For vehicles with the rear air conditioning system, it has two fan speed selectors. One fan speed selector is located in the front overhead console and the other is located in the headliner above the second row seats. The rear air conditioning system is designed to provide cooled air only.
To operate the rear system using the front control, turn the knob to the fan position desired.
To use the rear control, turn the front control to AUX, then use the rear control to increase and decrease the airflow.