Turning control device

A turning control device that controls a turning device, the turning device turning a turning wheel of a vehicle, the turning control device comprising a precursor detection circuit configured to detect a precursor of an abnormality by which a smooth operation of the turning device is impaired, wherein:

• the precursor detection circuit is configured to start measurement of a total running time of the vehicle when the precursor is detected, and is configured to execute a process of reporting the precursor, based on the measured total running time;
• and
• the precursor detection circuit is configured to perform the measurement of the total running time regardless of whether the precursor is detected again, when a vehicle electric power source is switched off and then is switched on again after the precursor is detected once, wherein:
• the precursor detection circuit is configured to store the total running time when the vehicle electric power source is switched off;
• the precursor detection circuit is configured to read the total running time stored at a timing when the vehicle electric power source is switched off, when the vehicle electric power source is switched on again, and is configured to restart the measurement of the total running time, using the read total running time as an initial value, and
• the precursor detection circuit is configured to increase the initial value depending on a period during which the vehicle electric power source is in an off-state.