Repair procedures: Replacement

Prior to replacing the 4WD ECU, check the 4WD ECU's clutch learning with the GDS tool.
(Refer to 4WD Control System - "ADJUSTMENT ")
Disconnect the battery negative cable from the battery
Disconnect the 4WD ECU connector (A).

Fig 1: 4WD ECU Connector
Courtesy of HYUNDAI MOTOR AMERICA
Loosen the nuts (A) and then remove the 4WD ECU.
Tightening torque:

9.8 ~11.8N.m (1.0~1.2kgf.m, 7.2~8.7lb-ft)

Fig 2: 4WD ECU Nuts
Courtesy of HYUNDAI MOTOR AMERICA