| DTC B1240 or DTC indicator N: | A Problem in the Mode Control Linkage, Door, or Motor |
| 1. | Clear the DTC with the HDS. |
| 2. | Turn the ignition switch OFF, and then ON (II). |
| 3. | Do the self-diagnostic with the HDS or climate control unit. |
| 4. | Check for DTCs. Is DTC B1240 or N indicated? YES - Go to 5. NO - Intermittent failure.n |
| 5. | Turn the ignition switch OFF. |
| 6. | Test the mode control motor. Is the mode 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.n NO - Replace the mode control motor, or repair the mode control linkage or door.n |