Fail-safe relay (built into the EPS control unit)

When the system is operating normally, the CPU turns the fail-safe relay on, and the power is provided to the EPS motor. When the CPU detects a failure in the system that requires it to shut down the system, the CPU turns the fail-safe relay off at the same time it turns the power relay off. This relay is a fail-safe in the event the power relay is faulty and does not turn off.