The sensor in the tire that monitors air pressure does each sensor transmit a different freq ? What I mean is if you change tires that wheel needs to be place in the same location so your reading on the dash are correct. If I'm right what happens if you rotate the tires?

I just bought a CTS V and when i let air out of the LR tire it shows a change on the dash as the RF tire

 

The sensors each have a serial # which is learned by the car. When the sensors are learned by the car, that serial # is assigned to a specific location, i.e. LF, RF,etc. The reciever only cares about the serial#, not the actual location. You can do a relearn procedure to sync the sensor with the corresponding readout in the DIC. If you are rotating the tires on the Caddy, you will have to do this each time, in order for the readout to be correct.

 

First off, each sensor is transmitting a different signal to the computer. When you change the position of the sensor, it will follow the wheel and thus if you swap the right front with the left front, the dash will tell you the pressure for the incorrect position.

Now, since the C-5 has 17s " in the front and 18s" in the rear, and radials are tread is directional, there is no reason to rotate. In other words if you do swap the left front and right front, the tire will rotate incorrectly for the tread pattern.

 

Thanks guys I need to find out how to make the computer relearm the new locations.

Thanks again

 

Since this has nothing at all to do with CORVETTE C5's, I would respectfully suggest that you ask someone that has experience with a CTS-V, or possibly the Cadillac dealer. Just because you can perform a relearn process on a C5, doesn't mean that the same technique applies to the Cadillac. Have you looked in your owner's manual?

 

Owners manual doesn't talk about recalibrating pressure sensors. I will have to check with dealer but this forum did give me good information on how the sytem works.

Thanks again

 

Just to let you and everyone know; the C5 can be reprogramed with just a magnet you walk around and put on the valve. The C6 will require a special programing device that you will have to purchase or take your car to a shop that would have one.

 

The Caddie uses almost the same technique. I used the same magnet for my DTS as I did for the Vette. Just google TPS and CTs together and you should get hits for reprogramming.

Here ya' go
http://www.cadillacforums.com/forums.../t-118163.html

 

The magnet I use is one of those magnets on a stick that is used to pick up loose nails/screws - you can find tham at any home improvement or hardware store. Only takes a minute to reprogram all 4 tires - so easy a caveman could do it!

 

Today on my C5 RR it shows 8 pounds and says it's low. It's not though, it's got (cold) 28. I have a compressor and guages, so I've checked them all and they're the same. I took it for a ride and they all go up to 30, but the RR read 10. I have a magnet, can this sensor be reset or does it need to be replaced?

What/how do I do the magnet deal, to try and fix it? Thanks

 

how do you know if you have sensors?? i just got my C5 they don't read on the dash

 

Are the valve stems made of metal ?

 

i have metal stems

 

The sensors 'go to sleep' to save their batteries - try driving for a few miles first then check the gauges. Unless you have a Z06, you likely have the sensors.

 

I used this message forwarded from a fellow forum member and it worked just as described. Thought I would post for anyone else that may need to reset their TPMs. 1) Turn ignition on 2) Press "Reset" button in order to clear any IPC display warning messages 3) Press and release the "Options" button on the DIC to scroll through the display options until the IPC display is blank 4) Press and hold the DIC "Reset" button for 3 seconds 5) Press the "Options" button again until TIRE TRAINING message appears 6) Press "Reset" button until the IPC "Learn L Front Tire" message appears in order to begin the programming 7) Install the J41760 Tire Pressure Monitor (TPM) System Programming Tool (large magnet will do) over the left front valve stem 8) The horn will sound, indicating the left front TPM sensor is programmed (if this takes more than 15 seconds, pull magnet back and try again, it will give you three tries. Then you must start over) 9) When the horn sounds, proceed to program the next TPM sensor in the following order as directed by the IPC messages: -Learn R Front Tire -Learn R Rear Tire -Learn L Rear Tire Programming can be canceled by turning ignition off, waiting 2 minutes with no sensors being learned, finishing all 4 wheels or through the DIC. If the programming is canceled with less than 4 sensors learned, it will only accept the codes programmed up to that point.

 

If you have metal stems you could have sensors.
Try the training process above( you don't need the special tool, I use an old speaker magnet), if it works you have sensors.
Make sure and try them all, you may have a dead battery or two.

 

I got that list too, but it gave me a lk/unlk key message?? Horn never honked, how strong a magnet is needed? I did #1 thru #7 alright, but#8 never happened. That's when I got the message, any thoughts?

Poolboy, this caveman is stumped.

 

So if you got to the point where it said Learn FL? The magnet I use is about the same diameter as a hockey puck, but only 1/2 as thick as a puck. I lay it onto the valve stem and within a few seconds I get the horn beep

Just cause I am curious, do you have run flats?

 

Yup, they're runflats. They all worked fine until today, now the one is acting up. I guess that my magnet probably isn't right then, its an old u shaped thing and can only get one end on the stem at a time.

PS yes I got to the FL message.

 

lay the magnet alongside the stem - but you may be right. The Learn proceedure only forces the comm link to be reset - if the sensor is not reading the right proessure, I am not sure the relearn wil help - the sensor may need replacing