR. If the LF is bad and won't train, then you cannot finish the training of the other three, it must be done in the proper order for any of them to work.
Last edited by c5streak; Jul 20, 2008 at 04:46 PM.
Thread Starter
Instructor
Joined: Oct 2007
Posts: 122
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From: Western Neu Yawk
Thanks for the reply Streak but in reality the car doesn't care which you do first.
I've done them in several 'orders' and it doesn't make any difference.
But thanks for the idea. I'm fretting here.
Jim
I've done them in several 'orders' and it doesn't make any difference.
But thanks for the idea. I'm fretting here.
Jim
Le Mans Master
Joined: Feb 2002
Posts: 6,937
Likes: 21
From: Waldorf MD
Check your valve stems, do they have nuts on the outside bottom? If not, and they look like all rubber, normal valve stems, you do NOT have TPMS installed.
Your 2002 series II TPMS's should last 10 years minimum. They should be good until 2012 !
Your 2002 series II TPMS's should last 10 years minimum. They should be good until 2012 !
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
Not sure just how to 'splain this but I'll give 'er a shot. I've searched the archives with no luck.
My car has the sensors and the system is, apparently, intact.
When attempting to 'read' the pressures with the DIC I get all "x's" instead of "-'s". I've tried the magnet method as has a buddy of mine, no joy with the 'recognition' of any of the valves.
Does this system require a Tech2 to turn the option on in the BCM since it's apparently been 'turned off' somehow?
Is this something I can do with my Diablo Predator (new model, 7198) ?
Thanks in advance for any insight,
Jim
My car has the sensors and the system is, apparently, intact.
When attempting to 'read' the pressures with the DIC I get all "x's" instead of "-'s". I've tried the magnet method as has a buddy of mine, no joy with the 'recognition' of any of the valves.
Does this system require a Tech2 to turn the option on in the BCM since it's apparently been 'turned off' somehow?
Is this something I can do with my Diablo Predator (new model, 7198) ?
Thanks in advance for any insight,
Jim
The fact your fobs are working says the RFA (the radio reveiver/transmitter) is working
So either all 4 sensors have failed (not too likely on an '02) or your magnet isn't big enough (strong enough). Call around and locate magnets made from "Neodymium" .... often electronics supply shops have them. They are small and very powerful. I bought a package of 3 of them .... each about the size of a dime, for about $5.00 .... if you can't program the TPMS with one of them, the sensor is DEAD.
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Drifting
Joined: Jan 2006
Posts: 1,849
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From: Philadelphia PA
The fact you can get the DIC to display the programming pages says that the system is turned "on".
The fact your fobs are working says the RFA (the radio reveiver/transmitter) is working
So either all 4 sensors have failed (not too likely on an '02) or your magnet isn't big enough (strong enough). Call around and locate magnets made from "Neodymium" .... often electronics supply shops have them. They are small and very powerful. I bought a package of 3 of them .... each about the size of a dime, for about $5.00 .... if you can't program the TPMS with one of them, the sensor is DEAD.
The fact your fobs are working says the RFA (the radio reveiver/transmitter) is working
So either all 4 sensors have failed (not too likely on an '02) or your magnet isn't big enough (strong enough). Call around and locate magnets made from "Neodymium" .... often electronics supply shops have them. They are small and very powerful. I bought a package of 3 of them .... each about the size of a dime, for about $5.00 .... if you can't program the TPMS with one of them, the sensor is DEAD.
Those magnets are the best. Post a location; maybe someone nearby has what you need.
Thread Starter
Instructor
Joined: Oct 2007
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From: Western Neu Yawk
I've now tried a VERY powerful 'rare earth' magnet AND a super strong speaker magnet.
No joy.
I've tried making each of the individual sensors "first" in line.
Nada.
I'm in Penfield, Neu Yawk. Near Rochester.
Everyone has to be somewhere.
sigh.
Jim
No joy.
I've tried making each of the individual sensors "first" in line.
Nada.
I'm in Penfield, Neu Yawk. Near Rochester.
Everyone has to be somewhere.
sigh.
Jim
Last edited by BuffaloBillHisself; Jul 20, 2008 at 10:16 AM.
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
If you're certain you have sensors .... you are applying the magnet and holding it as close to the actual sensor as you can .... the sensor is inside the wheel ... the stem that sticks out is just that ... a stem.
Finally, call some local tire stores ... most good stores now have a tester similar to this .....
http://www.ateq.com/T.P.M.S/ATEQ_TPMS_Home.html
These "wake up" the sensor and even display the sensor data (serial number and absolute tire pressure .... so you'll see something like 45 PSI if you have 30 PSI in your tires). This is really the only way to really verify if they're working or not.
Thread Starter
Instructor
Joined: Oct 2007
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From: Western Neu Yawk
Yep, I watched the sensors as they were installed in the new wheels at the shop.
I also watched the guys at the shop attempt to 'flash' the sensors using the magnet/dic method.
I, of course, have done the same at home.
No joy.
I also watched the guys at the shop attempt to 'flash' the sensors using the magnet/dic method.
I, of course, have done the same at home.
No joy.
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
For model tears 1997 through 2000 the sensors transmit on a certain radio frequency. Starting with the 2001 Model Year the RFA and sensors were altered to use a different radio frequency. This means that the RFA and sensors have to "match" ... you can't use the "old" sensors on a 2001 or newer, and you can't use the "new" sensors on a 2000 or older.
Here are the GM part numbers for the sensors ... check your invoice and see if you have the correct ones ....
2001-2004 ....... 25773946
1997-2000 ....... 10438853
Burning Brakes
Joined: Dec 2003
Posts: 1,066
Likes: 9
From: Eddy Texas
The sensors are assigned, within the RFA, in the following order:
1)LF 2)RF 3)RR 4)LR.
The first one learned is assigned to the LF and will display as LF in the DIC, regardless of which tire it ACTUALLY is. The second will be RF, and so on.
So yes, you can do them in any order, but the DIC readout will not correspond to the correct tire.
I know this doesn't help in finding your trouble, but it may avoid confusion when you do get them to learn.
Thread Starter
Instructor
Joined: Oct 2007
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From: Western Neu Yawk
Thanks you guys. I'm on that mismatched sensor deal now. I'm thinking that the ones that were put in my car look a LOT like the larger ones that came in the earlier cars.
I know they won't work with my car so I'm going to look into that more closely.
Thank you again,
Jim
I know they won't work with my car so I'm going to look into that more closely.
Thank you again,
Jim
