1. Disconnect the ground cable from battery.
2. Remove the ornament panel. 
3. Remove the control wires from both sides of the heater and cooling unit.
4. Remove the screw and claw to detach the control unit from the ornament panel RH.
HVAC SYSTEM (HEATER, VENTILATOR AND A/C) > Control Unit (Manual A/C Model)
1. Disconnect the ground cable from battery.
2. Remove the ornament panel.
3. Remove the control wires from both sides of the heater and cooling unit.
4. Remove the screw and claw to detach the control unit from the ornament panel RH.