The EPB system is the shorten word of Electric Parking Brake system. This system is the parking brake device which is used instead of the conventional hand-break system. When a driver presses the EPB button, the button signal is delivered to the EPB ECU and then the EPB actuator which consists of a motor and a gears is activated. At this time, while the motor in the EPB actuator rotates, the motor pulls the EPB cable connected to the rear wheels. Among components of the EPB system, the motor is installed inside of EPB ASS'Y. When the motor gets the EPB ECU's order, it is operated and gets parking cables to be moved through gear box.
The EPB ECU monitors the temperature of the EPB motor and if it is detected as overheated or overloaded, this DTC is set.
Item
Detecting Condition
Possible Cause
DTC Strategy
Monitoring the temperature of EPB motor
Short in the motor circuit
Motor stuck
Overused motor
Faulty motor
(inside EPB ASS'Y )
Threshold value
When it is detected that the EPB motor is overheated or overloaded
Fail-Safe
The EPB functions are inhibited.