DTC indicator Q or DTC B1238: A Problem in the Passenger's Air Mix Control Linkage, Door, or Motor Clear the DTC. Turn the ignition switch OFF, and then ON. Operate the climate control system is several modes. Check the DTCs. Is DTC Q or B1238 indicated?
YES | - | Go to Step 5 .
NO | - | Intermittent failure.■
Test the passenger's air mix control motor. Is the passenger's air mix control motor OK?
YES | - | Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit .■
NO | - | Replace the passenger's air mix control motor, or repair the passenger's air mix control linkage or door.■