Kia Soul EV: Parking Brake System / Electric Parking Brake (EPB) Description and Operation
Description of EPB
EPB is an electronic parking brake. Unlike existing parking
systems that operate by brake pedals or levers, the EPB system sends a
signal to the ECU when the driver operates the EPB switch. The ECU then
operates the EPB actuator with motor gears to push the piston in the
caliper to generate braking force. The main functions of EPB are as
follows:
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Emergency braking when hydraulic brake malfunctions |
| 1. |
Switch Operation at Stationary Condition (Static Park)
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Manually engage the parking brake by operating the EPB switch at stationary condition. |
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With the ignition switch ON, the parking brake is engaged by the Reduced Clamp Force on a slope of less than 8%. |
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Otherwise, it is always engaged by the Full Clamp Force. |
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| 2. |
Switch Release at Stationary Condition (Static Release)
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Release the parking brake by manually operating the EPB switch at stationary condition. |
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To secure safety, it is only released with ignition switch ON and the brake pedal pressed. |
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| 3. |
Dynamic Emergency Braking (Dynamic Braking)
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Electric Controlled Deceleration (ECD)
When operating the EPB switch while driving, the operation
request is sent to VDC only when the switch is in operation so that
hydraulic braking is performed by the VDC instead of the EPB actuator. |
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Rear Wheel Unlocker (RWU)
: If the VDC does not normally operate (VDC Fail) when the
EPB switch is operated while driving and wheel speed information can be
obtained, the EPB actuator will independently maintain the safe movement
of the vehicle to perform braking only during the switch operation. |
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Slow Ramp Up (SRU)If the VDC does not normally operate (VDC
Fail) when the EPB switch is operated while driving and wheel speed
information cannot be obtained, the EPB will independently and gradually
increase the parking force to perform braking only during the switch
operation.
gradually to perform braking only during the |
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| 4. |
Automatic Application of EPB Force (Auto Apply)
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When the vehicle is stopped while the Auto Vehicle Hold (AVH)
is switched ON, the EPB will be automatically applied after the engine
has turned off. |
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| 5. |
Automatic Release of EPB Force (Drive Away Release)
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The parking brake will be automatically released when pressing the accelerator pedal with the EPB engaged. |
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To secure safety for automatic release, it will be automatically released only when all of the following conditions are met: |
| 3) |
Door, trunk and hood closed |
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To prevent the vehicle from being moved downwards on a slope
way, it will be automatically released only when driving torque above
specific level based on the slope has been obtained. |
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| 6. |
Reapplication of EPB Force When Vehicle Moves Downwards (Roll Away Reclamp)
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Additional EPB force is generated when a downward vehicle movement is detected after applying EPB force. |
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With the engine OFF, this function is enabled only when the
wheel speed information can be received (i.e., for 3 minutes after the
engine has turned off). |
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| 7. |
P to X (Automatic Release of EPB Force for Gear Shifting)
When moving the gearshift lever from the P or N position to
the D or R position, the parking brake will be automatically released.
However, it will be possible only with the engine ON and the
brake pedal pressed, in order to secure safety for automatic release. |
Components
1. EPB Unit2. EPB Switch3. Brake Caliper 4. EPB Warning Lamp5. Brake Warning Lamp
...
EPB Circuit Diagram (1)
EPB Circuit Diagram (2)
EPB connector input/output
Pin DescriptionPin Description1WC-CAN (High)21G/BCenter Fascia Switch (ElectronicParking Brake Switch (SW3 ...
Other information:
Removal
Put on gloves to protect your hands.
•
When prying with a flat-tip screwdriver, wrap it with
protective tape, and apply protective tape around the related parts, to
prevent damage.
•
Use a plastic panel ...
Removal
1.
Turn ignition switch OFF and disconnect the negative (-) battery cable.
2.
Remove the crash pad lower panel.
(Refer to Body - "Crash Pad Lower Panel")
3.
Remove the lower crash pad switch assembly (A) by pushing it.
4.
Disconnect the connectors (A) from the lower crash p ...
Electric Parking Brake (EPB) Components and Components Location
Electric Parking Brake (EPB) Schematic Diagrams