Infiniti QX4 (R50). Manual — part 472
10. Check that water cock operates properly when changing from
code No.
to
by pushing DEF switch. (After several
cycles, water cock lever should be midpoint of plate opening
when code No.
is set.)
TROUBLE DIAGNOSES
Air Mix Door Motor (Cont’d)
HA-86
Intake Door Motor
TROUBLE DIAGNOSIS PROCEDURE FOR INTAKE DOOR
=NBHA0092
SYMPTOM:
I
Intake door does not change.
I
Intake door motor does not operate normally.
Inspection Flow
NBHA0092S01
Without Navigation System
NBHA0092S0101
SHA247F
*1: HA-44
*2: HA-129
*3: HA-132
*4: HA-135
*5: HA-141
*6: STEP-BY-STEP PROCEDURE
(HA-45), see No. 13.
*10: HA-45
*11: HA-66
*12: HA-65
*13: HA-139
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Intake Door Motor
HA-87
With Navigation System
NBHA0092S0102
RHA873H
*1: HA-44
*2: HA-129
*3: HA-132
*4: HA-135
*5: HA-141
*6: STEP-BY-STEP PROCEDURE
(HA-45), see No. 13.
*10: HA-45
*11: HA-66
*12: HA-65
*13: HA-139
TROUBLE DIAGNOSES
Intake Door Motor (Cont’d)
HA-88
SYSTEM DESCRIPTION
=NBHA0056
Component Parts
NBHA0056S01
Intake door control system components are:
1) Auto amp.
2) Intake door motor
3) A/C LAN system (PBR built-in mode motor and air mix door motor)
4) In-vehicle sensor
5) Ambient sensor
6) Sunload sensor
7) Intake sensor
System Operation
NBHA0056S02
The intake door control determines intake door position based on the ambient temperature, the intake air
temperature and the in-vehicle temperature. When the ECON, DEFROST, or OFF switches are pushed, the
auto amplifier sets the intake door at the “Fresh” position.
RHA874H
Intake Door Control Specification
NBHA0056S03
RHA136G
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
SC
EL
IDX
TROUBLE DIAGNOSES
Intake Door Motor (Cont’d)
HA-89
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