2001 INFINITI QX4 Factory Service Manual

Page 1817 of 2395

INFINITI QX4 2001  Factory Service Manual 3. Capacity Control=NBHA0087S0203IRefrigerant pressure on suction side is low during high speed driving or when ambient or interior tempera-
ture is low.
IThe bellows expands when refrigerant pressure

Page 1818 of 2395

INFINITI QX4 2001  Factory Service Manual Component LayoutNBHA0012
RHA451G
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
SC
EL
IDX
DESCRIPTION
Component Layout
HA-19

Page 1819 of 2395

INFINITI QX4 2001  Factory Service Manual IntroductionNBHA0013AIR CONDITIONER LAN SYSTEM OVERVIEW CONTROL SYSTEMNBHA0013S01The LAN system consists of auto amp., air mix door motor and mode door motor.
A configuration of these components is sh

Page 1820 of 2395

INFINITI QX4 2001  Factory Service Manual RHA441GA
Transmission Data and Transmission OrderNBHA0014S0802Amplifier data is transmitted consecutively to each of the door motors following the form shown in figure below.
Start: Initial compulsory

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INFINITI QX4 2001  Factory Service Manual Fan Speed ControlNBHA0014S0804Blower speed is automatically controlled based on temperature setting, ambient temperature, in-vehicle
temperature, intake temperature, amount of sunload and air mix door

Page 1822 of 2395

INFINITI QX4 2001  Factory Service Manual Overview of Control System=NBHA0015The control system consists of input sensors, switches, the automatic amplifier (microcomputer) and outputs.
The relationship of these components is shown in the dia

Page 1823 of 2395

INFINITI QX4 2001  Factory Service Manual RHA328HA
DISPLAY SCREENNBHA0016S01Displays the operational status of the system.
AUTO SWITCHNBHA0016S02The compressor, intake doors, air mix door, outlet doors, and blower speed are automatically cont

Page 1824 of 2395

INFINITI QX4 2001  Factory Service Manual Discharge Air FlowNBHA0017
RHA043G
GI
MA
EM
LC
EC
FE
AT
TF
PD
AX
SU
BR
ST
RS
BT
SC
EL
IDX
DESCRIPTION
Discharge Air Flow
HA-25