Apparatus for controlling grip heater

A grip heater control apparatus comprising:

• switching means for selectively energizing a grip heater in a steering handle with a battery;
• average corrected battery voltage calculating means for averaging corrected battery voltages, each produced by adding a voltage drop caused by a wire connected between said grip heater and said battery to the battery voltage which is detected each time the battery voltage is detected, to determine an average corrected battery voltage;
• and
• energization/de-energization control means for controlling said switching circuit to inhibit said grip heater from being energized for a period of time until the average corrected battery voltage next reaches an upper limit setting threshold that is equal to the sum of a lower limit setting threshold, at which said grip heater is inhibited from being energized, and a predetermined voltage, from below the lower limit setting threshold, and controlling said switching circuit to allow said grip heater to be energized for a period of time after the average corrected battery voltage has reached the upper limit setting threshold until the average corrected battery voltage next reaches the lower limit setting threshold.