Nissan Altima L32. Manual - part 836

 

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Nissan Altima L32. Manual - part 836

 

 

HAC-118

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

MODE DOOR MOTOR

MODE DOOR MOTOR

Description

INFOID:0000000004498269

SYSTEM DESCRIPTION

Component Parts

Mode door control system components are:

• Front air control

• Mode door motor (LCU)

System Operation

The front air control receives user inputs through its various dials and switches. The front air control sends air

mix door, mode door and intake door opening angle data to the air mix door motor LCU, mode door motor LCU

and intake door motor LCU.

The air mix door motor, mode door motor and intake door motor read their respective signals according to the

address signal. Opening angle indication signals received from the front air control and each of the motor posi-

tion sensors are compared by the LCU's in each motor with the existing decision and opening angles. Subse-

quently, HOT/COLD or DEFROST/VENT or FRESH/RECIRCULATION operation is selected. The new

selection data is returned to the front air control.

COMPONENT DESCRIPTION

Mode Door Motor

AWIIA0043GB

MODE DOOR MOTOR

HAC-119

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

C

D

E

F

G

H

J

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HAC

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P

The mode door motor (1) is attached to the heater and cooling unit

assembly. It rotates so that air is discharged from the outlet set by

the front air control. Motor rotation is conveyed to a link which acti-

vates the mode door.

Diagnosis Procedure

INFOID:0000000004498270

SYMPTOM: Mode door motor and/or air mix door motor does not operate normally.

Perform diagnostic procedure for LAN system circuit. Refer to 

HAC-115, "Diagnosis Procedure"

.

SYMPTOM:

• Air outlet does not change.

• Mode door motor does not operate normally.

INSPECTION FLOW

1.

 CONFIRM SYMPTOM BY PERFORMING OPERATION CHECK - DISCHARGE AIR

1. Press each of the four mode position switches and then press the 

 (DEF) switch. Each position indica-

tor should illuminate.

2. Confirm that discharge air comes out according to the air distribution table. Refer to 

HAC-107, "System

Description"

.

NOTE:
Confirm that the compressor clutch is engaged (visual inspection and intake door position is at 

 (FRESH)

when 

 (DEF) or 

 (D/F) is selected.

Can a symptom be duplicated?

YES

>> GO TO 3

N0

>> GO TO 2 

2.

 PERFORM COMPLETE OPERATIONAL CHECK

Perform a complete operational check and check for any symptoms. Refer to 

HAC-102, "Operational Check"

.

Can a symptom be duplicated?

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 LAN SYSTEM CIRCUIT

Perform diagnostic procedure for the LAN system. Refer to 

HAC-115, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 5

NO

>> Repair as necessary. 

5.

 CHECK MODE DOOR OPERATION

Check and verify mode door mechanism for smooth operation in each mode.
Is the inspection result normal?

YES

>> GO TO 6

NO

>> Repair as necessary.

6.

 CHECK AIR MIX DOOR MOTOR PBR CIRCUIT

AWIIA0022ZZ

HAC-120

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

MODE DOOR MOTOR

Perform diagnostic procedure for the intake sensor circuit. 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 MODE DOOR MOTOR

SYMPTOM: Mode door motor does not operate normally.

Perform diagnosis procedure. Refer to 

HAC-115, "Diagnosis Procedure"

.

AIR MIX DOOR MOTOR

HAC-121

< COMPONENT DIAGNOSIS >

[MANUAL AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

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A

B

HAC

N

O

P

AIR MIX DOOR MOTOR

Description

INFOID:0000000004498271

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 user inputs through its various dials and switches. The front air control sends air

mix door, mode door and intake door opening angle data to the air mix door motor LCU, mode door motor LCU

and intake door motor LCU.

The air mix door motor, mode door motor and intake door motor read their respective signals according to the

address signal. Opening angle indication signals received from the front air control and each of the motor posi-

tion sensors are compared by the LCU's in each motor with the existing decision and opening angles. Subse-

quently, HOT/COLD or DEFROST/VENT or FRESH/RECIRCULATION operation is selected. The new

selection data is returned to the front air control.

COMPONENT DESCRIPTION

Air Mix Door Motor

The air mix door motor (1) is attached to the heater & cooling unit

assembly. It rotates so that the air mix door is opened or closed to a

position set by the front air control. Motor rotation is then conveyed

through a shaft and the air mix door position feedback is then sent to

the front air control by PBR built-in air mix door motor.

WJIA0922E

AWIIA0024ZZ

 

 

 

 

 

 

 

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