The EPB is an electronic parking brake.
The EPB is different from existing parking systems which
operated with the brake pedal or the lever type. The EPB system sends
the signal to the ECU when a driver operates the EPB switch. The ECU
operates the EPB actuator composed with motor gears. The braking power
is caused by occurs when the motor pulls the cable connected the brake
system.
The EPB ECU is one of the parts of EPB system. It perceives
the signal of the various sensor of system, executes a self diagnosis,
controls EPB system with the logic.
Main function
| 1. |
Static Braking Mode
The operation and the cancellation at the stop condition of the vehicle
| (1) |
The operation condition : Pull the EPB switch irrespective of the ignition switch ON & the brake pedal pressed condition.
| A. |
The Vehicle speed <= 6kph |
|
| (2) |
The cancellation condition : Push the EPB switch at the ignition switch on & the brake pedal pressed condition. |
|
| 2. |
Dynamic Braking Function
DBF (Dynamic Braking Function): The DBF is the braking
function at the driving condition, it can operate the EPB system and
cancel it at the vehicle driving condition. This function will be used
while foreign materials get in between the brake pedal or the brake
hydraulic line can not be operated.
| (1) |
The operation condition
It operated only when the vehicle speed is faster than 6kph and the EPB switch is Pulled |
| (2) |
The cancellation condition: It canceled when the Pulling of the EPB switch is stopped. |
| (3) |
Principle of Operation
| A. |
VDC system is normal condition: EPB requests applying pressure of brake to VDC system. |
| B. |
VDC system is abnormal condition: EPB operates the parking brake for reduction of speed. |
|
| (4) |
Peculiarity
Anti-lock is operated when occurring wheel lock. Parking lamp on the cluster Is lighted up in the case of emergency braking. |
|
| 3. |
Drive Away Release
Convenient for drivers, EPB is automatically released when driver shift from P or N another (R/D/S) during braking.
| A. |
EPB is automatically released when driver starting from D/R/S with push the acceleration pedal. |
| A. |
Driver door closing and seat belts tightening should be at the same time . |
| B. |
In 'D', must be closed hood. |
| C. |
In 'R', must be closed trunk. |
|
| 4. |
AVH(Automatic Vehicle Hold)
AVH supports to keep a stop condition of the vehicle by hydraulic brake at a stop.
| (1) |
Condition for operation
| D. |
Fastening driver seat belt |
| E. |
A gear shift is not P-range |
| F. |
Perfect stop condition with hitting the brake pedal. |
|
| (2) |
AVH function holds stop condition of the vehicle for maximum 10 minutes.
VDC valve keeps stop condition because of intercept the oil passage with pressure occurred from brake pedal. |
| (3) |
An accumulated time of AVH operation : Max. 30min |
| (4) |
Automatic release function
AVH mode is released when driver attempts starting a vehicle by pedaling an acceleration pedal at the D/ S/ R range. |
| (5) |
Automatically convert AVH to EPB
AVH will convert EPB operation automatically if any one satisfy conditions below.
[Normal conversion case]
| A. |
In the case of driver door open & Driver seat belt release at the same time |
| B. |
In the case of opening the hood while the shift lever is D or S. |
| C. |
In the case of opening the trunk while the shift lever is R |
| D. |
In the case of over 5 minutes of AVH operation time |
| E. |
Stop at a slope of twenty five degrees |
[Abnormal conversion case]
| A. |
When sensing detailed motion of the vehicle. |
| B. |
When sensing the fault of VDC hydraulic system. |
|
|
| 5. |
Bedding Mode
| A. |
Bedding mode is brake lining taming process that continuous
operation of EPB while driving. must be performed bedding for optimize
the performance of the EPB 's the early stage of function. |
| (2) |
Operate the brake pedal twice within 10 second and keep pushing at the third times. |
| (3) |
Push the EPB switch 4 times continuously, release 3 times continuously within 10 second . |
| (4) |
Operate the EPB switch when driving speed 30~35km/h (EPB is Automatically released when over 50 km/h at the bedding mode) |
|
Warning Lamp
| 1. |
EPB warning lamp
EPB warning lamp indicates the EPB cut and malfunction.
EPB warning lamp comes ON below cases.
| (1) |
EPB warning lamp comes on for 3 seconds after the ignition
switch is ON. If EPB system is working properly, EPB warning lamp goes
OFF |
| (2) |
If EPB system is not working properly, EPB warning lamp comes ON |
| (3) |
Under diagnosis mode, EPB warning lamp comes ON |
|
| 2. |
AUTO HOLD lamp / AUTO HOLD function lamp
| (1) |
AUTO HOLD switch ON
| A. |
Brake system operates automatically when vehicle speed is
“0”, in the case of parking or waiting at a red light, during
braking (AUTO HOLD function lamp : Green) |
| B. |
Brake system is released automatically when step on the accelerator pedal. (AITO HOLD lamp : White) |
|
| (2) |
AUTO HOLD switch OFF : AUTO HOLD function does not operate. |
|
Removal
Parking Brake Shoe
1.
Raise the vehicle, and make sure it is securely supported.
2.
Remove the rear tire and wheel.
3.
Remove the brake caliper and Rear disc brake. (Refer to Bra ...
Components
1. EPB2. Bracket No.13. Bracket No.24. EPB Extension wiring harness5. Parking brake cable
...
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Hyundai Equus: Electric Parking Brake (EPB) Description and Operation
Second generation VI (2009–2024) / Hyundai Equus VI 2009-2024 Service Manual / Brake System / Parking Brake System / Electric Parking Brake (EPB) Description and Operation
Repair procedures
Electric Parking Brake (EPB) Components and Components Location