TPMS Help
Thread Starter
Instructor
Joined: Apr 2010
Posts: 170
Likes: 9
From: Kings Mountain, NC
TPMS Help
Hey guys, installed new wheels and rear tires and did new TPMS sensors. Drove the car a little and what do you know the lovely "SERVICE TIRE MONITOR" light came on. Now I know I can do the PVC trick to maybe fix the issue. Which if I do end up going that route may need some help in how to make one of these. But my 2 questions are
1. Will having the old TPMS and the new TPMS in the same 30-40 feet be an issue?
2. Anyway I can disable the new ones that are in my tires and just use the other set of TPMS in the PVC tube?
I used the stock front tires and did Toyo R888 305 on the rear. I believe I have read that having such a difference in the tire sizes causes the computer to do what it is doing, am I right on this?
Thanks for any help guys.
1. Will having the old TPMS and the new TPMS in the same 30-40 feet be an issue?
2. Anyway I can disable the new ones that are in my tires and just use the other set of TPMS in the PVC tube?
I used the stock front tires and did Toyo R888 305 on the rear. I believe I have read that having such a difference in the tire sizes causes the computer to do what it is doing, am I right on this?
Thanks for any help guys.
Le Mans Master
Joined: Aug 2000
Posts: 6,486
Likes: 1,659
From: Las Vegas NV
Hey guys, installed new wheels and rear tires and did new TPMS sensors. Drove the car a little and what do you know the lovely "SERVICE TIRE MONITOR" light came on. Now I know I can do the PVC trick to maybe fix the issue. Which if I do end up going that route may need some help in how to make one of these. But my 2 questions are
1. Will having the old TPMS and the new TPMS in the same 30-40 feet be an issue?
ANSWER: No, no issue. Once you program the new set of sensors to the car, the old set is totally forgotten -- the car only can be 'married' with 1 set of TPMS at any given time. Any other TPMS sensors that might be in the area are totally ignored.
2. Anyway I can disable the new ones that are in my tires and just use the other set of TPMS in the PVC tube?
ANSWER: Yes. Just program the old set of TPMS to your car again, and all the 'new' TPMS in the tires will be totally forgotten.
I used the stock front tires and did Toyo R888 305 on the rear. I believe I have read that having such a difference in the tire sizes causes the computer to do what it is doing, am I right on this?
ANSWER: Such a shortage in rear tire diameter can clearly cause issues, but those issues would not be reported as "SERVICE TIRE MONITOR" -- for incorrect tire diameter issues, you would see "SERVICE ACTIVE HANDLING" or "TRAC CONTROL" or something similar.
Thanks for any help guys.
1. Will having the old TPMS and the new TPMS in the same 30-40 feet be an issue?
ANSWER: No, no issue. Once you program the new set of sensors to the car, the old set is totally forgotten -- the car only can be 'married' with 1 set of TPMS at any given time. Any other TPMS sensors that might be in the area are totally ignored.
2. Anyway I can disable the new ones that are in my tires and just use the other set of TPMS in the PVC tube?
ANSWER: Yes. Just program the old set of TPMS to your car again, and all the 'new' TPMS in the tires will be totally forgotten.
I used the stock front tires and did Toyo R888 305 on the rear. I believe I have read that having such a difference in the tire sizes causes the computer to do what it is doing, am I right on this?
ANSWER: Such a shortage in rear tire diameter can clearly cause issues, but those issues would not be reported as "SERVICE TIRE MONITOR" -- for incorrect tire diameter issues, you would see "SERVICE ACTIVE HANDLING" or "TRAC CONTROL" or something similar.
Thanks for any help guys.
Last edited by Kent1999; Jun 29, 2016 at 03:32 PM.
Thread Starter
Instructor
Joined: Apr 2010
Posts: 170
Likes: 9
From: Kings Mountain, NC
Le Mans Master
Joined: Aug 2000
Posts: 6,486
Likes: 1,659
From: Las Vegas NV
However, its been done by others here, and I'm sure a search would quickly yield the results you seek if you are determined to go that route. Let's be careful out there!
Race Director
Joined: Sep 2007
Posts: 16,557
Likes: 2,106
From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
Hey guys, installed new wheels and rear tires and did new TPMS sensors. Drove the car a little and what do you know the lovely "SERVICE TIRE MONITOR" light came on. Now I know I can do the PVC trick to maybe fix the issue. Which if I do end up going that route may need some help in how to make one of these. But my 2 questions are
1. Will having the old TPMS and the new TPMS in the same 30-40 feet be an issue?
2. Anyway I can disable the new ones that are in my tires and just use the other set of TPMS in the PVC tube?
I used the stock front tires and did Toyo R888 305 on the rear. I believe I have read that having such a difference in the tire sizes causes the computer to do what it is doing, am I right on this?
Thanks for any help guys.
1. Will having the old TPMS and the new TPMS in the same 30-40 feet be an issue?
2. Anyway I can disable the new ones that are in my tires and just use the other set of TPMS in the PVC tube?
I used the stock front tires and did Toyo R888 305 on the rear. I believe I have read that having such a difference in the tire sizes causes the computer to do what it is doing, am I right on this?
Thanks for any help guys.
Next is: When the sensors were installed, were they cloned or newly ID'd to the car?
Next is: Were the sensors checked for battery condition prior to installation?
Next is: Other than SERVICE TIRE MONITOR, what info is read for RR & LR?
To answer your questions. 1. Yes, if the sensors were cloned. No, otherwise.
2. You can do the relearn procedure starting with LF, RF, and then one of the old sensors and then the other.
However, fooling the system doesn't "fix" the problem other than avoiding the DIC message. You can just cycle out of the message or reset to avoid seeing it and not bother with the PVC tube deal.
Since you have the old sensors which are apparently still good, the simple method to "fix" the issue is to swap the new for the old ones. You don't need to remove the tire, just break the bead enough to R&R and air it up again. No rebalance needed.
I suspect the "new" sensors weren't really "new". There's a lot of that going on recently.
Thread Starter
Instructor
Joined: Apr 2010
Posts: 170
Likes: 9
From: Kings Mountain, NC
The first question to be asked is: What brand and PN were the new sensors and where were they purchased?
Next is: When the sensors were installed, were they cloned or newly ID'd to the car?
Next is: Were the sensors checked for battery condition prior to installation?
Next is: Other than SERVICE TIRE MONITOR, what info is read for RR & LR?
To answer your questions. 1. Yes, if the sensors were cloned. No, otherwise.
2. You can do the relearn procedure starting with LF, RF, and then one of the old sensors and then the other.
However, fooling the system doesn't "fix" the problem other than avoiding the DIC message. You can just cycle out of the message or reset to avoid seeing it and not bother with the PVC tube deal.
Since you have the old sensors which are apparently still good, the simple method to "fix" the issue is to swap the new for the old ones. You don't need to remove the tire, just break the bead enough to R&R and air it up again. No rebalance needed.
I suspect the "new" sensors weren't really "new". There's a lot of that going on recently.
Next is: When the sensors were installed, were they cloned or newly ID'd to the car?
Next is: Were the sensors checked for battery condition prior to installation?
Next is: Other than SERVICE TIRE MONITOR, what info is read for RR & LR?
To answer your questions. 1. Yes, if the sensors were cloned. No, otherwise.
2. You can do the relearn procedure starting with LF, RF, and then one of the old sensors and then the other.
However, fooling the system doesn't "fix" the problem other than avoiding the DIC message. You can just cycle out of the message or reset to avoid seeing it and not bother with the PVC tube deal.
Since you have the old sensors which are apparently still good, the simple method to "fix" the issue is to swap the new for the old ones. You don't need to remove the tire, just break the bead enough to R&R and air it up again. No rebalance needed.
I suspect the "new" sensors weren't really "new". There's a lot of that going on recently.
Ok, thanks for the info....I have read that if your car is parked 30,40 feet from the old sensors that they can read off of that and not show the message anymore? Not sure but I know I went to get the car aligned yesterday and no message in the DIC, Car is parked in the shop near that stuff..Very strange but we will see how long this works and go from there I guess
Race Director
Joined: Sep 2007
Posts: 16,557
Likes: 2,106
From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
Ok, thanks for the info....I have read that if your car is parked 30,40 feet from the old sensors that they can read off of that and not show the message anymore? Not sure but I know I went to get the car aligned yesterday and no message in the DIC, Car is parked in the shop near that stuff..Very strange but we will see how long this works and go from there I guess
Clonable sensors are great for people who swap back and forth wheels for specific uses, such as racing or snow, etc.
So are you now getting pressure readings on the DIC for those wheels?
Thread Starter
Instructor
Joined: Apr 2010
Posts: 170
Likes: 9
From: Kings Mountain, NC
The only time the car can read sensors other than the 4 that were in the most recent relearn procedure, is when one or more of them are cloned sensors and in close proximity to the other previous sensors. Not all sensors are clonable (most aren't), but that's why I asked what brand you purchased. At this time AFAIK the only clonable brands are Titan and Orange Electronics There is a specific procedure to do the cloning prior to doing a relearn, otherwise they work like any other sensor.
Clonable sensors are great for people who swap back and forth wheels for specific uses, such as racing or snow, etc.
So are you now getting pressure readings on the DIC for those wheels?
Clonable sensors are great for people who swap back and forth wheels for specific uses, such as racing or snow, etc.
So are you now getting pressure readings on the DIC for those wheels?
when I drove it yesterday, no sensors came on at all. PSI reading is right as well. So either they are working now or the old sensors are close enough. I am not sure what procedure or brand they used but I know they were new. I would have to check the box and see the brand.
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Team Owner
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I didn't see in the original post that the new sensors were programmed to the car. In this case the situation is not unexpected at all. When the car is in the garage with the old wheels nearby, it still picks them up and reports their pressure correctly. As you drive away from the garage, the computer will continue to display correctly those old sensors until the car is driven about 20 miles, then the light will come on and all four will display XX. When you come home, the car will again hook up to those old sensors and all will be fine for another 20 miles. To test, lower the pressure in one of the old tires to 20 psi, then see what the car says next time you drive it. Also, if you never go too far from home, the system will continue to read those old sensors and will never notify you. All will appear fine. But it's not. If you get the new sensors programmed to the car, it will then ignore the old sensors just as it is doing with the new ones now.
Last edited by cclive; Jun 30, 2016 at 04:06 PM.