A method comprising: determining temperatures of plural components onboard a vehicle at different moving speeds of the vehicle using temperature sensors (118, 120); and comparing the temperatures of the components with each other using a controller; wherein the method comprises a step of identifying at least one of the components as damaged using the controller responsive to the temperatures of the at least one of the components increasing between two or more of the different moving speeds while one or more other components of the components do not increase or increase by a smaller difference relative to the at least one of the components between the two or more of the different moving speeds, characterized in that the temperatures of the components are determined at a first moving speed and a faster, second moving speed of the moving speeds of the vehicle, wherein the temperatures are compared with each other by determining whether the components have the temperatures that increase from the first moving speed to the second moving speed and whether one or more other components of the components have the temperatures that do not increase from the first moving speed to the second moving speed, and the components having the temperatures that increase from the first moving speed to the second moving speed are identified as damaged while the one or more other components having the temperatures that do not increase from the first moving speed to the second moving speed are identified as not damaged, or the temperatures of the components are determined at a first moving speed and a slower, second moving speed of the moving speeds of the vehicle, wherein the temperatures are compared with each other by determining whether the components having the temperatures that decrease from the first moving speed to the second moving speed and whether one or more other components of the components having the temperatures that do not decrease from the first moving speed to the second moving speed, and the components having the temperatures that do not decrease from the first moving speed to the second moving speed are identified as damaged while the one or more other components having the temperatures that decrease from the first moving speed to the second moving speed are identified as not damaged. determining temperatures of plural components onboard a vehicle at different moving speeds of the vehicle using temperature sensors (118, 120); and comparing the temperatures of the components with each other using a controller; wherein the method comprises a step of identifying at least one of the components as damaged using the controller responsive to the temperatures of the at least one of the components increasing between two or more of the different moving speeds while one or more other components of the components do not increase or increase by a smaller difference relative to the at least one of the components between the two or more of the different moving speeds, characterized in that the temperatures of the components are determined at a first moving speed and a faster, second moving speed of the moving speeds of the vehicle, wherein the temperatures are compared with each other by determining whether the components have the temperatures that increase from the first moving speed to the second moving speed and whether one or more other components of the components have the temperatures that do not increase from the first moving speed to the second moving speed, and the components having the temperatures that increase from the first moving speed to the second moving speed are identified as damaged while the one or more other components having the temperatures that do not increase from the first moving speed to the second moving speed are identified as not damaged, or the temperatures of the components are determined at a first moving speed and a slower, second moving speed of the moving speeds of the vehicle, wherein the temperatures are compared with each other by determining whether the components having the temperatures that decrease from the first moving speed to the second moving speed and whether one or more other components of the components having the temperatures that do not decrease from the first moving speed to the second moving speed, and the components having the temperatures that do not decrease from the first moving speed to the second moving speed are identified as damaged while the one or more other components having the temperatures that decrease from the first moving speed to the second moving speed are identified as not damaged.