Infiniti Q45. Manual — part 120
TROUBLE DIAGNOSIS
ATC-75
C
D
E
F
G
H
I
K
L
M
A
B
ATC
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. Motor rotation is then conveyed through a shaft
and the air mix door position feedback is then sent to the auto amp.
by PBR built-in air mix door motor.
DIAGNOSIS PROCEDURE FOR AIR MIX DOOR MOTOR
SYMPTOM: Discharge air temperature does not change.
Perform diagnosis procedure. Refer to
ATC-66, "DIAGNOSIS PROCEDURE FOR LAN CIRCUIT"
.
Air Mix Door Motor PBR Circuit
NJS0008H
SYMPTOM: If PBR circuit is open or shorted. (26/
−
26 or 27/
−
27 is indicated on auto amp. as a result of con-
ducting self-diagnosis STEP-2.)
DIAGNOSIS PROCEDURE FOR AIR MIX DOOR MOTOR PBR
Perform diagnosis procedure. Refer to
ATC-66, "DIAGNOSIS PROCEDURE FOR LAN CIRCUIT"
.
RJIA0287E
RJIA0288E
ATC-76
TROUBLE DIAGNOSIS
Intake Door Motor Circuit
NJS0008I
SYMPTOM:
●
Intake door does not change.
●
Intake door motor does not operate normally.
INSPECTION FLOW
*1
ATC-54, "FUNCTION CONFIRMA-
TION PROCEDURE"
, see No. 1.
*2
ATC-110, "Ambient Sensor Circuit"
*3
ATC-112, "In-Vehicle Sensor Cir-
cuit"
*4
ATC-115, "Sunload Sensor Circuit"
*5
ATC-75, "Air Mix Door Motor PBR
Circuit"
*6
ATC-54, "FUNCTION CONFIRMA-
TION PROCEDURE"
, see No. 14.
*7
*8
*9
*10
ATC-54, "FUNCTION CONFIRMA-
TION PROCEDURE"
, see No. 5 to 7.
*11
*12
ATC-118, "Intake Sensor Circuit"
SJIA1305E
TROUBLE DIAGNOSIS
ATC-77
C
D
E
F
G
H
I
K
L
M
A
B
ATC
SYSTEM DESCRIPTION
Component Parts
Intake door control system components are:
●
Auto amp.
●
Intake door motor
●
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 ECON, DEF and OFF switches are pressed, the auto amp.
sets the intake door at the FRESH position.
Intake Door Control Specification
RJIA1291E
RHA383H
ATC-78
TROUBLE DIAGNOSIS
COMPONENT DESCRIPTION
Intake Door Motor
The intake door motor is attached to the blower 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.
DIAGNOSIS PROCEDURE FOR INTAKE DOOR MOTOR
SYMPTOM: Intake door motor does not operate normally.
Perform diagnosis procedure. Refer to
ATC-66, "DIAGNOSIS PROCEDURE FOR LAN CIRCUIT"
.
RJIA0280E
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