Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan 300ZX 1984-1985,1988,1990,1994-1996 Approved 1988 Heater & AC
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I AIR CONDITIONER
SECTION HA
CONTENTS
GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HA- 2
AIR FLOW AND COMPONENT LAYOUT (Manual) ........................... HA- 3
LOCATION OF VACUUM COMPONENTS (Manual) ........................... HA- 5
CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HA- 6
HEATER ELECTRICAL CIRCUIT .......................................... HA- 7
DESCRIPTION . Conditioner (Manual) ....................................
Air HA- 9
DISCHARGING. EVACUATING. CHARGING AND CHECKING . . . . . . . . . . . . . . . . . HA- 10
A/C PERFORMANCE TEST (Manual) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HA- 16
PRECAUTIONS FOR REFRIGERANT CONNECTION .......................... HA- 18
PIPING. COMPRESSOR MOUNTING AND F.1.C.D ............................. HA- 19
COMPRESSOR O I L - ForMJS170 .......................................... HA- 21
COMPRESSOR -Model MJS170 ............................................ HA- 23
A/C ELECTRICAL CIRCUIT (Manual) ...................................... HA- 28
A/C ELECTRICAL COMPONENTS (Manual) .................................. HA- 30
LOCATION OF A/C ELECTRICAL COMPONENTS (Manual) .................... HA- 32
TROUBLE DIAGNOSES (Manual) .......................................... HA- 33
DESCRIPTION - A i r Conditioner (Auto) ...................................... HA- 65
AIR FLOW AND COMPONENT LAYOUT (Auto) ............................. HA- 85
LOCATION OF VACUUM COMPONENTS (Auto) ............................. HA- 87
A/C PERFORMANCE TEST (Auto) ......................................... HA- 88
A/C PERFORMANCE TEST (Auto)/PIPING (Auto) ............................ HA- 89
A/C ELECTRICAL CIRCUIT (Auto) ........................................ HA- 90
A/C ELECTRICAL COMPONENTS (Auto) ................................... HA- 94
LOCATION OF A/C ELECTRICAL COMPONENTS (Auto) ..................... HA- 95
SELF-DIAGNOSING SYSTEM OF TROUBLE (Auto) .......................... HA- 98
TROUBLE DIAGNOSES (Auto) ............................................ HA-102
SERVICE DATA AND SPECIFICATIONS (S.D.S.) ............................. HA-131
SPECIAL SERVICE TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ~A-134
GENERAL DESCRIPTION
Continuously Variable -Device for Distributing Cool Air -
Air Flow Control to the Feet during "FACE MODE"
The Tan control amplifier, which utilizes transistor A vacuum actuator is used in the cool-air distribu-
circuits, continuouslv controls the air flow blown tion device to remove the hot air directed to the
out by the blower, allowing for selection of the de- floor area and distribute the optimum air tempera-
sired air flowrate. The fan control amplifier is ture to the driver's compartment. When the vac-
housed in the blower motor unit. The heat-radiat- uum switch is turned "ON", part of the outside air
ing plate o f the amplifier is placed in the stream of (or: part of the cool air on models equipped with
the air flow t o effectively cool the transistors. air conditioning systems) taken in the vehicle is
bypassed to the shower duct on the driver's side
*
--
To blower relay
-.
Tp control unit
-.-- 7
-. . -
BLOWER MOTOR
through the operation of the actuator.
F i v e r a y center dun
7
1 rVemilator bypas duct
Vacuum switch
F A N CONTROL AMPLIFIER (Floor ventilator Open-Close1
SHP.2556 L(Driver-side)
o w e r t y pe
-JI-J(y
I1 Vacuum hose
SHA230B
HA-2
AIR FLOW AND COMPONENT LAYOUT (Manual)
Air Flow
I
SHA231B
HA-3
AIR FLOW AND COMPONENT LAYOUT (Manual)
Component Layout
SHA7908
HA-4
LOCATION OF VACUUM COMPONENTS (Manual)
Intake actuator Actuator lFor defroster door 11
With vacuum actuator1
Vacuum w i t c h
(For floor mntilator)
Front side
\Vacuum tank
Vacuum pump motorJ M SH A980 B
HA-5
CONTROL
Heater and Air Conditioner Control Removal
: Heater and air conditioner control assembly mounting bolts
HA-6
HEATER ELECTRICAL CIRCUIT
Schematic
BATTERY FUSIBLE
LINK
POTENT10
BALANCE
RESISTOR
SETTING
POTENT10
k
z
3
J
I A
k
z ZZL
8 aos
U O 4
FUSE
I
FAN
I RHEOSTAT
For ventilator
LIGHTING SWITCH
SHA4178
HA-7
HEATER ELECTRICAL CIRCUIT
Wiring Diagram
1: L-
r
-
I
:--
as
SU SHA990B
HA-8
DESCRIPTION-Air Conditioner (Manual)
Refrigeration Cycle
REFRIGERANT FLOW
The refrigerant flows in the standard pattern, that is, through the compressor, the condenser, the receiver
drier, through the evaporator, and back to the compressor.
The refrigerant evaporation through the evaporator coil is controlled by an externally equalized expansion
valve, located inside the evaporator case.
FREEZE PROTECTION - Compressor control
The compressor cycles on and off t o maintain the evaporator temperature within a specified range. When
the evaporator coil temperature falls below a specified point, the thermo control amplifier interrupts the
compressor operation. When the evaporator coil temperature rises above the specification, the thermo con-
trol amplifier allows compressor operation.
The refrigerant system is protected against excessively high pressure by a pressure relief valve located
between the receiver drier and the condenser. Protection against excessively low pressure (interruption of
compressor operation) i s provided by a low pressure switch, located on the receiver drier.
Condenser
Safety valve
refriawant to
~~
atmosphere at pressures
h o w apwox. 3,727 kPa Blower motor
138 kglcm', 540 psi).
The MIH Cannot be reumd.
Delivers sprayed refrigerant to the
Turns OFF at pressure below evawrator to facilitate refrigerant
196 kPa (2 ke/cm',28 poi) evaporation and controls the amount
ow-preoure witch cutting compressor wwr supply. of refriwrant passing the orifics. SHA926B
HA-9
DISCHARGING, EVACUATING, CHARGING AND CHECKING
Precautions Discharging
WARNING: Slowly open the valves to discharge only refriger-
0 Always be careful t h a t refrigerant does not ant. I f they are opened quickly, compressor oil will
come in contact with your skin. also be discharged.
0 Always wear eye protection when working To high-pressure
service v d v e
around the system.
0 Keep refrigerant containers stored below 50◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo