A power source control method of a car control unit in which control takes place
according to the control unit temperature or the control of a semiconductor device
in the control unit.
The temperature of a throttle device is detected using a thermistor and is compared
with the reference temperature. Depending on the comparison result, a relay for
controlling the power supply to the throttle device is controlled.
When the temperature of the throttle control unit rises higher than the reference
temperature, the main power source of the throttle device 1 is interrupted.
