Toyota FJ Cruiser Forum banner
1 - 14 of 14 Posts

·
Registered
Joined
·
34 Posts
Discussion Starter · #1 ·
I recently had new Schrader 33500 TPMS sensors installed on my 2008 FJ. The original tire shop could never get my FJ to "learn" the new sensors. While I was waiting on them to sort out why they couldn't make them work, I took the FJ to Discount Tire and they managed to get the FJ to learn the new sensors with no problem. However, I still have my TPMS light blink and stay lit. I can go in and clear DTC codes and can see that the computer is registering tire pressures, but within driving about 20 minutes or so, the darned TPMS light starts blinking again. It doesn't seem as though the computer can maintain connection with the sensors although whenever I do a diagnostic test, I can read tire pressures from the computer...not directly from the sensor.

Any clue what may be going on?

Any assistance would be greatly appreciated. I don't want to have to go drop a bucket of money at a dealership to get this issue resolved.
 

·
Registered
Joined
·
7,506 Posts
I'm sorry to hear you are having problems with your TPMS sensors. There are specific sequences for setting up the Sensors in the relearn process. PM coming your way.
As a Forum where technical knowledge is shared, could this 'learning process' be posted here for the benefit of others who may run into the same issue?

Almost all FJ Cruisers have passed or are approaching the point where their OEM TPMS sensor batteries have reached EOL, and new sensors will have to be installed and their IDs 'learned' by the FJ's side of the system.

I'm a long-time DT customer here in California, and I'll go to DT to have the sensors replaced in my '14 FJ when they die, but I'd just like to know exactly what the programming process consiste of.
 

·
Registered
Joined
·
1,768 Posts
I agree with FJTest. I need to get my TPMS replaced (doing all at once- 5 of them- just as well to be good for 8-10 more years -so they live the same life - only want to go in once every 10) now as the batteries have apparently died off in my 2014. How is this is done would be helpful info.
 

·
Supporting Vendor
Tire & Wheel Specialists
Joined
·
2,770 Posts
Thank you for your questions, the most important part of the process is having the correct tool to read and write to the vehicle. Our stores use a tool such as a TECH 400 to read and write to the vehicles computer.

If you have an issue with a TPMS sensor please stop at one of the local Discount Tire/America's Tire stores so they can diagnose the issue.
 

·
Registered
Joined
·
7,506 Posts
I agree with FJTest. I need to get my TPMS replaced (doing all at once- 5 of them- just as well to be good for 8-10 more years -so they live the same life - only want to go in once every 10) now as the batteries have apparently died off in my 2014. How is this is done would be helpful info.
Mike -
How many miles on your '14?
How long ago did the first sensor die, and did they all die in rapid succession?
I've also got a '14, and although all the sensors are still functional, I'd like to know how soon I should expect to have to replace them.
 

·
Admin
Joined
·
14,196 Posts
Blinking and THEN going solid means it has lost communication with one or more sensors..... leaving your spare tire in your garage as you drive away does this, lol..... and a dead sensor also does this.
 

·
Registered
Joined
·
1,323 Posts
Actually, I did this once when washing my FJ. I backed it out without the spare tire hanging on the back. The light never went off and the wheel was over 10 feet away in the garage. How far does the sensor have to be from the FJ to set off the warning? And yeah, mine are now 11 years old and getting past their EOL. The tires are also past their age EOL even though the tread is still good. I've been putting off re-shoeing the beast because I'd like to get better looking wheels than the BLAH silver swiss cheese OEM wheels that came with it. That would be a LOT of cash to swallow in one sitting.
 

·
Registered
Joined
·
1,768 Posts
FJ Test- I know at least one of the tpms are not working -died about 3 mo ago. I haven’t checked them all at Discount Tire yet. With 9 years on the FJ it’s about that time - just as well do all at once. Especially since going to add new rims it’s a good move. 2014 FJ has about 74k miles
 

·
Registered
Joined
·
34 Posts
Discussion Starter · #10 ·
Unfortunately, I still have no idea what is going on with my FJ. I know the tech programmed the sensors correctly since I can go into the TPMS ECU with my scanner and can read the sensor id's and tire pressures with no problem. I can even reset the DTCs and clear the error. When I drive the next day, the TPMS light starts to blink after driving about 20 minutes and stores the CTC C2121 which says it can't communicate with sensor ID1, but when I'm parked, I can pull info from sensor ID1 from the ECU showing it is reading a correct tire pressure. Only thing I can think of is that the TPMS sensor is messed up in some way so that when it starts spinning it stops transmitting. Banging my head on the wall with this one!
 

·
Registered
Joined
·
34 Posts
Discussion Starter · #12 ·
I don't see this being asked, are you positive the spare, being the most obvious, have the correct air pressure.
Yes. I can see all the pressures being reported from the ECU for all 5 tires. All are around 35 - 36 psi. That is the pressure being reported from the computer and confirmed by my hand held gauge. Not sure what happens when is start driving to cause the computer to not communicate with one of the sensors, or at least that appears to be the issue. These are brand new sensors.
 
1 - 14 of 14 Posts
Top