Fault diagnosis of electronic control unit (ECU)

A system for fault diagnosis of an electronic control unit (ECU), the system comprising:

• a memory having processor-readable instructions stored therein;
• and
• one or more processors configured to access the memory and execute the processor-readable instructions, which, when executed by the one or more processors configures the one or more processors to perform a method, the method comprising:
• receiving a measured electrical current consumption of the ECU from an electrical current sensor connected to a positive power supply pin of the ECU;
• detecting a status of the ECU based on the measured electrical current consumption of the ECU, comprising:
• detecting a normal status responsive to the measured electrical current consumption of the ECU being in a normal electrical current range;
• detecting a first defect in the ECU responsive to the measured electrical current consumption of the ECU being in a first electrical current range;
• and
• detecting a second defect in the ECU responsive to the measured electrical current consumption of the ECU being in a second electrical current range;
• and
• sending a warning signal associated with the detected status of the ECU responsive to a respective engine fuel injection system to the ECU being at a not-running state, comprising:
• receiving an output voltage of the ECU from at least one of a stepper motor, a throttle motor, and combinations thereof;
• receiving an output voltage of a crank shaft sensor;
• comparing the output voltage of the ECU and the output voltage of the crank shaft sensor with a threshold voltage;
• and
• switching on an alarm light associated with the detected status of the ECU responsive to the output voltage of the ECU and the output voltage of the crank shaft sensor being less than the threshold voltage.

A method for fault diagnosis in an electronic control unit (ECU) of an engine fuel injection system, comprising:

• keeping the ECU and the engine fuel injection system at a set of pre-defined conditions, comprising:
• switching the ECU on by switching the engine fuel injection system on;
• and
• keeping the engine fuel injection system at a not-running state;
• measuring an electrical current consumption of the ECU by measuring an electrical current at a positive power supply pin of the ECU;
• and
• detecting a status of the ECU based on the measured electrical current consumption, comprising:
• detecting a normal status responsive to the measured electrical current consumption being in a normal electrical current range;
• detecting a first defect in the ECU responsive to the measured electrical current consumption being in a first electrical current range;
• and
• detecting a second defect in the ECU responsive to the measured electrical current consumption being in a second electrical current range.