Get the computer check if you cant find any trouble code there to start with then open the dash switch from where you start the rear AC and check for continuity.
first inflate all tyres to 32 PSI and then under the steering wheel thee is reset knob that will restart the TPMS and set that calibration for future reference and will alarm if it goes lower.
i have a Gx 2005 model and my problem is that one of the lights above the temperature gauge came on in the top left hand corner where the H and C are i don't know what is this light for.
i think it is one of the indicator lights as i know it's not the check engine symbol or the oil light.
this symbol looks like a little house. hope to get a reply
thanks