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Hyundai Tucson: ESC Control unit (HECU) - Adjustment

Hyundai Tucson - Fourth generation (NX4) - (2020-2023) - Workshop Manual / Brake System / ESC (Electronic Stability Control) System / ESC Control unit (HECU) - Adjustment

Adjustment

Perform diagnostic procedure by using diagnostic device as shown below :

  1. Connect self-diagnosis connector (16pins) located under the driver side crash pad to self-diagnosis device, and then torn 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.

Variant Code Reset

Variant Coding

Variant Coding

Longitudinal G Sensor Calibration

Longitudinal G Sensor Calibration

Assembly Check (ECU replacement)

Assembly Check (ECU replacement)

Description

Description

  1. The ESC OFF switch is for the user to turn off the ESC system.
  2. The ESC OFF lamp is on when ESC OFF switch is engaged.

Removal

  1. Disconnect the battery negative ( - ) terminal.
  2. Remove the crash pad lower panel.

    (Refer to Body - "Crash Pad Lower Panel")

  3. Remove the screws and remove the ESC OFF switch (A).

  1. Remove the ESC OFF switch connector (A) by pressing the locking pin.

Installation

Installation

  1. Install in the reverse order of removal

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    Components Front wheel speed sensor Front wheel speed sensor connector Removal Loosen the wheel nuts slightly. Raise the vehicle, and make sure it is securely supported. Remove the front wheel and tire (A) from the front hub.

     Rear wheel speed sensor

    Components 2WD Rear wheel speed sensor 4WD Rear wheel speed sensor Rear wheel speed sensor- Removal- 2WD Removal 2WD Loosen the wheel nuts slightly. Raise the vehicle, and make sure it is securely supported. Remove th

     Rear wheel speed sensor- Replacement

    Replacement Remove the rear wheel hub bearing assembly. (Refer to Drivesliaft and Axle - "Rear Hub - Carrier") Fix the rear hub bearing assembly (A) on the vise. WARNING When fixing on the vise, use a cloth not to be damaged

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    Component Location Rear seat cushion assembly Rear seat back assembly Replacement Rear seat cushion assembly Remove the rear seat cushion assembly (A). Press the lock pin, separate the connectors (A). To inst

     Lever Type

    Removal Disconnect the negative (-) battery cable. Release the parking brake. Remove the floor console assembly. (Refer to Body - "Floor Console Assembly") Remove the cable retainer and remove the parking brake cable (A). WAR

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