NISSAN X-TRAIL 2005 Service Repair Manual

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

Mode Door Motor CircuitEJS004GX
SYMPTOM:

Air outlet does not change.

Mode door motor does not operate normally.
INSPECTION FLOW
*1ATC-32, "Discharge Air Flow".*2ATC-65, "Operational Check".*3ATC-59, "FUNCTION CONFIRMA-
TION PROCEDURE", see No. 1.
*4ATC-59, "
FUNCTION CONFIRMA-
TION PROCEDURE", see No. 5 to
7.*5ATC-109, "
Ambient Sensor Circuit".*6AT C - 111 , "In-Vehicle Sensor Cir-
cuit".
*7ATC-114, "
Sunload Sensor Circuit".*8ATC-117, "Intake Sensor Circuit".*9ATC-76, "Air Mix Door Motor Cir-
cuit".
RJIA3095E

ATC-74
TROUBLE DIAGNOSIS

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 amp. receives data from each of the sensors. The auto 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 auto amp. and each of the motor position
sensors are compared by the LCUs in each motor with the existing decision and opening angles. Subse-
quently, HOT/COLD or DEF/VENT or FRESH/RECIRCULATION operation is selected. The new selection
data is returned to the auto amp.
Mode Door Control Specification
*10ATC-59, "FUNCTION CONFIRMA-
TION PROCEDURE", see No. 9.*11AT C - 6 9 , "
LAN System Circuit".*12ATC-134, "MODE DOOR MOTOR".
*13ATC-34, "
SYMPTOM TABLE".
RJIA2828E
RHA384HA

TROUBLE DIAGNOSIS
ATC-75
C
D
E
F
G
H
I
K
L
MA
B
AT C

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 amp.
Motor rotation is conveyed to a link which activates the mode door.
DIAGNOSTIC PROCEDURE FOR MODE DOOR MOTOR
SYMPTOM: Mode door motor does not operate normally.
Perform diagnostic procedure. Refer to AT C - 6 9 , "
DIAGNOSTIC PROCEDURE FOR LAN CIRCUIT" .
RJIA0513E
RJIA0514E

ATC-76
TROUBLE DIAGNOSIS

Air Mix Door Motor CircuitEJS004GY
SYMPTOM:

Discharge air temperature does not change.

Air mix door motor does not operate.
INSPECTION FLOW
*1AT C - 6 5 , "Operational Check".*2AT C - 5 9 , "FUNCTION CONFIRMA-
TION PROCEDURE", see No. 1.*3ATC-59, "
FUNCTION CONFIRMA-
TION PROCEDURE", see No. 5 to 7.
*4ATC-109, "
Ambient Sensor Circuit".*5AT C - 111 , "In-Vehicle Sensor Circuit".*6ATC-114, "Sunload Sensor Circuit".
*7AT C - 11 7 , "
Intake Sensor Circuit".*8AT C - 7 8 , "DIAGNOSTIC PROCE-
DURE FOR AIR MIX DOOR
MOTOR".*9ATC-34, "
SYMPTOM TABLE".
*10AT C - 5 9 , "
FUNCTION CONFIRMA-
TION PROCEDURE", see No. 9.*11AT C - 6 9 , "
LAN System Circuit".*12ATC-135, "AIR MIX DOOR
MOTOR".
RJIA3097E

TROUBLE DIAGNOSIS
ATC-77
C
D
E
F
G
H
I
K
L
MA
B
AT C

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 amp. receives data from each of the sensors. The auto 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 auto amp. and each of the motor position
sensors are compared by the LCUs in each motor with the existing decision and opening angles. Subse-
quently, HOT/COLD or DEF/VENT or FRESH/RECIRCULATION operation is selected. The new selection
data is returned to the auto amp.
Air Mix Door Control Specification
RHA424GB
RHA457H

ATC-78
TROUBLE DIAGNOSIS

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 amp. The air mix door position is fed back to the auto
amp. 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. Refer to AT C - 6 9 , "
DIAGNOSTIC PROCEDURE FOR LAN CIRCUIT" .
RJIA0516E
RJIA0517E

TROUBLE DIAGNOSIS
ATC-79
C
D
E
F
G
H
I
K
L
MA
B
AT C

Intake Door Motor CircuitEJS004YM
SYMPTOM:

Intake door does not change.

Intake door motor does not operate normally.
INSPECTION FLOW
*1ATC-65, "Operational Check".*2ATC-59, "FUNCTION CONFIRMA-
TION PROCEDURE", see No. 1.*3AT C - 5 9 , "
FUNCTION CONFIRMA-
TION PROCEDURE", see No.5 to
7.
*4ATC-109, "
Ambient Sensor Circuit".*5AT C - 111 , "In-Vehicle Sensor Circuit".*6AT C - 11 4 , "Sunload Sensor Circuit".
*7ATC-117, "
Intake Sensor Circuit".*8ATC-76, "Air Mix Door Motor Circuit".*9AT C - 3 4 , "SYMPTOM TABLE".
*10ATC-59, "
FUNCTION CONFIRMA-
TION PROCEDURE", see No. 9.*11ATC-69, "
LAN System Circuit".*12ATC-128, "INTAKE DOOR
MOTOR".
RJIA3099E

ATC-80
TROUBLE DIAGNOSIS

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 intake door control determines intake door position based on the ambient temperature, the intake air tem-
perature and the in-vehicle temperature. When set mode control dial to D/F, D/F2 or DEF position, or OFF
position, the auto amp. sets the intake door at the FRESH position.
Intake Door Control Specification
RJIA2831E
RHA383H

TROUBLE DIAGNOSIS
ATC-81
C
D
E
F
G
H
I
K
L
MA
B
AT C

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 amp. Motor rotation is con-
veyed to a lever which activates the intake door.
DIAGNOSTIC PROCEDURE FOR INTAKE DOOR MOTOR
SYMPTOM: Intake door motor does not operate normally.
Perform diagnostic procedure. Refer to AT C - 6 9 , "
DIAGNOSTIC PROCEDURE FOR LAN CIRCUIT" .
RJIA0519E
RJIA0520E

ATC-82
TROUBLE DIAGNOSIS

Blower Motor CircuitEJS004YN
SYMPTOM:

Blower motor operation is malfunctioning.

Blower motor operation is malfunctioning under out of starting fan speed control.
INSPECTION FLOW
*1ATC-65, "Operational Check".*2ATC-59, "FUNCTION CONFIRMA-
TION PROCEDURE", see No. 1.*3ATC-59, "
FUNCTION CONFIRMA-
TION PROCEDURE", see No. 5.
*4ATC-59, "
FUNCTION CONFIRMA-
TION PROCEDURE", see No. 7.*5ATC-109, "
Ambient Sensor Circuit".*6AT C - 111 , "In-Vehicle Sensor Circuit".
RJIA3101E