Abstract: Technical solutions are described for a system and method for determining status of an electronic control unit (ECU) in a dual-ECU system. The method includes: determining, by a first ECU, a pin state of an communications terminal connected to a sensor; powering the sensor by a second ECU; and determining, by the first ECU, a status of the second ECU based on the pin state of the communications terminal. The first ECU may determine the second ECU as being nonresponsive via a communications interface, and the first ECU may determine the status of the second ECU in response to determining the second ECU being nonresponsive via the communications interface. The first ECU may determine the status second ECU as being one of powered-on and non-responsive, powered-on and functioning, or powered-off, based on the pin state of the communications terminal.

Abstract: A motor control diagnostic apparatus is provided. The apparatus includes a control module in communication with a multiple phase electric power steering motor, the control module configured to generate multiple phase duty cycle outputs based on a voltage command generated from a motor torque command and motor position. The apparatus also includes a diagnostic module configured to analyze a reasonableness of the duty cycle outputs based on comparing the duty cycle outputs to expected duty cycle outputs, wherein the expected duty cycle outputs are estimated based on determining the electrical revolution sector of each motor phase.

Abstract: A motor control diagnostic apparatus is provided. The apparatus includes a control module in communication with a multiple phase electric power steering motor, the control module configured to generate multiple phase duty cycle outputs based on a voltage command generated from a motor torque command and motor position. The apparatus also includes a diagnostic module configured to analyze a reasonableness of the duty cycle outputs based on comparing the duty cycle outputs to expected duty cycle outputs, wherein the expected duty cycle outputs are estimated based on determining the electrical revolution sector of each motor phase.