boxed

Recently had a nail in one of my tire, tried to plug it but it won't work so I'm ordering another tire from tirerack. Main thing is I took the spare out and installed it but the light is still on? Does it stay on even if theres no spare in the back? Or do I have to bring it to the dealer to have them reset?

DallasGX

once u put the original rim back, the light will go off. same thing happened to me. not to worry

The G Man

The light will stay on as long as it doesnt see all 5 tires at proper pressure.

beevo

It did happened to my GX470. all 5 tired have to be at proper pressure or the light will lid

mann777

This is how the GX TPIS works . Each wheel (including the spare tire on certain vehicles) has a tire pressure warning valve/sensor integrated into the air valve with a unique ID number that measures the tire pressure and tire temperature and then transmits the information to the antenna/receiver mounted inside the vehicle through a radio wave signal. This includes the 5th tire ( spare tire as well. The ECU of the vehicle is programmed and vallues are inputed of 5 tires with the labelled PSI during the delivery stage( mentioned on the door label) . You can increase or decrease these values thru the TIS ( only via the dealer ) But the tyre has to be installed ( spare tire). For if any reason the tire is removed or the sensor is removed from the wheel, there is a grommet there, which has to checked periodically . Also this sensor has a Lithium battery which needs to be replaced once in 5-8 years( average life span).
Normally this is how a warning is generated The ECU takes each tire pressure, tire temperature, and unique tire pressure warning valve/sensor ID information from the antenna/receiver and compares it to the specified
value, which was registered during PDS. If the information received does NOT match the specified value registered in the ECU, it will transmit a signal to illuminate the Tire Pressure Warning System Indicator Light located on the combination meter.
cheers