Abstract: The failure diagnosis apparatus whether or not a failure exists in a fuel-evaporation-gas purging system that a negative pressure in an intake system of an internal combustion engine is introduced into an accumulator and pressure accumulation is performed in a time period from a time when a driver turns off an ignition key to a time when the internal combustion engine stops its rotation, that the accumulated negative pressure is introduced into a fuel-evaporation-gas path before the internal combustion engine stops the rotation or after the internal combustion engine has stopped the rotation, and that in a time from a time when after the internal combustion engine has stopped the rotation, the driver again turns on the ignition key to a time when the internal combustion engine starts, it is determined whether or not a pressure change in the fuel-evaporation-gas path exists.

Abstract: A vehicle power supply system includes a power monitor device that detects supply power from a battery and a generator to a home electrical appliance and a control unit that performs a supply power excess determination and a supply power variance determination using a detection value of the power monitor device when a driving of a vehicle is stopped to control a rotational speed of an engine according to determination results.

Abstract: A vehicle heater control apparatus variably controls electric power to be supplied to a heater with an inexpensive configuration and simple control. The vehicle heater control apparatus is provided in a vehicle including an engine control system, the engine control system including: an intake air temperature sensor for detecting an intake air temperature; and a speed sensor for detecting a traveling state of the vehicle, the engine control system using the intake air temperature and the traveling state to control drive of the engine, and the vehicle heater control apparatus includes a heater control portion for variably controlling electric power to be supplied to a warmer provided to a heated part of the vehicle based on the intake air temperature and the traveling state.

Abstract: A vehicle power supply system includes a power monitor device that detects supply power from a battery and a generator to a home electrical appliance and a control unit that performs a supply power excess determination and a supply power variance determination using a detection value of the power monitor device when a driving of a vehicle is stopped to control a rotational speed of an engine according to determination results.

Abstract: A vehicle heater control apparatus variably contras electric power to be supplied to a heater with an inexpensive configuration and simple control. The vehicle heater control apparatus is provided in a vehicle including an engine control system, the engine control system including: an intake air temperature sensor for detecting an intake air temperature; and a speed sensor for detecting a traveling state of the vehicle, the engine control system using the intake air temperature and the traveling state to control drive of the engine, and the vehicle heater control apparatus includes a heater control portion for variably controlling electric power to be supplied to a warmer provided to a heated part of the vehicle based on the intake air temperature and the traveling state.