Nissan Murano. Manual — part 792
HA-4
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORK FLOW
>> GO TO 3.
3.
CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III
Using CONSULT, perform “SELF-DIAGNOSIS RESULTS” of HVAC. Refer to
(WITH-
OUT 7 INCH DISPLAY) or
(WITH 7 INCH DISPLAY).
Are self-diagnosis results normal?
YES
>> GO TO 4.
NO
>> GO TO 5.
4.
NARROW DOWN THE MALFUNCTIONING PARTS BY SYMPTOM DIAGNOSIS
Perform symptom diagnosis and narrow down the malfunctioning parts. Refer to
(WITHOUT 7 INCH DISPLAY) or
HAC-232, "Diagnosis Chart By Symptom"
(WITH 7 INCH DIS-
PLAY).
>> GO TO 5.
5.
REPAIR OR REPLACE
Repair or replace malfunctioning parts.
NOTE:
If DTC is displayed, erase DTC after repairing or replacing malfunctioning parts.
>> GO TO 6.
6.
FINAL CHECK
Check that the A/C system operates normally.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 3.
REFRIGERATION SYSTEM
HA-5
< SYSTEM DESCRIPTION >
C
D
E
F
G
H
J
K
L
M
A
B
HA
N
O
P
SYSTEM DESCRIPTION
REFRIGERATION SYSTEM
System Diagram
INFOID:0000000009718609
System Description
INFOID:0000000009718610
REFRIGERANT CYCLE
Refrigerant Flow
The refrigerant flows from the compressor, through the condenser with a liquid tank, through the evaporator,
and then back to the compressor. The refrigerant evaporation in the evaporator is controlled by an externally
equalized expansion valve, located at dash panels.
Freeze Protection
To prevent the evaporator from freezing up, the evaporator air temperature is monitored, and the voltage sig-
nal to the A/C auto amp. turns the A/C relay OFF and stops the compressor.
REFRIGERANT SYSTEM PROTECTION
Refrigerant Pressure Sensor
The refrigerant system is protected against excessively high or low-pressures by the refrigerant pressure sen-
sor, located on the liquid tank. The refrigerant pressure sensor detects the pressure inside the refrigerant line
and sends the voltage signal to the ECM if the system pressure rises above, or falls below the specifications.
ECM turns the A/C relay OFF and stops the compressor when pressure on the high-pressure side detected by
the refrigerant pressure sensor is over approximately 3,119 kPa (31.8 kg/cm
2
, 452 psi) or below approximately
118 kPa (1.2 kg/cm
2
, 17 psi).
Pressure Relief Valve
The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compressor.
The release port on the pressure relief valve automatically opens and releases refrigerant into the atmosphere
when the pressure of the refrigerant in the system increases to an unusual level [more than 3,600 kPa (36.7
kg/cm
2
, 522 psi)].
RJIA1552E
HA-6
< SYSTEM DESCRIPTION >
REFRIGERATION SYSTEM
Component Parts Location
INFOID:0000000009718611
1.
Compressor
2.
Condenser
3.
Liquid tank
4.
Refrigerant pressure sensor
JPIIA0550ZZ
REFRIGERATION SYSTEM
HA-7
< SYSTEM DESCRIPTION >
C
D
E
F
G
H
J
K
L
M
A
B
HA
N
O
P
Component Description
INFOID:0000000009718612
1.
Evaporator
2.
Expansion valve
3.
Blower motor
JPIIA0551ZZ
Component
Description
Compressor
Intakes, compresses, and discharges refrigerant, to circulate refrigerant inside the refrigerant cycle.
Condenser
Cools refrigerant discharged from compressor, and transforms it to liquid refrigerant.
Liquid tank
Eliminates foreign material in refrigerant, and temporarily stores liquid refrigerant.
Refrigerant pressure sensor
Refer to
(WITHOUT 7 INCH DISPLAY) or
(WITH 7
INCH DISPLAY).
Evaporator
The mist form liquid refrigerant transforms to gas through evaporation by the air conveyed from the
blower motor. The air is cooled by the heat from evaporation.
Expansion valve
Transforms high-pressure liquid refrigerant to mist form from low-pressure liquid refrigerant by the
drawing function.
Blower motor
Takes in air from the vehicle or fresh outside air, provides it forcedly pushes it into to the air condi-
tioner, and circulates it inside the vehicle.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст