Elantra & Sonata

Attach tension gauge to deepest hole in center of lid lower panel. Driving force of motor should be 33.1-55.7 lbs. (15-25 kg). If driving force is not as specified, adjust torque adjustment nut on sunroof motor, clockwise to increase torque and counterclockwise to reduce torque. After adjustment, lock nut with pawl washer. See Fig 1.

Fig 1: Identifying Sunroof Motor Torque Adjustment

Courtesy of HYUNDAI MOTOR CO.