INTAKE DOOR MOTOR

Description

SYSTEM DESCRIPTION

Component Parts

Intake door control system components are:

• Front air control
• Intake door motor (LCU)
• In-vehicle sensor
• Ambient sensor
• Sunload sensor
• Intake sensor

System Operation
The intake door control determines intake door position based on the ambient temperature, the intake air temperature and the in-vehicle temperature. When shifting mode position D/F, when the DEF or OFF switches are pressed, or when A/C switch is OFF, the front air. sets the intake door at the FRESH position.

• Intake door does not change.
• Intake door motor does not operate normally.

Inspection FLOW

1. CONFIRM SYMPTOM BY PERFORMING OPERATION CHECK - REC ( )

1. Press the vent mode.( ).
2. Press REC ( ) switch. The REC ( ) indicator should illumination.
3. Press REC ( ) switch again. The REC ( ) indicator should go out.
4. Listen for intake door position change (you should sound change slightly). Can a symptom be duplicated?

YES >> GO TO 3
NO >> GO TO 2

2. PERFORM COMPLETE OPERATIONAL CHECK Perform a complete operational check and check for any symptoms. Refer to See: Initial Inspection and Diagnostic Overview\Inspection And Adjustment\Description And Conditions\Automatic Air Conditioner.

Is the Inspection result normal?
YES >> Refer to See: Symptom Related Diagnostic Procedures\Automatic Air Conditioner System\Symptom Matrix Chart.
NO >> System OK.

3. CHECK FOR SERVICE BULLETINS Check for any service bulletins.

>> GO TO 4

4. CHECK INTAKE DOOR MOTOR OPERATION Check and verify intake door mechanism for smooth operation.

Is the Inspection result normal?
YES >> GO TO 5
NO >> Repair as necessary.

5. CHECK LAN SYSTEM CIRCUIT Perform diagnostic procedure for the LAN system. Refer to See: LAN System Circuit\Automatic Air Conditioner.

Is the Inspection result normal?
YES >> GO TO 6
NO >> Repair as necessary.

6. CHECK AMBIENT SENSOR CIRCUIT Perform diagnostic procedure for the mode door motor. Refer to See: Mode Door\Automatic Air Conditioner.

Is the Inspection result normal?
YES >> GO TO 7
NO >> Repair as necessary.

7. CHECK IN-VEHICLE SENSOR CIRCUIT Perform diagnostic procedure for the in-vehicle sensor circuit. Refer to See: In-Vehicle Sensor\Diagnosis Procedure.

Is the Inspection result normal?
YES >> GO TO 8
NO >> Repair as necessary.

8. CHECK SUNLOAD SENSOR CIRCUIT Perform diagnostic procedure for the sunload sensor circuit. Refer to See: Sunload Sensor\Diagnosis Procedure.

Is the Inspection result normal?
YES >> GO TO 9
NO >> Repair as necessary.

9. CHECK INTAKE SENSOR CIRCUIT Perform diagnostic procedure for the intake sensor circuit. Refer to See: Intake Sensor\Diagnosis Procedure.

Is the Inspection result normal?
YES >> GO TO 10
NO >> Repair as necessary.

10. CHECK AIR MIX DOOR MOTORS PBR CIRCUIT Perform diagnostic procedure for the intake sensor circuit. Refer to See: Air Mix Door\Automatic Air Conditioner.

Is the Inspection result normal?
YES >> GO TO 11
NO >> Repair as necessary.

11. RECHECK FOR SYMPTOMS Perform a complete operational check and check for any symptoms. Refer to See: Initial Inspection and Diagnostic Overview\Inspection And Adjustment\Description And Conditions\Automatic Air Conditioner.

Does another symptom exist?
YES >> Repair as necessary.
NO >> Replace front air control. Refer to See: Control Module HVAC\Service and Repair.

DIAGNOSIS PROCEDURE FOR INTAKE DOOR MOTOR
SYMPTOM: Intake door motor does not operate normally.
Perform diagnosis procedure. Refer to See: LAN System Circuit\Automatic Air Conditioner.