We have passed a number of these reports on to Toyota for their response and last week we received this comment from a Toyota spokesman: "Toyota acknowledges owners comments regarding the ATM light illuminating when towing heavy loads. We are currently investigating the issue. However, we wish to advise, the ATM light only indicates high oil temperature. Owners who experience this condition should follow the 'Owners Manual' instruction, as well as ensuring airflow to the radiator is not blocked."