ELECTRIC PARKING BRAKE SYSTEM SYSTEM DESCRIPTION

SYSTEM DESCRIPTION

The electric parking brake system controls the parking brake cable by electrically loosening and tightening the cable with the actuator.
While the vehicle is stopped (the vehicle speed is 0 km/h (0 mph)), the parking brake locks and the PARK warning light turns on when the electric parking brake switch is pushed, and the parking brake releases and the PARK warning light turns off when the electric parking brake switch is pulled.
While the vehicle is being driven, the lock control only operates while the electric parking brake switch is being pushed. The release control operates immediately after the switch is released.

Tech Tips

When the electric parking brake switch is being pushed, the PARK warning light turns on and buzzer sounds.

for M/T:

Drive away release function:
- The drive away release function detects the intention of the driver to start driving based on the operation of the shift lever, clutch pedal and accelerator pedal, and automatically releases the parking brake.
Ignition switch off automatic apply function (Auto mode):
- When the driver turns the ignition switch off while the vehicle is stationary and auto mode is on, the parking brake is automatically set.
  
  When the parking brake is completely set, the PARK warning light in the combination meter turns on.
  
  Tech Tips
  
  This function allows the parking brake to be applied without the driver having to operate the electric parking brake switch and helps to avoid forgetting to apply the parking brake.
Auto mode setting:

Tech Tips

The initial setting of auto mode upon vehicle delivery is ON.
- If the electric parking brake switch is pulled for 5 seconds, auto mode turns off, and the auto parking brake off indicator light (yellow indicator) in the combination meter turns on.
- If the electric parking brake switch is pushed for 5 seconds, auto mode turns on, and the auto parking brake off indicator light (yellow indicator) in the combination meter turns off.
Tech Tips

As the auto mode setting is stored by the electric parking brake ECU, it is not necessary to select the setting each time the ignition switch is turned to ON.
1. The vehicle is stationary (vehicle speed is less than 3 km/h (1.8 mph)).
2. The ignition switch is ON.

Ignition switch off automatic apply function (Auto mode) inoperative warning function:

If the ignition switch off automatic apply function (Auto mode) is not operating normally, the user is warned using the multi-information display and a buzzer under the following conditions.

Multi-information Display and Buzzer Operation
IG Switch Condition	Parking Brake	Multi-information Display	Driver Side Door	Buzzer
Ignition switch ON (engine start condition) → Ignition switch off	OFF	Parking brake application request displayed	CLOSE	2 consecutive short beeps
Ignition switch ON (engine start condition) → Ignition switch off	OFF	Parking brake application request displayed	OPEN	Intermittent

Text in Illustration
*1	Parking Brake	*2	Multi-information Display
*3	Driver Side Door	*4	Buzzer
*a	ON	*b	OFF
*c	Parking brake application request displayed	*d	Not displayed
*e	OPEN	*f	CLOSE
*g	Ignition switch ON (engine start condition) → Ignition switch off	*h	2 consecutive short beeps
*i	Intermittent	-	-

Electric parking brake switch override.

If the electric parking brake switch is pulled while the ignition switch is being turned off, switch override goes into effect. As a result, the parking brake will not automatically operate even if auto mode is on.

COMPONENTS OPERATION

Components		Function
Parking brake with bracket actuator assembly	Electric parking brake ECU	Controls the electric parking brake system by utilizing several signals.
	Motor	Operates depending on the ECU command so that the parking brake is applied or released.
	Tension sensor	Detects the parking brake cable force.
	Stroke sensor	Detects the stroke of the parking brake cable.
	Parking brake cable	Transfers the tension, which is created by the sliding of the spindle and shaft, to the rear brakes. For the shaft side, the cable is connected via the bearing so that the cable does not rotate together with the shaft.
	Emergency release cable	Rotates the motor directly in case of an electric parking brake switch failure to allow the parking brake to be released manually.
Yaw rate sensor		Detects the inclination of the slope where the vehicle stops.
Electric parking brake switch		Detects lock or release requests from the driver. Allows driver to change auto mode setting.
Brake system warning light (yellow indicator)		Turns on to inform the driver when an electric parking brake ECU failure occurs, or the operation is limited due to factors in other systems.
Multi-information display		Turns on together with the brake system warning light (yellow indicator) to inform the driver when the electric parking brake system cannot be controlled due to a failure. Warns the driver when the ignition switch off automatic apply function (Auto mode) is not operating normally. (for M/T)
PARK warning light		Turns on when the parking brake is applied. Blinks when the electric parking brake is not available from the driver's request.
Auto parking brake off indicator light (yellow indicator) (for M/T)		Turns on when auto mode is turned off.
Brake pedal stroke sensor (Clutch pedal stroke sensor) (for M/T)		Detects the amount of the clutch stroke. Detects whether or not the clutch pedal is depressed.
Park/neutral position switch (for M/T)		Detects if the shift lever is in neutral.
Back-up light switch (for M/T)		Detects if the shift lever is in reverse.
Skid control ECU		Receives the parking brake status information from the electric parking brake ECU and outputs the stop light signal and vehicle wheel speed signal to the electric parking brake ECU.
ECM		Outputs the ECM information to the electric parking brake ECU.
Buzzer (for M/T)		Warns the driver with 2 consecutive short beeps or an intermittent sound when the ignition switch off automatic apply function (Auto mode) is not operating normally.