tire sensor light

[scott2008]

Is there a way to reset the light on the dashboard? It is illuminated, all the tires have correct pressure.
Thanks(boom06)

 

[ceric]

It should reset itself if all is fine.
(driving for 15 mins above 15mph... The procedure is in the Owner's Manual).
If the light persists, something is wrong. Probably one of the sensors in the wheel is bad.

 

[Rawyzf]

It should reset itself if all is fine.
(driving for 15 mins above 15mph... The procedure is in the Owner's Manual).
If the light persists, something is wrong. Probably one of the sensors in the wheel is bad.

One of the sensors has probably gone bad.....might have to get a replacement. If it isn't under warranty, don't buy it from the dealership unless you can get it for under $40 (unless you don't care about the $ and hassel) . You can get a whole set of 4 off ebay for around $100 shipped....so you should be able to find one for $25 or so.

 

[scott2008]

One of the sensors has probably gone bad.....might have to get a replacement. If it isn't under warranty, don't buy it from the dealership unless you can get it for under $40 (unless you don't care about the $ and hassel) . You can get a whole set of 4 off ebay for around $100 shipped....so you should be able to find one for $25 or so.

Is there a way to test to see which one is bad?

 

[ceric]

Very good question, Scott.

However, there is no easy way known to me.
At dealership, they can use a computer (laptop or handheld) to
read the codes (or data logs) to find the wheel in question, WU_x_P (x =1,2,3,4).
Then, they have to identify which wheel is WU_x_P (LF,LR,RF,RR?).
The way they do it is to pump the tire at four diff PSI values, and check the reading on computer.

CX9 uses a lower-end TPMS that cannot identify which wheel is which.
Some high-end vehicles can. The ECU receive four PSI values for four IDs.
It cannot pin point which corner is in trouble. It only knows one of the four is.

This might be too much for DIY, unless other people have better way.

 

[SeCX-9]

Very good question, Scott.

However, there is no easy way known to me.
At dealership, they can use a computer (laptop or handheld) to
read the codes (or data logs) to find the wheel in question, WU_x_P (x =1,2,3,4).
Then, they have to identify which wheel is WU_x_P (LF,LR,RF,RR?).
The way they do it is to pump the tire at four diff PSI values, and check the reading on computer.

CX9 uses a lower-end TPMS that cannot identify which wheel is which.
Some high-end vehicles can. The ECU receive four PSI values for four IDs.
It cannot pin point which corner is in trouble. It only knows one of the four is.

This might be too much for DIY, unless other people have better way.

I had been thinking about solving that question myself since earlier....

Does the spare have a sensor? I'm guessing not as it would always be registered by the car.. I was thinking that you could swap in the spare.

How about buying a single TPMS online and putting it on the spare, then swapping in the spare one by one?

These all look like reset and activation tools, essentially what you need is a sensor tool to read if there IS a signal.
http://www.tpms-tool.com