Hyundai Ioniq: Brake System / Brake Pedal. Repair procedures

Hyundai Ioniq (AE) 2017-2024 Service Manual / Brake System / Brake System / Brake Pedal. Repair procedures

Removal
1.
Turn ignition switch OFF and disconnect the negative (-) battery cable.
2.
Remove the crash pad lower panel.
(Refer to Body - "Crash Pad")
3.
Remove the knee air bag.
(Refer to Restraint - "Knee Airbag (KAB) Module")
4.
Disconnect the stop lamp switch connector (A) and the brake pedal stroke sensor connector (B).

5.
Remove the brake pedal member mounting nut (A).
Tightening torque :
16.7 - 25.5 N.m (1.7 - 2.6 kgf.m, 12.3 - 18.8 lb-ft)

6.
Remove the snap pin (A) and clevis pin (B).

7.
Remove the mounting nuts (A) and then remove the brake pedal.
Tightening torque :
16.7 - 25.5 N.m (1.7 - 2.6 kgf.m, 12.3 - 18.8 lb-ft)

Installation
1.
Install in the reverse of removal.
2.
Check the brake pedal operation.
3.
Conduct calibration after removing the brake pedal assembly.
Adjustment
Brake Pedal Sensor Calibration
The brake pedal sensor calculates the pedal full stroke according to the preset zero. Therefore, zeroing adjustment is necessary when first installed.Calibration must be performed as following cases.
After changing the brake pedal assembly (you cannot change only the sensor).
After changing the IBAU (Intergrated Brake Actuation Unit).
When error codes C1380 (calibration) or C1379 (signal error) are detected.
After bleeding IBAU & PSU line.
Brake Pedal Travel Sensor (PTS) Calibration Procedure
The calibration must be done while the vehicle is parked without stepping on the brake pedal and while there is no vibration on the vehicle.
1.
Connect the GDS. (CAN line or OBD connector)
2.
Turn ignition switch ON.
3.
Select calibration of the brake pedal sensor.
4.
Follow prompts displayed on the GDS screen to complete brake pedal sensor calibration.

5.
Turn ignition switch off after calibration procedure.
6.
Confirm success or failure of calibration.

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