SUBARU LEGACY 1996 Service Repair Manual

2. RHD MODEL
B4M0056A
1Intake unit case upper

2Bell mouth intake

3Intake unit case lower

4Intake door A

5Blower motor ASSY
6Intake door motor

7Lever A

8Link

9Lever B

10Intake door B
8
4-6COMPONENT PARTS
3. Intake Unit

4. Control Unit
1. LHD MODEL
B4M0369A
1Back plate

2Bulb

3Fan switch ASSY

4Illumi. plate

5Switch base

6Control panel

7Fan switch knob

8RECIRC switch
9A/C switch

10Temp. switch knob

11Mode switch

12Temp. lever ASSY

13Base plate

14Control amp.

15Temp. control cable
9
4-6COMPONENT PARTS
4. Control Unit

2. RHD MODEL
B4M0057A
1Back plate

2Bulb

3Fan switch ASSY

4Illumi. plate

5Switch base

6Control panel

7Fan switch knob

8RECIRC switch
9A/C switch

10Temp. switch knob

11Mode switch

12Temp. lever ASSY

13Base plate

14Control amp.

15Temp. control cable
10
4-6COMPONENT PARTS
4. Control Unit

1. Supplemental Restraint System
“Airbag”
Airbag system wiring harness is routed near the instrument
panel, heater unit, blower motor and control unit.
CAUTION:

All Airbag system wiring harness and connectors
are colored yellow. Do not use electrical test equip-
ment on these circuit.

Be careful not to damage Airbag system wiring har-
ness when servicing the instrument panel, heater unit,
blower motor and control unit.
2. Heater Unit
A: REMOVAL AND INSTALLATION
1) Disconnect GND cable from battery.
2) Remove heater hoses (inlet, outlet) in engine compart-
ment.
NOTE:
Drain as much coolant from heater unit as possible, and
plug disconnected hose with cloth.
<Ref. to 2-5 [W1A0].>
3) Remove instrument panel.
<Ref. to 5-4 [W1A0].>
4) Remove steering support beam.
<Ref. to 5-1 [C600].>
5) Remove evaporator. (With A/C model)
<Ref. to 4-7 [W14A0].>
G4M0554
6) Remove heater unit.
11
4-6SERVICE PROCEDURE
1. Supplemental Restraint System“Airbag”- 2. Heater Unit

1. Supplemental Restraint System
“Airbag”
Airbag system wiring harness is routed near the instrument
panel, heater unit, blower motor and control unit.
CAUTION:

All Airbag system wiring harness and connectors
are colored yellow. Do not use electrical test equip-
ment on these circuit.

Be careful not to damage Airbag system wiring har-
ness when servicing the instrument panel, heater unit,
blower motor and control unit.
2. Heater Unit
A: REMOVAL AND INSTALLATION
1) Disconnect GND cable from battery.
2) Remove heater hoses (inlet, outlet) in engine compart-
ment.
NOTE:
Drain as much coolant from heater unit as possible, and
plug disconnected hose with cloth.
<Ref. to 2-5 [W1A0].>
3) Remove instrument panel.
<Ref. to 5-4 [W1A0].>
4) Remove steering support beam.
<Ref. to 5-1 [C600].>
5) Remove evaporator. (With A/C model)
<Ref. to 4-7 [W14A0].>
G4M0554
6) Remove heater unit.
11
4-6SERVICE PROCEDURE
1. Supplemental Restraint System“Airbag”- 2. Heater Unit

7) Installation is in the reverse order of removal.
Fitted length of heater hose over pipe:
25 — 30 mm (0.98 — 1.18 in)
8) Pour coolant. <Ref. to 2-5 [W1B0].>
B5M0025
3. Blower Motor Assembly
A: REMOVAL AND INSTALLATION
1) Disconnect GND cable from battery.
2) Remove glove box and pocket back panel. <Ref. to 5-4
[W1A0].>
3) Disconnect blower motor harness connector.
G4M0555
4) Disconnect aspirator pipe1.
5) Remove blower motor mounting screw.
6) Remove blower motor assembly.
7) Installation is in the reverse order of removal.
12
4-6SERVICE PROCEDURE
2. Heater Unit - 3. Blower Motor Assembly

7) Installation is in the reverse order of removal.
Fitted length of heater hose over pipe:
25 — 30 mm (0.98 — 1.18 in)
8) Pour coolant. <Ref. to 2-5 [W1B0].>
B5M0025
3. Blower Motor Assembly
A: REMOVAL AND INSTALLATION
1) Disconnect GND cable from battery.
2) Remove glove box and pocket back panel. <Ref. to 5-4
[W1A0].>
3) Disconnect blower motor harness connector.
G4M0555
4) Disconnect aspirator pipe1.
5) Remove blower motor mounting screw.
6) Remove blower motor assembly.
7) Installation is in the reverse order of removal.
12
4-6SERVICE PROCEDURE
2. Heater Unit - 3. Blower Motor Assembly

B5M0027
4. Control Unit
A: REMOVAL
1) Disconnect GND cable from battery.
2) Set temperature control lever to“FULL COLD”position.
3) Remove temperature control cable from heater unit.
NOTE:
Do not attempt to move link of heater unit during installa-
tion.
B4M0370
4) Remove cup holder.
5) Remove center panel and then disconnect connector.
B4M0059
6) Remove control unit assembly and disconnect connec-
tor.
B4M0060A
B: INSPECTION
1. FAN SWITCH
Check continuity between terminals at each switch posi-
tion.
LHD model
Switch
positionTerminals
123456
1

2
3
4
GND IGN
13
4-6SERVICE PROCEDURE
4. Control Unit

RHD model
Switch
positionTerminals
123456
1

2

3

4

GND IGN
B4M0061A
2. CONTROL UNIT
Check circuit continuity between each terminal, when push
control switch is turned ON.
LHD model
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
14
4-6SERVICE PROCEDURE
4. Control Unit

RHD model
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
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.
15
4-6SERVICE PROCEDURE
4. Control Unit