2003 NISSAN ALMERA N16 door motor

TROUBLE DIAGNOSIS
ATC-59
C
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MA
B
AT C
6.CHECK MOTOR OPERATION
Disconnect and reconnect the motor connector and confirm the motor operation.
OK or NG
OK >> (Return to operate normally.)
●Poor contacting the motor connector
NG >> (Does not operate normally.)
●GO TO 7
7.CHECK MODE DOOR MOTOR OPERATION
1. Disconnect mode door motor and air mix door motor connector.
2. Reconnect mode door motor connector and confirm the mode door motor operation.
OK or NG
OK >> (Mode door motor operates normally.)
●GO TO 8
NG >> (Mode door motor does not operate normally.)
●Replace the mode door motor.
8.CHECK AIR MIX DOOR MOTOR OPERATION
1. Disconnect mode door motor connector.
2. Reconnect air mix door motor connector and confirm the air mix door motor operation.
OK or NG
OK >> (Air mix door motor operates normally.)
●GO TO 9
NG >> (Air mix door motor does not operate normally.)
●Replace the air mix door motor.
9.CHECK INTAKE DOOR MOTOR OPERATION
1. Disconnect air mix door motor connector.
2. Reconnect intake door motor connector and confirm the intake door motor operation.
OK or NG
OK >> (Intake door motor operates normally.)
●Replace auto amp.
NG >> (Intake door motor does not operate normally.)
●Replace intake door motor.
Mode Door Motor CircuitEJS001ZL
SYMPTOM:
●Air outlet does not change.
●Mode door motor does not operate normally.

ATC-60
TROUBLE DIAGNOSIS
INSPECTION FLOW
*1AT C - 2 7 , "Discharge Air Flow"*2ATC-51, "Operational Check"*3AT C - 4 2 , "Self-diagnosis Function",
see No.1
*4AT C - 4 2 , "
Self-diagnosis Function",
see No. 5*5ATC-100, "Ambient Sensor Circuit"*6ATC-102, "In-vehicle Sensor Circuit"
*7ATC-105, "Sunload Sensor Circuit"*8ATC-63, "Air Mix Door Motor Circuit"*9AT C - 4 2 , "Self-diagnosis Function",
see No.14
*10AT C - 5 7 , "
LAN System Circuit"*11ATC-62, "COMPONENT DESCRIP-
TION"
*12AT C - 5 1 , "Operational Check"
*13AT C - 2 9 , "SYMPTOM TABLE"*14ATC-108, "Intake Sensor Circuit"*15AT C - 5 2 , "CHECKING DISCHARGE
AIR"
RJIA1693E

TROUBLE DIAGNOSIS
ATC-61
C
D
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MA
B
AT C
SYSTEM DESCRIPTION
Component Parts
Mode door control system components are:
●Auto amp.
●Mode door motor (LCU)
●A/C LAN system (PBR built-in air mix door motor, mode door motor and intake door motor)
●In-vehicle sensor
●Ambient sensor
●Sunload sensor
●Intake sensor
System Operation
The auto amplifier receives data from each of the sensors. The amplifier 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 auto amplifier and each of the motor posi-
tion sensors are compared by the LCUs 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 auto amplifier.
Mode Door Control Specification
RJIA0773E
RHA384HA

ATC-62
TROUBLE DIAGNOSIS
COMPONENT DESCRIPTION
Mode Door Motor
The mode door motor is attached to the heater & cooling unit. It
rotates so that air is discharged from the outlet set by the auto ampli-
fier. Motor rotation is conveyed to a link which activates the mode
door.
DIAGNOSTIC PROCEDURE FOR MODE DOOR
SYMPTOM: Mode door motor does not operate normally.
Perform diagnostic procedure for LAN system circuit. Refer to AT C - 5 7 , "
LAN System Circuit" .
RJIA0774E
RJIA0775E

TROUBLE DIAGNOSIS
ATC-63
C
D
E
F
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MA
B
AT C
Air Mix Door Motor CircuitEJS001ZM
SYMPTOM:
●Discharge air temperature does not change.
●Air mix door motor does not operate.
INSPECTION FLOW
*1AT C - 4 2 , "Self-diagnosis Function",
see No.1*2ATC-100, "Ambient Sensor Circuit"*3ATC-102, "In-vehicle Sensor Circuit"
*4ATC-105, "Sunload Sensor Circuit"*5AT C - 6 3 , "Air Mix Door Motor Cir-
cuit"
*6AT C - 4 2 , "Self-diagnosis Function",
see No. 14.
*7AT C - 5 7 , "
LAN System Circuit"*8AT C - 5 1 , "Operational Check"*9AT C - 5 1 , "Operational Check"
*10AT C - 2 9 , "SYMPTOM TABLE"*11ATC-108, "Intake Sensor Circuit"*12AT C - 4 2 , "Self-diagnosis Function",
see No. 7
RJIA1694E

ATC-64
TROUBLE DIAGNOSIS
SYSTEM DESCRIPTION
Component Parts
Air mix door control system components are:
●Auto amp.
●Air mix door motor (LCU)
●A/C LAN system (PBR built-in air mix door motor, mode door motor and intake door motor)
●In-vehicle sensor
●Ambient sensor
●Sunload sensor
●Intake sensor
System Operation
The auto amplifier receives data from each of the sensors. The amplifier sends air mix door, mode door and
intake door motor 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 auto amplifier and each of the motor posi-
tion sensors are compared by the LCUs 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 auto amplifier.
Air Mix Door Control Specification
RJIA0777E
RHA457H

TROUBLE DIAGNOSIS
ATC-65
C
D
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F
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H
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MA
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AT C
COMPONENT DESCRIPTION
Air Mix Door Motor
The air mix door motor is attached to the heater & cooling unit. It
rotates so that the air mix door is opened or closed to a position set
by the auto amplifier. The air mix door position is then fed back to the
auto amplifier by PBR built-in air mix door motor.
DIAGNOSTIC PROCEDURE FOR AIR MIX DOOR MOTOR
SYMPTOM: Discharge air temperature does not change.
Perform diagnostic procedure for LAN system circuit. Refer to ATC-57, "
LAN System Circuit" .
RJIA0774E
RJIA0775E

ATC-66
TROUBLE DIAGNOSIS
Intake Door Motor Circuit
EJS001ZN
SYMPTOM:
●Intake door does not change.
●Intake door motor does not operate normally.
INSPECTION FLOW
*1 AT C - 4 2 , "Self-diagnosis Function" ,
see No.1*2ATC-100, "Ambient Sensor Circuit"*3AT C - 1 0 2 , "In-vehicle Sensor Circuit"
*4ATC-105, "Sunload Sensor Circuit"*5ATC-63, "Air Mix Door Motor Circuit"*6AT C - 4 2 , "Self-diagnosis Function",
see No. 14.
*7AT C - 5 7 , "
LAN System Circuit"*8ATC-67, "COMPONENT DESCRIP-
TION"
*9AT C - 5 1 , "Operational Check"
RJIA1695E