
1. Front - right (FR)
2. Rear - left (RL)
3. Rear - right (RR)
4. Front - left (FL)
5. MC2
6. MC1
7. ESC Control unit (HECU) connector
8. Bracket
1.Disconnect the battery negative ( - ) terminal.
2.Pull up the lock of the ESC control unit (HECU) connector and then disconnect the connector (A).

3.Separate the brake tube by removing the flare nuts (A), (B) connected to the ESC control unit (HECU).
Tightening torque :(A) : 13.7 - 16.7 N·m (1.4 - 1.7 kgf·m, 10.1 - 12.3 lb·ft)(B) : 18.6 - 22.6 N·m (1.9 - 2.3 kgf·m, 13.7 - 16.6 lb·ft)


4.Remove the bracket mounting nuts and remove the ESC control unit (HECU) (A) from the vehicle.
Tightening torque :16.7 - 25.5 N·m (1.7 - 2.6 kgf·m, 12.3 - 18.8 lb·ft)

5.Remove the bolts to remove the bracket (B) from the ESC control unit (HECU) (A).

1.Install in the reverse order of removal.
2.After installation, bleed the brake system. (Refer to Brake System - "Brake Bleeding Procedures")
3.Conduct the Variant Coding.
4.Conduct the Auto Detected Sensor Calibration.
5.Conduct the Longitudinal G Sensor Calibration.
6.After replacing the ESC control unit execute the "Assembly Check (ECU replacement)" of the additional function to check that the mounting is successful.
1.Connect self-diagnosis connector (16pins) located under the driver side crash pad to self-diagnosis device, and then turn the self-diagnosis device after key is ON.
2.Select the "vehicle model" and "ABS/ESC" on diagnostic tool vehicle selection screen, then select OK.





Schematic Diagrams
ESC OFF SwitchHyundai Tucson (NX4) 2022-2026 Service Manual: Brake Booster
- Components
1. Reservoir cap2. Reservoir3. Brake booster4. Master cylinder5. Push rod
- Brake Booster Operating Test
1.Run the engine for one or two minutes, and then stop it. If the
pedal depresses fully the first time but gradually becomes higher when
depressed succeeding times, ...
Hyundai Tucson (NX4) 2022-2026 Owner's Manual: Instrument Cluster Control
Instrument panel illumination
When the vehicle’s parking lights or
headlights are on, press the illumination
control switch to adjust the brightness of
the instrument panel illumination.
You can adjust the brightness of the
instrument panel illumination from the
Settings menu in the in ...