Subaru Legacy III (2000-2003 year). Service manual — part 853
2003 LEGACY SERVICE MANUAL
QUICK REFERENCE INDEX
BODY SECTION
G2300GE7
HVAC SYSTEM (HEATER, VENTILATOR
AND A/C)
AC
Page
General Description . . . . . . . . . . . . . . . . . . . . . 2
Refrigerant Pressure with Manifold Gauge Set. . . . . . . . . . .22
Refrigerant Recovery Procedure. . . . . . . . . . . . . . . ...23
Refrigerant Charging Procedure . . . . . . . . . . . . . . . ...24
Refrigerant Leak Check . . . . . . . . . . . . . . . . . . . 27
Compressor Oil . . . . . . . . . . . . . . . . . . . . . . .29
Heater Unit . . . . . . . . . . . . . . . . . . . . . . . . 30
Blower Motor Assembly . . . . . . . . . . . . . . . . . . . 31
Heater Blower Resistor . . . . . . . . . . . . . . . . . . . .32
Heater Core. . . . . . . . . . . . . . . . . . . . . . . ...33
Control Unit . . . . . . . . . . . . . . . . . . . . . . . ...34
Compressor. . . . . . . . . . . . . . . . . . . . . . . ...35
Condenser. . . . . . . . . . . . . . . . . . . . . . . . .37
Receiver Drier . . . . . . . . . . . . . . . . . . . . . . ...39
Intake Unit . . . . . . . . . . . . . . . . . . . . . . . . .40
Flexible Hose . . . . . . . . . . . . . . . . . . . . . . . 42
Relay and Fuse . . . . . . . . . . . . . . . . . . . . . . .43
Pressure Switch (Dual Switch) . . . . . . . . . . . . . . . . ..45
Pressure Switch (Triple Switch) . . . . . . . . . . . . . . . . 46
Ambient Sensor (Auto A/C) . . . . . . . . . . . . . . . . . ...47
Sunload Sensor (Auto A/C) . . . . . . . . . . . . . . . . . ...48
Air Vent Grille . . . . . . . . . . . . . . . . . . . . . . . 49
Heater Duct . . . . . . . . . . . . . . . . . . . . . . . ...50
Heater Vent Duct. . . . . . . . . . . . . . . . . . . . . ...51
General Diagnostics . . . . . . . . . . . . . . . . . . . . ..52
AC-2
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
GENERAL DESCRIPTION
1. General Description
A: SPECIFICATIONS
1. HEATER SYSTEM
Item
Specifications
Condition
Heating capacity
LHD model
5.0 kW (4,300 kcal/h, 17,062 BTU/
h) or more
• Mode selector switch: HEAT
• Temperature control switch: FULL HOT
• Temperature difference between hot water
and inlet air: 65
°
C (149
°
F)
• Hot water flow rate: 360
2
(95.1 US gal,
79.2 Imp gal)/h
RHD model
5.58 kW (4,800 kcal/h, 19,046
BTU/h) or more
Air flow rate
LHD model
300 m
3
(10,593 cu ft)/h
Heat mode (FRESH), FULL HOT at 12.5 V
RHD model
300 m
3
(10,593 cu ft)/h
Max air flow rate
LHD model
500 m
3
(17,655 cu ft)/h
• Temperature control switch: FULL COLD
• Blower fan speed: 4th position
• Mode selector lever: RECIRC
RHD model
480 m
3
(16,949 cu ft)/h
Heater core size
(height
×
length
×
width)
LHD model
193.5
×
152
×
35.0 mm
(7.62
×
5.98
×
1.378 in)
—
RHD model
181.5
×
160
×
27 mm
(7.15
×
6.30
×
1.06 in)
Blower
motor
Type
LHD model
Magnet motor 230 W or less
at 12 V
RHD model
Magnet motor 220 W or less
Fan type and size
(diameter
×
width)
LHD model
Sirocco fan type
150
×
75 mm (5.91
×
2.95 in)
—
RHD model
Sirocco fan type
150
×
75 mm (5.91
×
2.95 in)
AC-3
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
GENERAL DESCRIPTION
2. A/C SYSTEM (4 CYLINDER)
• LHD Model
Item
Specifications
Type of air conditioner
Reheat air-mix type
Cooling capacity
5.2 kW
(4,471 kcal/h, 17,741 BTU/h)
Refrigerant
HFC-134a (CH
2
FCF
3
)
[0.65
±
0.05 kg (1.43
±
0.11 lb)]
Compressor
Type
5-vane rotary, fix volume (DKV-14G)
Discharge
140 cm
3
(8.54 cu in)/rev
Max. permissible speed
7,000 rpm
Magnet clutch
Type
Dry, single-disc type
Power consumption
38 W
Type of belt
V-Ribbed 4 PK
Pulley dia. (effective dia.)
125 mm (4.92 in)
Pulley ratio
1.064
Condenser
Type
Corrugated fin (Multi-flow)
Core face area
0.22 m
2
(2.37 sq ft)
Core thickness
21 mm (0.83 in)
Radiation area
6.52 m
2
(70 sq ft)
Receiver drier
Effective inner capacity
250 cm
3
(15.26 cu in)
Expansion valve
Type
External equalizing
Evaporator
Type
Single tank
Dimensions (W
×
H
×
T)
235
×
224
×
60 mm
(9.25
×
8.82
×
2.36 in)
Blower fan
Fan type
Sirocco fan
Outer diameter
×
width
150
×
75 mm (5.91
×
2.95 in)
Power consumption
230 W at 12 V
Condenser fan (Sub fan)
Motor type
Magnet
Power consumption
75 W at 12 V
Fan outer diameter
300 mm (11.81 in)
Radiator fan (Main fan)
Motor type
Magnet
Power consumption
75 W at 12 V
Fan outer diameter
300 mm (11.81 in)
Idling speed (A/C ON)
MPFI model
850
±
100 rpm
Dual switch
(Pressure
switch)
Low-pressure
switch operat-
ing pressure
ON
→
OFF
177
±
25 kPa
(1.80
±
0.25 kg/cm
2
, 25.6
±
3.6 psi)
OFF
→
ON
216
+39
/
−
25
kPa
(2.2
+0.4
/
−
0.25
kg/cm
2
, 31
+5.7
/
−
3.6
psi)
High-pres-
sure switch
operating
pressure
ON
→
OFF
2,942
±
196 kPa
(30
±
2 kg/cm
2
, 427
±
28 psi)
DIFF
588
±
196 kPa
(6
±
2 kg/cm
2
, 85
±
28 psi)
Thermo control amplifier
working temperature
(Evaporator outlet air)
(1) 1.5±0.5
°
C (35±0.9
°
F)
(2) 3.0±0.3
°
C (37±0.5
°
F)
(3) Repeat
AC-00459
( 1 )
( 2 )
( 3 )
OFF
ON
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