Toyota TRD 2013 Tire Warning Light stay ON

For you. I would lower all your tire pressure to about 10 psi lower than what you normally drive them at. Then press and hold the set button for 10 seconds so your thresholds at set at 80 percent below that and the solid lamp will be programmed to only come on at 75 percent lower than the lowest or if a sensor is failed and not reporting a value. Then pump them back up. This will give you a wider margin to allow for cold temps. By doing this, You are basically tricking it to be like 60 percent instead of 80 by doing this. You don’t need new sensors yet. It’s just that one of more of your tires, when it’s cold outside, is dipping below whatever 80 percent threshold you had stored when the button was last pushed

 

This is my problem too. I just ignore it

 

There's no problem with the pressure. The blinking then steady light indicates a bad battery.

 

Hi Im not sure where you got that information but the TPMS module does not have any logic in it whatsoever to drive the lamp (flashing or steady) based on the battery voltage level

The lamp logic is purely based on received pressure data coming from the sensor and comparing it against the thresholds

If the batery is dead, then the sensor wont even put out so there is no need to monitor battery level in the design logic.

Not sure who told you this but i assure you that battery voltage is not part of logic, pressure signal present and compared against threshold values is


maybe your saying the same thing for your senario but just clarifying that yes a bad battery will cause the sensor not to report and thus cause the flashing then steady as you said, but im just clarifying how that happens, its not based on battery levels in the logic


but if your system is working fine when it gets warm and the tire pressures come back up then its not a bad sensor, nor a bad battery, its the threshold is set at a marginal point and needs to be set differently

 

Well the pressure didn't drop and I check it often in the winter months. My independent Toyota Tech told my it's the system unable to read the sensor due to weak battery. They scanned each wheel and found the culprit.

 

I think I’ll try this

 

no worries, just trying to help you, your wallet is not my interest, it is theirs though

 

My shop treats me very well. Appreciate your input.

 

Yes it does. The light flashes when the module has lost communication with one of the sensors. A battery going dead in a sensor will make it lose communication. It will also set a trouble code to identify which sensor is dead

 

FYI - Directly from the manual. It was explained to me that this dead/weak battery is the malfunction and thus the pressure can't be determined.

Your vehicle has also been equipped with a TPMS (tire pressure warning
system) malfunction indicator to indicate when the system is not operat-
ing properly. The TPMS (tire pressure warning system) malfunction indi-
cator is combined with the low tire pressure telltale (tire pressure
warning light). When the system detects a malfunction, the telltale will
flash for approximately one minute and then remain continuously illumi-
nated. This sequence will continue upon subsequent vehicle start-ups as
long as the malfunction exists. When the malfunction indicator is illuminated, the system may not be able to
detect or signal low tire pressure as intended.

TPMS (tire pressure warning system) malfunctions may occur for a vari-
ety of reasons, including the installation of replacement or alternate tires
or wheels on the vehicle that prevent the TPMS (tire pressure warning
system) from functioning properly. Always check the TPMS (tire pres-
sure warning system) malfunction telltale after replacing one or more
tires or wheels on your vehicle to ensure that the replacement or alter-
nate tires and wheels allow the TPMS (tire pressure warning system) to
continue to function properly.

 

Im pretty sure i said exactly that too .... but thanks

 

I guess my point of all this is to help people be aware of what the SET button is doing because as shown by what you posted, Toyota fails to explain how it works

i had to create my page and watch how the values were set when i pushed the button to be able to share all of this 80 percent/75 percent info to you all

my contribution here was merely to show info that has never been previously shown or discussed. I haven’t seen anyone else ever find a way to look at the values that are set in the TPMS module when the button is pushed.

I contribute when it’s something that others have never contributed. The rest of the info here is commonly known

for me. I now enjoy knowing what pressure thresholds are written to my module so I know exactly when to expect the light coming on and that I can trust it will caution illuminate to me at a known by me value

 

Also. I should clarify that with the 80/75 percent values. It is rare that one might get into a situation where they fall between 80 and 75. If in that window. It constantly flashes and doesn’t go solid If it goes below 75 or if you turn on the vehicle and a sensor is not reporting or if a sensor is already below the 75 (usually because its battery is dead and not reporting, You will still see it flash first for a minute then go solid. this is also very difficult to test if you can’t watch the values because the sensors don’t report constantly. They report only periodically so when running a test. You might think that the flashing only part might not be working because you didn’t pause long enough at a pressure between 80 and 75 to wait for the next periodic sensor signal to come in You might just go below 75 if you aren’t patient or can’t see where you are in relation to the values stored if you can’t see them either

again. All of this is new info never before posted by anyone. Take it or leave it but I’ve done very detailed reverse engineering and have a sensor programmer tool too that helped me interrogate each sensor and force it to report

 

Fantastic info!