STEP 3. Check the operation of the mode selection damper.
(1) Remove the mode selection damper control motor.
(2) Check if there is any foreign material around the mode lever of the A/C unit, and remove it if necessary.
(3) Operate the blower and turn the mode lever of the A/C unit by hand to check whether the mode selection damper works normally.OK: The air is distributed through the appropriate air outlet (When the mode lever is turned fully toward the vehicle front direction, the air is distributed through the DEF only. When the mode lever is turned fully toward the vehicle rear direction, the air is distributed through the FACE only).
Is the check result normal?
Go to Step 4. Replace the upper case assembly or motor lever.