SUBARU LEGACY 1997 Service Repair Manual

B4M0061A
2. CONTROL UNIT
Check circuit continuity between each terminal, when push
control switch is turned ON.
Terminal
No.Mode selector switch RECIRC switch
A/C
switchIllumi.
VENT BI-LEV HEATDEF/
HEATDEF RECIRC FRESH
1
2
3
4
5
6
7
8
9
10
11
12

13
14
15
16
17
18
19
B4M0062A
C: ADJUSTMENT
1) Operate temperature control lever to“FULL COLD”
position.
2) Install control cable to lever
1. While pushing outer
cable, secure control cable with clip
2.
D: INSTALLATION
Installation is in the reverse order of removal.
NOTE:
Before control unit installation, set temperature control
lever to“FULL COLD”position.
10
4-6SERVICE PROCEDURE
4. Control Unit

B5M0025
5. Intake Door Motor
A: REMOVAL
1) Disconnect GND cable from battery.
2) Remove glove box and pocket back panel. <Ref. to 5-4
[W1A0].>
3) Remove heater duct or evaporator. (With A/C model).
<Ref. to 4-7 [W14A0].>
G4M0561
4) Remove intake unit from the vehicle.
B4M1428A
5) Remove screws which secure intake door motor to
intake unit.
NOTE:
Ensure that RECIRC switch is set to“ON”.
B4M1429A
11
4-6SERVICE PROCEDURE
5. Intake Door Motor

B4M0294A
B: INSPECTION
1) When approx. 12 V is applied to the intake door motor
terminals, intake door motor operates as follows:
Intake
door motor
positionTerminal
Intake door motor operation


FRESH
3*
2**2*
1**Door motor moved to FRESH position.
RECIRC1*
3**Door motor moved to RECIRC position.
*: LHD model
**: RHD model
B4M1430A
B4M1431A
2) Connect harness to intake door motor.
3) Turn ignition switch to“ACC”and RECIRC switch to
“ON”then, set to“RECIRC”.
NOTE:
Ensure that intake door motor is set in the“RECIRC”mode.
4) Install intake door motor on intake unit.
5) Secure rod holder to link, and install link to intake unit.
6) Manually set rod in the“RECIRC”mode, and secure to
rod holder.
7) Operate mode selector switch to ensure that system
changes from intake air to“RECIRC”and from“RECIRC”
to intake air in full-stroke range.
C: INSTALLATION
Installation is in the reverse order of removal.
12
4-6SERVICE PROCEDURE
5. Intake Door Motor

B4M0063
6. Mode Door Motor
A: REMOVAL
1) Remove instrument panel. <Ref. to 5-4 [W1A0].>
2) Remove mode door motor.
B4M0064A
B: INSPECTION
1) When approx. 12 V is applied to the mode door motor
terminals, mode door motor operates as follows:
Terminal No.
Mode door motor
21
Polarity of power supply
terminalsMode door motor
operationDirection of linkage
rotation
+ VENT,DEF Clockwise
+ DEF,VENT Counterclockwise
2) Check mode door motor position switch.
When the mode door motor is moved to each mode posi-
tion by using the mode selector switch, check if continuity
exists between each terminal as follows:
Mode selector switch
positionsTerminal No.
VENT 8 or 7
9 (GND) BI-LEV 6 or 7
HEAT 5or6
DEF/HEAT 4 or 5
DEF 3or4
C: INSTALLATION
Installation is in the reverse order of removal.
13
4-6SERVICE PROCEDURE
6. Mode Door Motor

1. Air Conditioning System
A: SPECIFICATIONS
Item Specifications
Type of air conditionerReheat air-mix type
Cooling capacity (IMACA)4.885 kW
(4,200 kcal/h, 16,666 BTU/h)
RefrigerantHFC-134a (CH
2FCF3)
[0.55 — 0.65 kg
(1.21 — 1.43 lb)]
CompressorType 5-vane rotary, fix volume (DKV-14D)
Discharge 140 cm
3(8.54 cu in)/rev
Max. permissible speed 7,000 rpm
Magnet clutchTy p eDry, single-disc type
Power consumption 45 W
Type of belt V-Ribbed 4 PK
Pulley dia. (effective dia.) 125 mm (4.92 in)
Pulley ratio1.064
CondenserType Corrugated fin (Multi-flow)
Core face area 0.215 m
2(2.31 sq ft)
Core thickness 19 mm (0.75 in)
Radiation area 4.7 m
2(51 sq ft)
Receiver drier Effective inner capacity 290 cm3(17.70 cu in)
Expansion valve TypeInternal equalizing
EvaporatorTy p eA
-laminate
Dimensions (W x H x T)74 x 224 x 235 mm
(2.91 x 8.82 x 9.25 in)
Blower fanFan typeSirocco fan
Outer diameter x width 150 x 75 mm (5.91 x 2.95 in)
Power consumption 230 W at 12 V
Condenser fan
(Sub fan)Motor typeMagnet
Power consumption 120 W at 12 V
Fan outer diameter 320 mm (12.60 in)
Radiator fan
(Main fan)Motor typeMagnet
Power consumption 120 W at 12 V
Fan outer diameter 320 mm (12.60 in)
Idling speed with
F.I.C.D. in operationMPFI model 850±100 rpm (700±100 rpm “D” range in AT model)
Dual switch
(Pressure switch)
High-pressure line
B4M0755A
Compressor relief valve
blow-out pressure
B4M0084A
Thermo control
amplifier working
temperature
(Evaporator outlet air)
B4M0756A
2
4-7SPECIFICATIONS
1. Air Conditioning System

1. Air Conditioning System
1. LHD MODEL
B4M0757A

1Receiver drier bracket


2Pipe (Receiver drier—Evaporator module)


3Receiver drier


4Evaporator unit


5Hose (Low-pressure)


6A/C relay


7Fuse


8Hose (High-pressure)


9Compressor


10Condenser


11Pipe (Condenser—Receiver drier)
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 7.4±2.0 (0.75±0.2, 5.4±1.4)
T3: 15±5 (1.5±0.5, 10.8±3.6)
T3: 15±3 (1.5±0.3, 10.8±2.2)
T4: 25±5 (2.5±0.5, 18.1±3.6)
3
4-7COMPONENT PARTS
1. Air Conditioning System

2. RHD MODEL
B4M0683A

1Receiver drier


2Pipe (Receiver drier—Evaporator module)


3Evaporator unit


4Hose (Low-pressure)


5A/C relay


6Fuse


7Hose (High-pressure)


8Compressor


9Condenser


10Pipe (Condenser—Receiver drier)
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 7.4±2.0 (0.75±0.2, 5.4±1.4)
T2: 15±3 (1.5±0.3, 10.8±2.2)
T3: 15±5 (1.5±0.5, 10.8±3.6)
T4: 25±5 (2.5±0.5, 18.1±3.6)
4
4-7COMPONENT PARTS
1. Air Conditioning System

2. Evaporator Unit
1. LHD MODEL
B4M0086A

1Thermo control amplifier


2Case upper


3Cooling unit


4Pipe


5Seat


6Expansion valve


7Drain hose


8Case lower


9Resistor


10Resistor bracket
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 7.4±2.0 (0.75±0.2, 5.4±1.4)
T2: 10±3 (1.0±0.3, 7.2±2.2)
T3: 15±5 (1.5±0.5, 10.8±3.6)
T4: 20±5 (2.0±0.5, 14.5±3.6)
5
4-7COMPONENT PARTS
2. Evaporator Unit

2. RHD MODEL
B4M0684A

1Thermo control amplifier


2Case upper


3Cooling unit


4Pipe


5Expansion valve


6Drain hose


7Case lower


8Resistor
6
4-7COMPONENT PARTS
2. Evaporator Unit

3. Compressor
1. LHD MODEL
B4M0758A

1Alternator bracket


2Alternator


3Alternator bracket nut


4Bracket


5Compressor bracket lower


6Compressor


7Idler pulley ASSY


8Compressor bracket upper
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 23.0±4.4 (2.35±0.45, 17.0±3.3)
T2: 29±4 (3.0±0.4, 21.7±2.9)
T3: 35±4 (3.6±0.4, 26.0±2.9)
7
4-7COMPONENT PARTS
3. Compressor