Techniques for reducing vehicle energy consumption with dysfunctional hardwire wake-ups

A hardwire wake-up line monitoring and power saving method for a vehicle, the method comprising:

• providing, by a secondary controller of the vehicle, a wake-up signal to a supervisory controller of the vehicle via a hardwire wake-up line connected therebetween, wherein the hardwire wake-up line is a power supply line and not a communication line;
• waking up, by the supervisory controller, in response to receiving the wake-up signal via the hardwire wake-up line;
• executing, by the supervisory controller, a set of functions for the secondary controller associated with the wake-up signal;
• detecting, by the supervisory controller, a malfunction of the hardwire wake-up line when the set of functions are completed or expired and the hardwire wake-up line is still providing the wake-up signal, wherein the malfunction of the hardwire wake-up line is caused by a short of the hardwire wake-up line;
• and
• in response to detecting the malfunction of the hardwire wake-up line, transitioning, by the supervisory controller, to a low power mode where outputs of the supervisory controller are temporarily disabled to save power and the supervisory controller continues to monitor for a valid wake-up request.