Strange TPMS problem
first of all, let me introduce myself: I live in Hungary, Europe, and I'm a proud owner of two Corvettes, a 1991 minirammed, hotcammed C4 and a 2005 C6 MN6 Z51. Since I have the C6 (for 4 months now), the TPMS did not work at all. We only have one dealership in Hungary, and they were not able to find a solution. I've seaerched the forum, and found out, that if there's a problem, the DIC will show you XXX pressure. But that's what I see on the DIC (see the attached picture): exactly nothing. Did anyone encounter the same problem, is there a proper solution for that?

thanks/Sebaj
first of all, let me introduce myself: I live in Hungary, Europe, and I'm a proud owner of two Corvettes, a 1991 minirammed, hotcammed C4 and a 2005 C6 MN6 Z51. Since I have the C6 (for 4 months now), the TPMS did not work at all. We only have one dealership in Hungary, and they were not able to find a solution. I've seaerched the forum, and found out, that if there's a problem, the DIC will show you XXX pressure. But that's what I see on the DIC (see the attached picture): exactly nothing. Did anyone encounter the same problem, is there a proper solution for that?

thanks/Sebaj
That sounds like a great pair of Vettes that you have!!!!

First, let me ask you: Are you sure the tires/wheels have sensors in them?
Second: Is your C6 a European spec car - was it built for delivery in Europe, or did you buy it from the U.S. and have it imported?
The reason I ask is because the Tire Pressure Monitor System (TPMS) and sensors are different for a U.S car than for one built for Europe.
If you check the list of RPO codes on the sticker on your glove compartment door and see "UJ9" in the list, then the car was built to U.S./Canada specs.
If you don't have "UJ9" but have "UH3" then your car was built to European specs.
Those RPO codes are for 2 different TPMS computers in the car.
In the U.S., tire pressure sensors are mandatory, and if you don't have them then the TPMS will not let you turn off the Active Handling (AH) or go into Comp mode.
I bet you have a Euro spec car, and maybe the UH3 TPMS will not interfere with the AH the way a U.S. car does, and that may be why it's not showing "xx psi" like you would see in a U.S. car.
The TC/AH button (Traction Control/Active Handling) on the console will let you turn off TC, or you can go into Comp mode, or turn AH off completely. One push of the button turns off TC, a second push of the button puts you in Comp mode (AH still on, but doesn't interfere as much), and if you push the button down and hold it for about 10 seconds AH will turn off completely. You'll see messages in the DIC telling you what mode you are in when you push the button.
Are you able to go into Comp mode and turn AH off completely???
In a U.S. spec car you can't do that if you have no sensors, or they are not registered (programmed) with the TPMS computer in the car.
So.....If you have sensors in your tires, I bet they just need to be registered/programmed into the TPMS computer so the TPMS recognizes them like you can see in the video link below.
Your dealership should have the tool in the video below. It's a standard GM tool that they use to program the sensors in all GM vehicles and it's called the J-46079. A couple years ago I had 2 of them and made the video so I could sell the tools. In the first part of the video you can see a C6 sensor, which is the gray colored for the U.S. sensors. Sensors for a European C6 are orange in color. The last part of the video shows how to put the car into the "learn mode" and actually register the sensors:
Click here for video of the GM Tire Sensor/TPMS Tool J-46079
I hope all the info will help you.
BTW, I love Budapest!!! I used to fly for Pan Am and then Delta, and Budapest was one of my favorite European layovers. My wife loves Budapest too and used to fly on trips with me when I had a Budapest trip. We used to stay in the Hilton on the Buda side of the Duna and it was a beautiful hotel with a beautiful view looking down on the river. I'm retired now, but I miss Budapest. Maybe I'll have to come over and visit you some time!!!
Let me know if you have any questions about the sensors or the TPMS.
Bob
it's nice to hear, that you've enjoyed your stays in Budapest, hopefully you will have the opportunity to come again, I would be glad to see you!

Thank you for the information, it was very helpful indeed. My car is a European spec one(UH3), and I can activate Comp Mode, or deactivate the whole system without any issue. The dealer has the special tool as described by you, they tried three times, but the sensors won't communicate. It's a good point however, to check, if there are any sensors installed in the wheels at all, or maybe, the US pec ones have been installed instead of the European ones. I assume, that I will not be able to check it visually, so I have to go to a tire shop, and let them check. I'll give a feedback anyhow. Thanks again!
Sebaj
Here's a picture of a gray U.S. sensor and a stock wheel:
You might be able to see the number 25758220 molded into the case of the sensor - that's the GM Part# for a U.S. sensor.
For a Euro spec car the sensor would be orange in color and the GM Part# is 25758221 , the last digit is a "1" instead of "0".
The tire pressure sensors have a radio transmitter in them to send the data to the TPMS computer in the car. U.S. sensors transmit to the TPMS on 315 mHz, but the sensors on a European car transmit on 433.925 mHz. That's why the TPMS computer in the car is different for a U.S. or European car.
You can see that the valve stem is part of the sensor. If you have rubber valve stems, then there probably aren't any sensors in your wheels.
Do you have the stock wheels?
Many aftermarket wheels do not have the holes to mount the sensor in the manner they are mounted in a factory wheel. In some exotic aftermarket wheels the sensors must be mounted inside the wheel with a long strap, or some are mounted with a bracket. So, if you have some wheels that are not original equipment either there are no sensors or they may be deep inside the wheel.
When doing a "relearn procedure" to register/program the sensors, you must get the antenna of the tool within probably 10cm of the sensor. If the sensors are mounted inside the wheel you know exactly where they are in there so you can get the antenna of the tool as close as possible to "trigger" the sensor to get it send its data to the TPMS.
The video below shows using a tool almost exactly like the GM tool. I am do the relearn procedure by first putting the car into the learn mode, then I trigger each sensor with the tool. You can see that I put the antenna of the tool on the rubber sidewall of the tire right next to the valve stem to get it as close to the sensor as possible.
Your dealership should be able to do the same thing with their J-46079 tool. You can also just check the sensors - you don't need to put the car into the learn mode. Just walk up to the car, put the antenna on the tire next to the valve stem and activate the tool, and the screen on the tool should display the sensor's info - ID#, tire pressure, sensor battery strength, and the frequency the sensor transmitted on (433.92 for your European sensors). Perhaps your dealership just doesn't know how to use the tool!

Good luck with your sensors!!!!
Bob
That sounds like a great pair of Vettes that you have!!!!

First, let me ask you: Are you sure the tires/wheels have sensors in them?
Second: Is your C6 a European spec car - was it built for delivery in Europe, or did you buy it from the U.S. and have it imported?
The reason I ask is because the Tire Pressure Monitor System (TPMS) and sensors are different for a U.S car than for one built for Europe.
If you check the list of RPO codes on the sticker on your glove compartment door and see "UJ9" in the list, then the car was built to U.S./Canada specs.
If you don't have "UJ9" but have "UH3" then your car was built to European specs.
Those RPO codes are for 2 different TPMS computers in the car.
In the U.S., tire pressure sensors are mandatory, and if you don't have them then the TPMS will not let you turn off the Active Handling (AH) or go into Comp mode.
I bet you have a Euro spec car, and maybe the UH3 TPMS will not interfere with the AH the way a U.S. car does, and that may be why it's not showing "xx psi" like you would see in a U.S. car.
The TC/AH button (Traction Control/Active Handling) on the console will let you turn off TC, or you can go into Comp mode, or turn AH off completely. One push of the button turns off TC, a second push of the button puts you in Comp mode (AH still on, but doesn't interfere as much), and if you push the button down and hold it for about 10 seconds AH will turn off completely. You'll see messages in the DIC telling you what mode you are in when you push the button.
Are you able to go into Comp mode and turn AH off completely???
In a U.S. spec car you can't do that if you have no sensors, or they are not registered (programmed) with the TPMS computer in the car.
So.....If you have sensors in your tires, I bet they just need to be registered/programmed into the TPMS computer so the TPMS recognizes them like you can see in the video link below.
Your dealership should have the tool in the video below. It's a standard GM tool that they use to program the sensors in all GM vehicles and it's called the J-46079. A couple years ago I had 2 of them and made the video so I could sell the tools. In the first part of the video you can see a C6 sensor, which is the gray colored for the U.S. sensors. Sensors for a European C6 are orange in color. The last part of the video shows how to put the car into the "learn mode" and actually register the sensors:
Click here for video of the GM Tire Sensor/TPMS Tool J-46079
I hope all the info will help you.
BTW, I love Budapest!!! I used to fly for Pan Am and then Delta, and Budapest was one of my favorite European layovers. My wife loves Budapest too and used to fly on trips with me when I had a Budapest trip. We used to stay in the Hilton on the Buda side of the Duna and it was a beautiful hotel with a beautiful view looking down on the river. I'm retired now, but I miss Budapest. Maybe I'll have to come over and visit you some time!!!
Let me know if you have any questions about the sensors or the TPMS.
Bob

I bought the green tool, took it out of the box and had all of my sensors reprogramed in no time.
Good luck at the dealership getting the sensor "relearn procedure" done!
I'm sure a Chevrolet dealer will have the official GM tool, the Kent-Moore J-46079. It looks exactly like that Isuzu tool in the video in Post#4 above, and they'll use it in the same manner.
Make sure before they try to program the sensors that they put the car into the "learn mode" like you see in the video - push the bottom of the ignition switch to get a yellow light by ACC (put the ignition in Accessory mode), then push and hold both the "lock" and "unlock" buttons on the fob until you hear a honk of the horn confirming you're in the learn mode.
After the car is in the learn mode you only have 1 minute to trigger the first sensor (Left Front wheel) or it will go out of the learn mode.
When they trigger each sensor make sure they put the tip of the tool's antenna on the rubber side of the tire right next to the valve stem like you see in the video and activate the tool.
You MUST get a honk of the horn at each wheel - if the horn doesn't honk then the TPMS computer did not receive the data from the sensor. Do the Left Front first, next the Right Front, then the Right Rear, and finally the Left Rear. You'll get one honk at the first 3 wheels, and 2 honks at the last one confirming all 4 sensor ID#s are logged into the TPMS computer memory. Then turn off the ignition to complete the procedure.
So.....if you know how to do the procedure, you may know more than the dealership mechanic!
You have to put the car into the learn mode no matter what tool they use. Like Ryan said, some tools may take longer to find out the proper signal to send to the C6 sensors. If it takes more than 1 minute on the Left Front the learn mode will stop. The tool may still trigger the sensor after 1 minute and the tool may beep and lights may flash, but if the horn doesn't honk then it took too long and the car is no longer in the learn mode.
If that happens, just put the car into the learn mode again and try the procedure again. The tool should trigger the sensor quickly now that it knows the signal to use.
BTW, all these tools run batteries down quickly. Make sure the dealer has strong fresh batteries in the tool.
Good luck!
Bob
The Best of Corvette for Corvette Enthusiasts
They should be able to use almost any of those tools on C6 sensors. Our sensors require only a simple "continuous wave" transmission from the tool - and most any tool will transmit that signal. Some sensors require special "Morse code" type pulses, but the C6 does not.
If you really want to, you can get your own tool for U.S. $90, plus shipping.
I don't know if they will ship to Hungary or not. If you really want one, I'd be happy to help you by taking delivery and then shipping on to you.
I don't know what the shipping is, but if you're interested in your own tool let me know and I'll help out any way I can.
Send me a PM if you want more info.
Bob
update: tire pressure sensors have been set by an independent tire shop. Everything works perfectly. I will never ever go back to the only official dealer in Hungary. Thanks for your efforts again!!!
Regards/sebaj
Glad you got everything working properly. When you have a tool and know the procedure, it only takes a minute or two to program the sensors.
Here's to much enjoyment of your C6!
Bob
great thread as I have a dead TPMS and this has helped no end with regards to checking UK/US build!
Something of an issue is the TIP tools here cost a fortune, as are the sensors (over $120). Doing a search I found something called the EZ TPMS which is made by Schrader (OEM). The new TPMS is supplied blan and using a tool you can copy your existing TPMS ID and operating stuff to the new blank one, this means no need to do a TPMS reset.
In the UK you can send your TPMS off to have it copied and sent back
A compatibility chart is available here: http://www.tyre-equipment.co.uk/acat...TY%20CHART.pdf
The sensors are a lot cheaper (£35 or around $50) and with the advantage of never having do a relearn with a swap. It wll cost me less to buy 4 of these sensors and the programming tool than 4 standard ones and a TIP.
There is a US/International site http://www.ez-sensor.com/ too
Not sure if this will be of help to anyone but if it does help....
Note, throw in the clone TPMS, and it could be a completely different reset tool needed to clone and trigger them.
Also, with a vet, you have to first figure out if it is a domestic, or export model to begin with, since the RCDLR is different in the car (what receives the TPMS signal ,and again a total of 4 different receiver in the C6), since there are some exports in the states, and domestic models that have been shipped abroad.
So here in the colonies, it just a matter of what year the domestic model is, and the choice is one of two or two OEM.
Abroad, becomes a guessing game to first figure out if the car is a domestic or export model (what RCDLR in in the car), then after than, comes down to what year model TPMS is required instead (and what reset tool is required). To add, the after market USA model reset tools may not reset/trigger an export model TPMS.
http://www.zip-corvette.com/05-13-c6...re-sensor.html
Last edited by Dano523; Apr 17, 2015 at 05:49 PM.
As stated the EU TPMS is orange in colour and is OE code 25758221 which is a Schrader Gen J unit, there is another code which are 0109317 which may help if you look for an alternative.















