A vehicle control apparatus includes: an oil temperature sensor in the oil; a motor temperature sensor at a position higher than that of an oil level of the oil; a common temperature sensor disposed at a position in the oil when a driving state of the vehicle is a first driving state and disposed at a position higher than that of the oil level when the driving state of the vehicle is a second driving state; a state determination unit configured to determine whether the driving state of the vehicle is either one of the first and second driving states, on the basis of at least a revolution number of the motor; and a malfunction diagnosis unit configured to perform malfunction diagnosis on the basis of output from the common temperature sensor in the first driving state and output from the common temperature sensor in the second driving state.

A shutter device having a frame (2), a plurality of flaps (30, 31, 32, 33, 34, 35, 36, 37, 38, 39) pivotably coupled to said frame (2) and configured to pivot between a closed position and an open position, an actuator (5), a transmission part (4) configured to transmit the movement of the actuator (5) to said flaps (30, 31, 32, 33, 34, 35, 36, 37, 38, 39), and a diagnostic system which allows the absence of at least one of the flaps (30, 31, 32, 33, 34, 35, 36, 37, 38, 39) to be detected during an evaluation process. The diagnostic system also has transmission elements (60, 61, 62, 63, 64, 65, 66, 67, 68, 69) associated with the flaps (30, 31, 32, 33, 34, 35, 36, 37, 38, 39) which cooperate with one another, causing a concatenated force transmission.

Methods and systems are provided for conducting a diagnostic on a fuel tank isolation valve that regulates a flow of fuel vapors from a fuel tank to an evaporative emissions system. In one example, a method comprises determining whether the fuel tank isolation valve is stuck in a first open position or a second open position based on a time duration between commanding open a canister purge valve to direct fuel vapors to an engine, and an exhaust gas sensor indicating a rich air-fuel ratio. In this way, appropriate mitigating action may be taken in response to the fuel tank isolation valve being stuck in either the first open position or the second open position.

A pressure sensor malfunction determination device for a fuel tank includes a fuel tank that stores fuel, a canister that absorbs an evaporated fuel gas and includes a drain port opened to atmosphere, an evaporation path communicating with the canister and fuel tank, a purge gas path communicating with an engine inlet system and the canister, a pressure sensor that detects a pressure, a solenoid valve that opens/closes the evaporation path, and a control unit that controls an opening/closing state of the solenoid valve. When the fuel tank pressure is one of predetermined positive and negative pressure states, the control unit performs valve-opening control on the solenoid valve. The control unit includes a pressure sensor malfunction determination unit that, when an output value of the pressure sensor detected under an atmospheric pressure condition corresponds to a pressure other than the atmospheric pressure, determines that the pressure sensor is malfunctioning.

An evaporated fuel treatment device includes a fuel tank that stores fuel for an internal combustion engine, a canister that adsorbs evaporated fuel generated in the fuel tank, a pump that pressurizes and depressurizes a diagnostic target system including the fuel tank, a pressure detection unit that detects pressure in the diagnostic target system, a fuel state detection unit that detects a state of the fuel in the fuel tank, a leakage diagnosis unit that diagnoses leakages of evaporated fuel from the diagnostic target system, the diagnostic target system based on a change in a detection value detected by the pressure detection unit when the pump pressurizes or depressurizes the diagnostic target system, and a diagnosis determination unit that determines whether the leakage diagnosis unit performs the diagnosis based on a change in a state detection value detected by the fuel state detection unit.

Methods and systems are provided for conducting a diagnostic on a fuel tank isolation valve that regulates a flow of fuel vapors from a fuel tank to an evaporative emissions system. In one example, a method comprises determining whether the fuel tank isolation valve is stuck in a first open position or a second open position based on a time duration between commanding open a canister purge valve to direct fuel vapors to an engine, and an exhaust gas sensor indicating a rich air-fuel ratio. In this way, appropriate mitigating action may be taken in response to the fuel tank isolation valve being stuck in either the first open position or the second open position.

Method and apparatus are disclosed for monitoring a vehicle power supply system having a primary and a secondary power source. An example vehicle includes a primary power source, a secondary power source comprising a low voltage battery, and a processor. The processor is configured for reducing an output of the primary power source, determining an operational characteristic of the low voltage battery while the output of the primary power source is reduced, and providing an alert based on the operational characteristic.

A method for reactivation of an electrical system of a vehicle comprising a first electrical system operating at a first lower voltage and a second electrical system operating at a second higher voltage, comprising: detecting a fault or a crash situation in the second electrical system; disconnecting a power source of the second electrical system; determining the fault of the second electrical system is no longer present or that the crash situation is resolved; reconnecting the power source to the second electrical system and increasing the voltage of the second electrical system from zero to an intermediate voltage lower than the second voltage; and if a detected current in the second electrical system is higher than a current threshold value; or if a detected voltage of the first electrical system is higher than a voltage threshold value; reducing the voltage of the second electrical system to zero.

A pressure sensor malfunction determination device for a fuel tank includes a fuel tank that stores fuel, a canister that absorbs an evaporated fuel gas and includes a drain port opened to atmosphere, an evaporation path communicating with the canister and fuel tank, a purge gas path communicating with an engine inlet system and the canister, a pressure sensor that detects a pressure, a solenoid valve that opens/closes the evaporation path, and a control unit that controls an opening/closing state of the solenoid valve. When the fuel tank pressure is one of predetermined positive and negative pressure states, the control unit performs valve-opening control on the solenoid valve. The control unit includes a pressure sensor malfunction determination unit that, when an output value of the pressure sensor detected under an atmospheric pressure condition corresponds to a pressure other than the atmospheric pressure, determines that the pressure sensor is malfunctioning.

The present disclosure is directed to an active transfer case equipped with a multi-plate clutch assembly, a clutch actuation mechanism configured to selectively engage the clutch assembly, a power-operated clutch actuator configured to control actuation of the clutch actuation mechanism, a power-operated actuator brake associated with the power-operated clutch actuator, and a control system configured to control actuation of the clutch actuator and the actuator brake while employing a preemptive check of the functionality of the actuator brake.