Inspection Procedure 2

When the Air Outlet Selection Control Knob is Moved to Defroster or Defroster/Foot Position, the A/C or the Outside/inside Air Selection Damper Motor does not operate.

TECHNICAL DESCRIPTION (COMMENT)
If the outside/inside air selection damper motor does not operate normally, the outside/inside air selection damper motor system may be defective.

TROUBLESHOOTING HINTS
- Malfunction of the heater control
- Malfunction of the outside/inside air selection damper motor

DIAGNOSIS

Required Special Tools:
- MB991223: Test Harness Set

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

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

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

YES: Replace the heater control.

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