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Kia Cee'd: Parking Brake System / Electronic Parking Brake (EPB) Description and operation

Kia Cee'd JD Service Manual / Brake System / Parking Brake System / Electronic Parking Brake (EPB) Description and operation

Description
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.
EPB Function
1.
Static Switch Apply
Manual apply of EPB switch in stand still condition.
Clamping force control; When parked on less than 8% slope with engine running, it is applied with Reduced Clamp Force(RCF); Except for RCF condition, it is applied with full clamp force.
2.
Reduced Clamp Force on Flat (RCF)
If EPB is applied on less than 8% slope, it is applied with reduced clamp force.
When switch is pulled for more than 3 sec, it is clamped to full clamp force.
3.
Static (Switch) Release
Releasing EPB manually by switch
To prevent danger situation, it can be released only when ARC is fulfilled.
Additional Release Condition (ARC)
To prevent unintentional release of EPB, there is condition to be met before releasing;
Example: IGN On + [Brake Pedal pressed]
Child Safe (Release Inhibit)
With ignition switched off, EPB cannot be released.
4.
Drive Away Assist (DAA)
The parking brake can be automatically released by slowing depressing the accelerator pedal when all the conditions below are satisfied. (A/T only)
(1)
Start the engine.
(2)
Fasten the driver's seat belt.
(3)
Close the driver's door, engine hood and tailgate.
(4)
Depress the accelerator pedal while the shift lever is in R (Rear), D (Drive) or Sports mode.
The parking brake can be automatically released by slowing depressing the accelerator pedal while removing the foot from the clutch pedal when all the conditions below are satisfied. (M/T only)
(1)
Start the engine.
(2)
Fasten the driver's seat belt.
(3)
Close the driver's door, engine hood and tailgate.
(4)
Depress the clutch pedal with the gear engaged.
5.
Dynamic Parking
When EPB switch is pulled in dynamic condition, dynamic deceleration is generated by EPB actuator.
Clamp force will be controlled to avoid locking of the rear wheels and ensure vehicle stability.
6.
Roll Away Reclamp (RAR)
If vehicle rolls away, EPB gets reapplied.
; Vehicle movement is monitored via wheel speed.
; It can be active until CAN signal is available (3 min)
7.
High Temperature Reclamp (HTR)
After detection of hot brakes, EPB will reapply from closed brake state to compensate for loss of clamp force during cooling of the brakes.
Activation condition: over 350°C
8.
Pad Change Mode
Return the spindle nut fully for pad replacement
; This mode can be entered via hand tool connected to vehicle with OBD2 connector.
; Piston can be pushed in after entering Pad change mode
9.
Dynamic Standstill Detection (DSD)
This is how to operate the parking brake when there is no wheel speed signal because of malfunction. Braking force can be applied while the vehicle is in motion to slowly decelerate. If the EPB switch is continuously pulled, then the parking brake can be engaged with maximum force.
10.
P to X
EPB is automatically released when gear shift lever is moved from P position;
Engine on + Brake pedal condition is necessary.
11.
N to X
EPB is automatically released when gear shift lever is moved from Neutral position to moving position. (D or R)
; It does not get released if the gear shift lever is moved to P or passes through N rapidly.
; Engine on + Brake pedal condition is necessary.
Parking Brake Emergency Release
The following procedure is for releasing the parking brake when EPB failure occurs.
This is the last resort for releasing the EPB when the parking brake cannot be released electrically or by using a diagnosis scanner because of motor or EPB damage, or power line disconnection.
The task must be performed on a flat surface and with safe surroundings. When you release the parking brake, be sure to keep the vehicle stationary.
(Perform this task only after you make sure that preventive measures are taken in case the vehicle moves when the parking brake is released.)

1)
Use a standard hexagonal wrench to remove the screw (A) on the back of the rear caliper (2 of them)
2)
Using the same hexagonal wrench, turn the hexagon part on the floor inside the spindle (B) clockwise by 0.5 - 1 complete turn.
3)
The parking brake is released.
Electronic Parking Brake (EPB) Components and components location
Components   1. EPB Unit 2. EPB Switch 3. Brake Caliper 4. EPB Warning Lamp ...
Electronic Parking Brake (EPB) Schematic diagrams
EPB Circuit Diagram (1) EPB Circuit Diagram (2) EPB connector input/output   Pin No. Function Pin No. ...
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