DTC Troubleshooting: 3

DTC indicator 3:  A Problem in the Air Mix Control Linkage, Door, or Motor

1.Clear the DTC.

2.Turn the ignition switch OFF, and then ON (II).

3.Do the self-diagnostic with the HVAC control unit.

4.Check for DTCs.

Is DTC 3 indicated?

YES - Go to 5.

NO - Intermittent failure.n

5.Turn the ignition switch OFF.

6.Test the air mix control motor.

Is the air mix control motor OK?

YES - Substitute a known-good HVAC control unit, and recheck. If the symptom/indication goes away, replace the original  HVAC control unit.n

NO - Replace the air mix control motor, or repair the air mix control linkage or door.n