Nissan Altima (L32) 2007-2012 Service Manual: Intake door motor
Description
SYSTEM DESCRIPTION
Component Parts
Intake door control system components are: • Front air control
• Intake door motor (LCU)
System Operation
The intake door control determines the intake door position based on the position of the recirculation switch.
When the recirculation switch is depressed the intake door motor rotates closing off the fresh air inlet and recirculating the cabin air. If the recirculation switch is depressed again, the intake door motor rotates in the opposite direction, again allowing fresh air into the cabin.
COMPONENT DESCRIPTION
Intake Door Motor
The intake door motor (1) is attached to the blower unit. It rotates so that air is drawn from inlets set by the front air control. Motor rotation is conveyed to a lever which activates the intake door.
Diagnosis Procedure
SYMPTOM: • 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 HAC-102, "Operational Check".
Is the inspection result normal? YES >> Refer to HAC-155, "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 HAC-115, "Diagnosis Procedure".
Is the inspection result normal? YES >> GO TO 6
NO >> Repair as necessary.
6. CHECK AIR MIX DOOR MOTORS PBR CIRCUIT
Perform diagnostic procedure for the air mix door motor. Refer to HAC-122, "Diagnosis Procedure".
Is the inspection result normal? YES >> GO TO 7
NO >> Repair as necessary.
7. RECHECK FOR SYMPTOMS
Perform a complete operational check and check for any symptoms. Refer to HAC-102, "Operational Check".
Does another symptom exist? YES >> Repair as necessary.
NO >> Replace front air control. Refer to VTL-8, "Removal and Installation".
DIAGNOSIS PROCEDURE FOR INTAKE DOOR MOTOR
SYMPTOM: Intake door motor does not operate normally.
Perform diagnosis procedure. Refer to HAC-115, "Diagnosis Procedure".
Air mix door motor
Description SYSTEM DESCRIPTION Component Parts Air mix door control system components are: • Front air control • Air mix door motor (LCU) System Operation The front air control receives use ...Blower motor
Description SYSTEM DESCRIPTION Component Parts Fan speed control system components are: • Front air control • A/C LAN system (PBR built-in mode door motor, air mix door motor and intake do ...Other materials:
Squeak and rattle trouble diagnoses
Work Flow
CUSTOMER INTERVIEW
Interview the customer if possible, to determine the conditions that exist
when the noise occurs.Use the Diagnostic
Worksheet during the interview to document the facts and conditions when the
noise occurs and any
customer's comments; refer to RF-86, "Diag ...
P0776 pressure control solenoid B
performance (sec pressure solenoid
valve)
Description
The pressure control solenoid valve B (secondary pressure solenoid valve)
regulates the secondary pressure
to suit the driving condition in response to a signal sent from the TCM.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a saf ...
Passenger side
Description
Door glass moves UP/DOWN by receiving the signal from main power window and
door lock/unlock switch or
power window and door lock/unlock switch RH.
Component Function Check
1. CHECK POWER WINDOW MOTOR CIRCIUT
Does power window motor operate with operating main power window and do ...