Nissan Altima L32. Instruction — part 837
HAC-122
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
AIR MIX DOOR MOTOR
Diagnosis Procedure
INFOID:0000000004498272
SYMPTOM:
• Discharge air temperature does not change.
• Air mix door motor does not operate.
INSPECTION FLOW
1.
CONFIRM SYMPTOM BY PERFORMING OPERATION CHECK - TEMPERATURE INCREASE
1. Turn the temperature control dial clockwise to maximum heat.
2. Check for hot air at discharge air outlets.
>> GO TO 2
2.
CONFIRM SYMPTOM BY PERFORMING OPERATION CHECK - TEMPERATURE DECREASE
1. Turn the temperature control dial counterclockwise to maximum cold.
2. Check for cold air at discharge air outlets.
Can a symptom be duplicated?
YES
>> GO TO 4
NO
>> GO TO 3
3.
PERFORM COMPLETE OPERATIONAL CHECK
Perform a complete operational check and check for any symptoms. Refer to
.
Is the inspection result normal?
YES
>> Refer to
HAC-155, "Symptom Matrix Chart"
.
NO
>> System OK.
4.
CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
>> GO TO 5
5.
CHECK AIR MIX DOOR MOTOR OPERATION
Check and verify air mix door mechanism for smooth operation.
Is the inspection result normal?
YES
>> GO TO 6
NO
>> Repair as necessary.
6.
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 7
NO
>> Repair as necessary.
7.
CHECK AIR MIX DOOR MOTOR PBR CIRCUIT
Perform diagnostic procedure for the intake sensor circuit. Refer to
HAC-122, "Diagnosis Procedure"
.
Is the inspection result normal?
YES
>> GO TO 8
NO
>> Repair as necessary.
8.
RECHECK FOR SYMPTOMS
Perform a complete operational check and check for any symptoms. Refer to
.
Does another symptom exist?
YES
>> Repair as necessary.
NO
>> Replace front air control. Refer to
VTL-8, "Removal and Installation"
.
DIAGNOSIS PROCEDURE FOR AIR MIX DOOR MOTOR
AIR MIX DOOR MOTOR
HAC-123
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
C
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HAC
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SYMPTOM: Discharge air temperature does not change.
Perform diagnosis procedure. Refer to
HAC-124
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
INTAKE DOOR MOTOR
INTAKE DOOR MOTOR
Description
INFOID:0000000004498273
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
INFOID:0000000004498274
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.(
).
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AWIIA0027ZZ
INTAKE DOOR MOTOR
HAC-125
< COMPONENT DIAGNOSIS >
[MANUAL AIR CONDITIONER]
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E
F
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A
B
HAC
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P
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
.
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
.
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
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