Kia Optima Hybrid Owner's Manual Quiz
Brake System

Brake Pedal Repair Procedures

In this manual: Brake System
General Information — 4Engine Mechanical System — 50Engine Electrical System — 20Emission Control System — 30Engine Control System/Fuel System — 84Automatic Transmission — 98Drive Shaft and Axle — 15Suspension System — 36Steering — 12Restraints — 50Brake System — 38Body (Interior and Exterior) — 54Body Electrical System — 233Heating, Ventilation, and Air Conditioning — 57
29steps
~174min
4/5difficulty
0102030405012.79N·mlb·ft
Tightening torque found on this page
Done 0 of 29

Removal

  1. Turn the ignition switch OFF and disconnect the negative (-) battery cable.
  2. Remove the lower airbag panel and reinforcement panel. (Refer to Body - Airbag Pad)
  3. Remove the shower duct (A).
  4. Pull down the steering column shaft after removing the bolts and nuts. (Refer to Steering Group - Steering Column and Shaft)
  5. Disconnect the stop lamp switch connector (A) and the brake pedal travel sensor connector (B).
  6. Remove the brake pedal mounting nut (A).
  7. Remove the lock pin (A) and the flat head pin (B).
  8. Remove the brake pedal assembly mounting nuts (A), then remove the brake pedal assembly.

    Tightening torque: 10.8 ~ 12.7 N·m

Installation

  1. Installation is the reverse of removal.
  2. Check the brake pedal operation.
  3. Perform calibration after removing the brake pedal assembly.
Brake Pedal Sensor Calibration. The brake pedal sensor calculates the full pedal travel based on the set zero point. Therefore, zero point adjustment is required when first installed. Calibration must be performed in the following cases.
  • After replacing the brake pedal assembly (the sensor cannot be replaced separately)
  • After replacing the BAU (Brake Actual Unit)
  • When DTC C1380 (calibration) or C1379 (signal error) is detected.
  • After bleeding the IBAU and PSU lines.
Calibration Procedure. Calibration must be performed when the vehicle is parked, the brake pedal is not depressed, and there is no vehicle vibration.
  1. Connect GDS. (CAN line or OBD connector)
  2. Turn the ignition on.
  3. Select brake pedal sensor calibration.
  4. Follow the prompts displayed on the GDS screen to complete the brake pedal sensor calibration.
  5. Turn the ignition OFF after the calibration procedure.
  6. Check whether the calibration was successful or failed.

Brake Light Switch Clearance Adjustment

Removal
  1. Turn the ignition switch OFF and disconnect the negative (-) battery cable.
  2. Remove the lower airbag panel and reinforcement panel. (Refer to Body - Airbag Pad)
  3. Remove the shower duct (A).
  4. Pull down the steering column shaft after removing the bolts and nuts. (Refer to Steering Group - Steering Column and Shaft)
  5. Disconnect the stop lamp switch connector (A) and the brake pedal travel sensor connector (B).
  6. Pull the lock plate (A) as shown by the arrow.
  7. Turn the stop lamp switch 45° counterclockwise and remove it.
  8. While holding the brake pedal lever, fully insert the stop lamp switch.
  9. After installation, turn the stop lamp switch 45° clockwise, then complete assembly by pressing the lock plate.
  10. Check the clearance between the stop lamp switch and the bracket.

    Brake light switch clearance: 1.0 ~ 2.0 mm (0.04 ~ 0.08 in.)
    If the clearance between the stop lamp switch and the bracket is not 1.0 - 2.0 mm (0.04 - 0.08 in.), repeat the above procedure.
  11. Connect the stop lamp switch connector.
  12. Installation is the reverse of removal.
Installation

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