Mining dump truck and method for diagnosing operation of mining dump truck

A mining dump truck (100) provided with a device (40) for controlling the vehicle body (10) during travel, the mining dump truck (100) being provided with a log-recording device (60) for recording the functioning of the vehicle body control device (40). Subsequently extracting and analyzing data relating to the functional state of the vehicle body control device (40) recorded in the log-recording device (60) thereby makes it possible to accurately establish information such as the actual work time and specific details of control by the vehicle body control device (40), which can be useful for, e.g., modifying the vehicle body control device (40) in a variety of ways, improving the condition of the on-site road surface, and perfecting the driving characteristics of the operator.