Hyundai Tucson: Coupling Assembly- Installation

Hyundai Tucson - Fourth generation (NX4) - (2020-2023) - Workshop Manual / Wheel Drive (4WD) System / Coupling Assembly / Coupling Assembly- Installation

  1. To install, reverse the removal procedures.


  • Smear the splines (A) with molybdenum type high pressure grease.
  • When install the coupling, be careful not to damage the oil seal (B).
  1. After replacing the coupling, reset the 4WD ECU's clutch learing using the diagnostic tool.

    (Refer to 4WD Control System - "Repair procedures")


The 4WD ECM controls the Pump Motor Pump (Actuator) to generating an oil pressure. The pressure engages a multiple disk clutch to transfer torque to the rear wheels. The torque to the rear wheels varies according to the pressure on the clutch.

Circuit Diagram

Circuit Diagram




If you have trouble code related to the oil hydraulic motor (actuator), check oil hydraulic motor (acmator) according to the inspection process.


     Oil Hydraulic Motor (Actuator) Inspection Procedure

    Removal Remove the coupling assembly. (Refer to 4 Wheel Drive (4WD) System - "Direct Electro Hydraulic Actuator Coupling") Keep going perpendicular state after remove the coupling assembly. WARNING Keep going perpend

     Measuring the resistance of the pressure sensor

    Turn ignition switch OFF. Disconnect the pressure sensor connector. Measure resistance between sensor terminal and terminal. Check the measured resistance. (Refer to table) Table 1 Removal Remove the coupling assembly. (Refer to

     Measuring the resistance of the pressure sensor- Adjustment

    Adjustment Description The friction material inside the coupling will degrade over time. Therefore, corresponding compensation values must be referenced and entered after replacing the controller or the coupling. Compensation Requirement and Pr


     Climate control additional features

    Auto Defogging System on Models with Automatic Temperature Control Auto defogging helps reduce the possibility of fogging up the inside of the windshield by automatically sensing the moisture on inside the windshield. The auto defogging sy

     DCT (Dual Clutch Transmission) System (SBW)- Installation

    Installation To install, reverse the removal procedure. WARNING Matters that require attention when installing the dual clutch transmission (DCT) to engine l)Check the pilot bearing (B) and external damper (A) 011 the side of engine for