2012 Toyota Highlander Owners Manual - Page 534

5 -2 . St e ps t o t a k e in a n e m e rge nc y I f your ve hicle ove rhe at s The following may indicate that your vehicle is overheating: ● The needle of the engine coolant temperature gauge enters the red zone: The engine may be overheating. ● "Hybrid System Overheat" is shown on the multi-information display: The power control unit may be overheating. Follow the correction procedure as described below. Correction procedures