2003 NISSAN X-TRAIL Electronic Repair Manual

Page 641 of 3066

NISSAN X-TRAIL 2003  Electronic Repair Manual TROUBLE DIAGNOSIS
ATC-63
C
D
E
F
G
H
I
K
L
MA
B
AT C
lIn-vehicle sensor
lAmbient sensor
lSunload sensor
lIntake sensor
System Operation
The auto amplifier receives data from each of the sensors. The a

Page 642 of 3066

NISSAN X-TRAIL 2003  Electronic Repair Manual ATC-64
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

Page 643 of 3066

NISSAN X-TRAIL 2003  Electronic Repair Manual TROUBLE DIAGNOSIS
ATC-65
C
D
E
F
G
H
I
K
L
MA
B
AT C
INSPECTION FLOW
SYSTEM DESCRIPTION
Component Parts
Intake door control system components are:
lAuto amp.
lIntake door motor (LCU)
*1 Self-diagnosis

Page 644 of 3066

NISSAN X-TRAIL 2003  Electronic Repair Manual ATC-66
TROUBLE DIAGNOSIS
lA/C LAN system (PBR built-in air mix door motor, mode door motor and intake door motor)
lIn-vehicle sensor
lAmbient sensor
lSunload sensor
lIntake sensor
System Operation
The

Page 645 of 3066

NISSAN X-TRAIL 2003  Electronic Repair Manual TROUBLE DIAGNOSIS
ATC-67
C
D
E
F
G
H
I
K
L
MA
B
AT C
DIAGNOSTIC PROCEDURE
SYMPTOM: Intake door motor does not operate normally.
Perform diagnostic procedure for LAN system circuit. Refer toAT C - 5 6

Page 646 of 3066

NISSAN X-TRAIL 2003  Electronic Repair Manual ATC-68
TROUBLE DIAGNOSIS
INSPECTION FLOW
*1 Self-diagnosisAT C -4 2*2 Ambient sensor circuitAT C - 9 3*3 In-vehicle sensor circuitAT C - 9 5
*4 Sunload sensor circuitAT C - 9 8*5 Air mix door motor ci

Page 647 of 3066

NISSAN X-TRAIL 2003  Electronic Repair Manual TROUBLE DIAGNOSIS
ATC-69
C
D
E
F
G
H
I
K
L
MA
B
AT C
SYSTEM DESCRIPTION
Component Parts
Fan speed control system components are:
lAuto amp.
lA/C LAN system (PBR built-in air mix door motor, mode door

Page 648 of 3066

NISSAN X-TRAIL 2003  Electronic Repair Manual ATC-70
TROUBLE DIAGNOSIS
When the in-vehicle temperature and the set temperature are very close, the blower will be operating at low
speed. The low speed will vary depending on the sunload. During con