Subaru Legacy III (2000-2003 year). Service manual — part 853

2003 LEGACY SERVICE MANUAL

QUICK REFERENCE INDEX

BODY SECTION

G2300GE7

CRUISE CONTROL SYSTEM

CC

CRUISE CONTROL SYSTEM
(DIAGNOSTICS)

CC

IMMOBILIZER (DIAGNOSTICS)

IM

HVAC SYSTEM (HEATER, VENTILATOR
AND A/C)

AC

Page

1.

General Description . . . . . . . . . . . . . . . . . . . . . 2

2.

Refrigerant Pressure with Manifold Gauge Set. . . . . . . . . . .22

3.

Refrigerant Recovery Procedure. . . . . . . . . . . . . . . ...23

4.

Refrigerant Charging Procedure . . . . . . . . . . . . . . . ...24

5.

Refrigerant Leak Check . . . . . . . . . . . . . . . . . . . 27

6.

Compressor Oil . . . . . . . . . . . . . . . . . . . . . . .29

7.

Heater Unit . . . . . . . . . . . . . . . . . . . . . . . . 30

8.

Blower Motor Assembly . . . . . . . . . . . . . . . . . . . 31

9.

Heater Blower Resistor . . . . . . . . . . . . . . . . . . . .32

10.

Heater Core. . . . . . . . . . . . . . . . . . . . . . . ...33

11.

Control Unit . . . . . . . . . . . . . . . . . . . . . . . ...34

12.

Compressor. . . . . . . . . . . . . . . . . . . . . . . ...35

13.

Condenser. . . . . . . . . . . . . . . . . . . . . . . . .37

14.

Receiver Drier . . . . . . . . . . . . . . . . . . . . . . ...39

15.

Intake Unit . . . . . . . . . . . . . . . . . . . . . . . . .40

16.

Flexible Hose . . . . . . . . . . . . . . . . . . . . . . . 42

17.

Relay and Fuse . . . . . . . . . . . . . . . . . . . . . . .43

18.

Pressure Switch (Dual Switch) . . . . . . . . . . . . . . . . ..45

19.

Pressure Switch (Triple Switch) . . . . . . . . . . . . . . . . 46

20.

Ambient Sensor (Auto A/C) . . . . . . . . . . . . . . . . . ...47

21.

Sunload Sensor (Auto A/C) . . . . . . . . . . . . . . . . . ...48

22.

Air Vent Grille . . . . . . . . . . . . . . . . . . . . . . . 49

23.

Heater Duct . . . . . . . . . . . . . . . . . . . . . . . ...50

24.

Heater Vent Duct. . . . . . . . . . . . . . . . . . . . . ...51

25.

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