Abstract: A vehicle includes a low-voltage battery electrically coupled to a powertrain, and a computer programmed to put the vehicle in a minimal risk condition in response to a state of charge of the low-voltage battery falling below a threshold. The vehicle may further include a DC/DC converter electrically coupled to the powertrain and to the low-voltage battery, and a high-voltage battery electrically coupled to the powertrain.

Abstract: Methods and systems are provided for detecting an overspeed shutdown condition of an internal combustion engine. The pressure within an air-intake manifold of the engine is measured, and that pressure is compared to a predetermined pressure, which represents the pressure within the air-intake manifold when an overspeed-shutdown mechanism has not been activated. Activation of the overspeed-shutdown mechanism is indicated when comparing the measured pressure value to the predetermined value results in the measured value being less than the predetermined value.

Abstract: Methods and systems are provided for detecting an overspeed shutdown condition of an internal combustion engine. The pressure within an air-intake manifold of the engine is measured, and that pressure is compared to a predetermined pressure, which represents the pressure within the air-intake manifold when an overspeed-shutdown mechanism has not been activated. Activation of the overspeed-shutdown mechanism is indicated when comparing the measured pressure value to the predetermined value results in the measured value being less than the predetermined value.

Abstract: A transmission shift position sensor that is adapted to provide an indication of the position of a transmission shift lever. The transmission shift position sensor includes a rotary position sensor and a rooster comb formed as an assembly. The direct coupling of the sensor to the rooster comb provides a positive indication of the automatic transmission shift sensor without the need for compensating for tolerances in mechanical linkages.