2003 NISSAN ALMERA N16 door motor

TROUBLE DIAGNOSIS
ATC-67
C
D
E
F
G
H
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K
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MA
B
AT C
SYSTEM DESCRIPTION
Component Parts
Intake door control system components are:
●Auto amp.
●Intake 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.
COMPONENT DESCRIPTION
Intake Door Motor
The intake door motor is attached to the intake unit. It rotates so that
air is drawn from inlets set by the auto amplifier. Motor rotation is
conveyed to a lever which activates the intake door.
*10AT C - 4 2 , "Self-diagnosis Function",
see No.5 or 7*11AT C - 5 1 , "Operational Check"*12AT C - 2 9 , "SYMPTOM TABLE"
*13ATC-108, "Intake Sensor Circuit"
RJIA0781E
RJIA0782E

ATC-68
TROUBLE DIAGNOSIS
DIAGNOSTIC PROCEDURE FOR INTAKE DOOR MOTOR
SYMPTOM: Intake door motor does not operate normally.
Perform diagnostic procedure for LAN system circuit. Refer to AT C - 5 7 , "
LAN System Circuit" .
RJIA0783E

ATC-70
TROUBLE DIAGNOSIS
SYSTEM DESCRIPTION
Component Parts
Fan speed control system components are:
●Auto amp.
●A/C LAN system (PBR built-in air mix door motor, mode door motor and intake door motor)
●Fan control amp.
●In-vehicle sensor
●Ambient sensor
●Sunload sensor
●Intake sensor
System Operation
Automatic Mode
In the automatic mode, the blower motor speed is calculated by the automatic amplifier based on input from
the PBR, in-vehicle sensor, sunload sensor, intake sensor and ambient sensor.
The blower motor applied voltage ranges from approximately 4 volts (lowest speed) to 12 volts (highest
speed).
The control blower speed (in the range of 4 to 12V), the automatic amplifier supplies a gate voltage to the fan
control amplifier. Based on this voltage, the fan control amplifier controls the voltage supplied to the blower
motor.
Starting Fan Speed Control
Start Up From COLD SOAK Condition (Automatic mode)
In a cold start up condition where the engine coolant temperature is below 56°C (133°F), the blower will not
operate for a short period of time (up to 150 seconds). The exact start delay time varies depending on the
ambient and engine coolant temperature.
*1AT C - 4 2 , "Self-diagnosis Function"*2AT C - 4 2 , "Self-diagnosis Function",
see No.14.*3AT C - 6 9 , "Blower Motor Circuit"
*4AT C - 5 1 , "Operational Check"*5AT C - 2 9 , "SYMPTOM TABLE"*6 QG engine (With EURO–OBD): EC-
144, "DTC P0117, P0118 ECT SEN-
SOR"
QG engine (Without EURO–OBD):
EC-501, "
DTC P0117, P0118 ECT
SENSOR"
YD engine: EC-84, "DTC 0115
COOLANT TEMP SEN"
RJIA0785E

TROUBLE DIAGNOSIS
ATC-75
C
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F
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K
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MA
B
AT C
Magnet Clutch CircuitEJS001ZP
SYMPTOM: Magnet clutch does not engage.
INSPECTION FLOW
*1ATC-42, "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 Circuit"*6ATC-42, "Self-diagnosis Function",
see No. 14.
*7ATC-75, "
Magnet Clutch Circuit"*8AT C - 9 2 , "TROUBLE DIAGNOSES
FOR UNUSUAL PRESSURE"
*9ATC-51, "Operational Check"
*10ATC-42, "Self-diagnosis Function"
see No.5 or 7.*11AT C - 2 9 , "
SYMPTOM TABLE"*12ATC-108, "Intake Sensor Circuit"
RJIA1697E

ATC-86
TROUBLE DIAGNOSIS
Insufficient Cooling
EJS001ZQ
SYMPTOM: Insufficient cooling
INSPECTION FLOW
*1ATC-42, "Self-diagnosis Function",
see No.1.*2ATC-63, "Air Mix Door Motor Circuit"*3ATC-90, "Test Reading (Gasoline
Engine)"
ATC-90, "Test Reading (Diesel
Engine)"
*4ATC-42, "Self-diagnosis Function",
see No.14.*5ATC-57, "LAN System Circuit"*6ATC-69, "Blower Motor Circuit"
RJIA1708E

ATC-88
TROUBLE DIAGNOSIS
PERFORMANCE TEST DIAGNOSES
*1ATC-90, "PERFORMANCE CHART"*2ATC-90, "PERFORMANCE CHART"*3AT C - 9 2 , "TROUBLE DIAGNOSES
FOR UNUSUAL PRESSURE"
*4 ATC-63, "Air Mix Door Motor Circuit"
RHA281I

TROUBLE DIAGNOSIS
ATC-95
C
D
E
F
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H
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K
L
MA
B
AT C
Insufficient HeatingEJS001ZR
SYMPTOM: Insufficient heating
INSPECTION FLOW
*1ATC-51, "Operational Check"*2ATC-42, "Self-diagnosis Function",
see No.1.*3AT C - 4 2 , "Self-diagnosis Function",
see No.5.
*4ATC-42, "
Self-diagnosis Function",
see No.7.*5ATC-63, "Air Mix Door Motor Circuit"*6AT C - 4 2 , "Self-diagnosis Function",
see No.14.
RJIA1709E

ATC-96
TROUBLE DIAGNOSIS
*7AT C - 5 7 , "LAN System Circuit"*8ATC-69, "Blower Motor Circuit"*9AT C - 6 3 , "Air Mix Door Motor Circuit"
*10 QG engine (With EURO–OBD): EC-
144, "DTC P0117, P0118 ECT SEN-
SOR"
QG engine (Without EURO–OBD):
EC-501, "
DTC P0117, P0118 ECT
SENSOR"
YD engine: EC-84, "P0115 COOL-
ANT TEMP SEN" *11 QG engine: LC-17, "Changing
Engine Coolant"
YD engine: LC-43, "Changing
Engine Coolant" *12 QG engine: LC-17, "Changing
Engine Coolant"
YD engine: LC-43, "Changing
Engine Coolant"