Fail-safe Relay (Built Into the EPS Control Unit)

When the system is operating normally, the CPU turns the fail-safe relay to on, and the power is provided to the EPS motor. When the CPU detects a failure in the system which has the demand 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.