Hi everyone i'm new on this forum and new to owning a 2007 Lexus IS250 . So with that my problem is i bought my lexus knowing the nav didnt work and that there has been problems with them on other Lexus's. My problem is the nav says program cannot be read contact dealer. And the buttons on the right side of the unit dont work. the touch screen works fine. Then on the dash display in between the speedo and tach there is a display of check system and a red triangle then my low tire press light is on in the bottom right corner. I have checked for the right nav disc and the dealer says i have the right one. I also took the car to the tire shop to have the tpms sensors checked. They could not get them to read or certify. But they did a ecu reset and when they were doing the reset the nav came on the when the reset was done it turned back off. I have taken the nav stereo unit out to see if there was wires unhooked or other possible visual signs of something wrong and did not find anything. I was hoping someone might have some advice if it is something they have fixed before or if i have to get a new unit all together. Thanks For your guys time.
