Inspection Procedure 2

When the Air Outlet Changeover Control Knob is Moved to Defroster or Defroster/Foot Position, the A/C or the Inside/outside Air Changeover Damper Motor does not operate.

CIRCUIT OPERATION
If the inside/outside air changeover damper motor does not operate normally, the inside/outside air changeover damper motor system may be defective.

TROUBLESHOOTING HINTS
- Malfunction of the A/C-ECU
- Malfunction of the inside/outside air changeover damper motor
- Damaged harness wires or connectors

Required Special Tools:
- MB991223: Test Harness Set

STEP 1. Check operations of the outside/inside air selection damper control motor.

1. Ignition switch: ON
2. Outside/Inside Air Selection Damper Motor Switch: This is used to switch from the inside air to outside air or vice versa.
3. Check to see that the outside/inside air selection damper motor operates normally.

Q: Does outside/inside air selection damper control motor work normally?

YES: Replace the A/C-ECU.

NO: Refer to Inspection procedure 3 "Inside / Outside Air changeover is not possible."