Electric Parking Brake System Description - Control
Manual Operating Function
The electric parking brake can be manually applied and released using the switch. Pulling up on the electric parking brake switch applies the parking brake. Firmly applying the brake pedal and pushing down on the electric parking brake switch release it.
Drive Away Assist Function
- CVT
The electric parking brake is released automatically when the vehicle is driven away from a stop with the driver's seat belt buckled. Problems in the electric parking brake switch circuits do not affect this function.
- M/T
The electric parking brake is released automatically when the vehicle is driven away from a stop with the engine running, the vehicle in gear, the clutch engaged, and the driver's seat belt buckled. When the electric parking brake control unit confirms the appropriate amount of engine torque to move the vehicle forward relative to the incline of the slope, the electric parking brake releases.
Problems in the electric parking brake switch circuits do not affect this function.
External Applying Function
During automatic brake hold or low speed follow control, the electric parking brake operates automatically depending on a request.

Automatic Adjusting Function
Because the parking brake is automatically adjusted whenever applying the parking brake, the parking brake does not require adjustment. Additionally, if the vehicle is driven 1864 miles (3,000 km) without applying the parking brake, the parking brake is automatically applied and released while the vehicle is in the OFF (LOCK) mode, and performs the automatic adjustment in order to compensate for brake pad wear.
Emergency Brake Function
In an emergency situation, such as a failure of the conventional brake system, the electric parking brake system performs the emergency brake function by activating the electric parking brake switch continuously. There are two controls depending on the state of the VSA system.

In cases where the VSA system can perform the pressure adding control:
The electric parking brake system sends the brake control request to the VSA system which applies the emergency brake using the pressure adding control.
In cases where the VSA system can not perform the pressure adding control:
The electric parking brake system controls the electric parking brake actuator so that the wheels do not lock, and applies the emergency brake instead of the VSA system. However, if wheel speed signal is abnormal, the anti-lock control does not perform.
Prohibition of Manually Releasing the Parking Brake in Ignition OFF Mode
In the ignition OFF(LOCK) mode, the system does not allow manual releasing of the electric parking brake.
Ignition OFF Apply Function - Switch Failure (M/T)
If the electric parking brake switch has a fault, the system will automatically apply the parking brake when the vehicle is turned to the OFF(LOCK) mode.
Maintenance Mode
The electric parking brake system has a maintenance mode functional test. This test fully releases the parking brake mechanism so that brake service, such as rear pad replacement, can be done. Maintenance mode can be activated by the HDS.