2003 NISSAN TEANA sensor

TROUBLE DIAGNOSIS
ATC-63
C
D
E
F
G
H
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K
L
MA
B
AT C

Mode Door Motor CircuitBJS000G1
SYMPTOM

Air outlet does not change.

Mode door motor does not operate normally.
INSPECTION FLOW
*1ATC-31, "Discharge Air Flow"*2ATC-54, "Operational Check"*3ATC-105, "Intake Sensor Circuit"
*4ATC-47, "FUNCTION CONFIRMA-
TION PROCEDURE", see No. 2 to 6.*5ATC-96, "
Ambient Sensor Circuit"*6ATC-99, "In-vehicle Sensor Circuit"
*7ATC-102, "Sunload Sensor Circuit"*8ATC-66, "Air Mix Door Motor Circuit"*9ATC-47, "FUNCTION CONFIRMA-
TION PROCEDURE", see No. 13.
*10ATC-59, "
DIAGNOSIS PROCE-
DURE FOR LAN CIRCUIT"
*11ATC-123, "MODE DOOR MOTOR"*12ATC-35, "SYMPTOM TABLE"
SJIA1671E

ATC-64
TROUBLE DIAGNOSIS

SYSTEM DESCRIPTION
Component Parts
Mode door control system components are:

Unified meter and A/C amp.

Mode door motor (LCU)

A/C LAN system (PBR built-in mode door motor, air mix door motor and intake door motor)

In-vehicle sensor

Ambient sensor

Sunload sensor

Intake sensor
System Operation
The unified meter and A/C amp. receives data from each of the sensors. The unified meter and A/C amp.
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 unified meter and A/C amp. and each of
the motor position sensors are compared by the LCUs in each door motor with the existing decision and open-
ing angles. Subsequently, HOT/COLD, DEF/VENT and FRE/REC operation is selected. The new selection
data is returned to the unified meter and A/C amp.
RJIA1777E

ATC-66
TROUBLE DIAGNOSIS

Air Mix Door Motor CircuitBJS000G2
SYMPTOM

Discharge air temperature does not change.

Air mix door motor does not operate normally.
INSPECTION FLOW
*1ATC-47, "FUNCTION CONFIRMA-
TION PROCEDURE", see No. 2 to 6.*2ATC-96, "
Ambient Sensor Circuit"*3ATC-99, "In-vehicle Sensor Circuit"
*4ATC-102, "Sunload Sensor Circuit"*5ATC-66, "Air Mix Door Motor Circuit"*6ATC-47, "FUNCTION CONFIRMA-
TION PROCEDURE", see No. 13.
*7ATC-59, "
LAN System Circuit"*8ATC-124, "AIR MIX DOOR MOTOR"*9ATC-54, "Operational Check"
*10ATC-35, "SYMPTOM TABLE"*11ATC-105, "Intake Sensor Circuit"
RJIA3256E

TROUBLE DIAGNOSIS
ATC-67
C
D
E
F
G
H
I
K
L
MA
B
AT C

SYSTEM DESCRIPTION
Component Parts
Air mix door control system components are:

Unified meter and A/C amp.

Air mix door motor (LCU)

A/C LAN system (PBR built-in mode door motor, air mix door motor and intake door motor)

In-vehicle sensor

Ambient sensor

Sunload sensor

Intake sensor
System Operation
The unified meter and A/C amp. receives data from each of the sensors. The unified meter and A/C amp.
sends air mix door, mode door and intake door motor opening angle data to the air mix door motor LCUs,
mode door motor LCU and intake door motor LCU.
The air mix door motors, mode door motor and intake door motor read their respective signals according to the
address signal. Opening angle indication signals received from the unified meter and A/C amp. and each of
the motor position sensors are compared by the LCUs in each door motor with the existing decision and open-
ing angles. Subsequently, HOT/COLD, DEF/VENT and FRE/REC operation is selected. The new selection
data are returned to the unified meter and A/C amp.
Air Mix Door Control Specification
RJIA1781E
RJIA1782E

TROUBLE DIAGNOSIS
ATC-69
C
D
E
F
G
H
I
K
L
MA
B
AT C

Intake Door Motor CircuitBJS000G4
SYMPTOM

Intake door does not change.

Intake door motor does not operate normally.
INSPECTION FLOW
*1AT C - 4 7 , "FUNCTION CONFIRMA-
TION PROCEDURE", see No. 2 to 6.*2AT C - 9 6 , "
Ambient Sensor Circuit"*3AT C - 9 9 , "In-vehicle Sensor Circuit"
*4ATC-102, "Sunload Sensor Circuit"*5AT C - 6 6 , "Air Mix Door Motor Circuit"*6AT C - 4 7 , "FUNCTION CONFIRMA-
TION PROCEDURE", see No. 13.
*7AT C - 5 9 , "
LAN System Circuit"*8AT C - 11 7 , "INTAKE DOOR MOTOR"*9AT C - 5 4 , "Operational Check"
*10AT C - 3 5 , "SYMPTOM TABLE"*11ATC-105, "Intake Sensor Circuit"
SJIA1650E

ATC-70
TROUBLE DIAGNOSIS

SYSTEM DESCRIPTION
Component Parts
Intake door control system components are:

Unified meter and A/C amp.

Intake door motor (LCU)

A/C LAN system (PBR built-in mode door motor, air mix door motor and intake door motor)

In-vehicle sensor

Ambient sensor

Sunload sensor

Intake sensor
System Operation
The intake door control determines intake door position based on the ambient temperature, the intake air tem-
perature and the in-vehicle temperature. When the DEF or OFF switches are pressed or A/C switch is OFF,
the unified meter and A/C amp. sets the intake door at the FRE position.
Intake Door Control Specification
SJIA1651E
RJIA4067E

ATC-72
TROUBLE DIAGNOSIS

Blower Motor CircuitBJS000G5
SYMPTOM: Blower motor operation is malfunctioning.
INSPECTION FLOW
*1AT C - 5 4 , "Operational Check"*2ATC-105, "Intake Sensor Circuit"*3AT C - 4 7 , "FUNCTION CONFIRMA-
TION PROCEDURE", see No. 2.
*4AT C - 4 7 , "
FUNCTION CONFIRMA-
TION PROCEDURE", see No. 6.*5ATC-47, "
FUNCTION CONFIRMA-
TION PROCEDURE", see No. 13.*6AT C - 7 4 , "
DIAGNOSIS PROCE-
DURE FOR BLOWER MOTOR"
*7AT C - 3 5 , "SYMPTOM TABLE"*8ATC-96, "Ambient Sensor Circuit"*9AT C - 9 9 , "In-vehicle Sensor Circuit"
*10ATC-102, "Sunload Sensor Circuit"*11EC-131, "DTC P0117, P0118 ECT
SENSOR" (QR engine) or EC-474,
"DTC P0117, P0118 ECT SEN-
SOR" (VQ engine)
RJIA3261E

TROUBLE DIAGNOSIS
ATC-73
C
D
E
F
G
H
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K
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MA
B
AT C

SYSTEM DESCRIPTION
Component Parts
Fan speed control system components are:

Unified meter and A/C amp.

A/C LAN system (PBR built-in mode door motor, air mix door motor and intake 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 control signal is calculated by the unified meter and A/C amp.
based on the input from the PBR, in-vehicle sensor, sunload sensor, intake sensor and ambient sensor.
The blower motor applied voltage ranges from approximately 3.5 volts (lowest speed) to 12 volts (highest
speed).
The control blower speed (in the range of 3.5 to 12 V), unified meter and A/C amp. supplies a gate voltage to
the fan control amp. Based on this voltage, fan control amp. controls 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.
In the most extreme case (very low ambient) the blower starting delay will be 150 seconds as described
above. After this delay, the blower will operate at low speed until the engine coolant temperature rises above
56°C (133°F), and then the blower speed will increase to the objective speed.
Start up from usual or HOT SOAK Condition (Automatic mode)
The blower will begin operation momentarily after the AUTO switch is pressed. The blower speed will gradu-
ally rise to the objective speed over a time period of 3 seconds or less (actual time depends on the objective
blower speed).
RJIA3262E