Subaru Legacy III (2000-2003 year). Manual - part 861

AC-32

HVAC SYSTEM (HEATER, VENTILATOR AND A/C)

HEATER BLOWER RESISTOR

9. Heater Blower Resistor

A: REMOVAL

1) Remove glove box.  <Ref. to EI-32, REMOVAL,
Glove Box.>
2) Disconnect power transistor connector.
3) Loosen 2 screws to remove power transistor.

B: INSTALLATION

Install in the reverse order of removal.

C: INSPECTION

1. MANUAL A/C

Measure switch resistance.

If NG, replace the blower resistor.

AC-00282

AC-00283

4

3

2

1

Terminal No.

Condition

Standard

4 and 3

Constant

Approx. 0.46 

Ω

3 and 2

Constant

Approx. 0.85 

Ω

2 and 1

Constant

Approx. 1.77 

Ω

AC-33

HVAC SYSTEM (HEATER, VENTILATOR AND A/C)

HEATER CORE

10.Heater Core

A: REMOVAL

1) Remove heater unit. <Ref. to AC-30, REMOV-
AL, Heater Unit.>
2) Remove screws to separate heater unit case.
3) Remove heater core.

B: INSTALLATION

Install in the reverse order of removal.

AC-00284

AC-34

HVAC SYSTEM (HEATER, VENTILATOR AND A/C)

CONTROL UNIT

11.Control Unit

A: REMOVAL

1. AUTO A/C

1) Disconnect ground cable from battery.
2) Remove front cover (A).
3) Loosen 2 screws (B) to remove center panel (C).

4) Loosen screws to pull control unit slightly out of
center console.

5) Disconnect connector from antenna cable to re-
move control unit.

2. MANUAL A/C

1) Disconnect ground cable from battery.
2) Remove front cover (A).
3) Loosen 2 screws (B) to remove center panel (C).

4) Set temperature control switch to “FULL HOT”,
and disconnect temperature control cable from
heater unit.
5) Loosen screws to pull control unit slightly out of
center console.

6) Disconnect connector from antenna cable to re-
move control unit.

B: INSTALLATION

1. AUTO A/C

Install in the reverse order of removal.

2. MANUAL A/C

1) Install in the reverse order of removal.
2) Before installation, set temperature control
switch to “FULL HOT”.

(A) Hook pawl

(A) Hook pawl

AC-00285

:

( A )

( B )

( C )

( 1 )

AC-00286

AC-00285

:

( A )

( B )

( C )

( 1 )

AC-00287

AC-35

HVAC SYSTEM (HEATER, VENTILATOR AND A/C)

COMPRESSOR

12.Compressor

A: INSPECTION

1. MAGNETIC CLUTCH CLEARANCE

1) Check the clearance of the entire circumference
around the drive plate and pulley.

Standard:

0.45

±±±±

0.15 mm (0.0177

±±±±

0.0059 in)

2. MAGNETIC CLUTCH OPERATION

1) Disconnect the compressor connector.
2) Connect the No. 3 terminal of the compressor
connector from the battery to the positive (+) lead.
Ground the negative (

−

) lead to the body.

3) Make sure the magnet clutch engages.
If NG, replace the compressor.

B: REMOVAL

1) Perform oil return operation. <Ref. to AC-29,
OPERATION, Compressor Oil.>
2) Turn A/C switch OFF and stop the engine.
3) Using refrigerant recovery system, discharge re-
frigerant. <Ref. to AC-23, OPERATION, Refriger-
ant Recovery Procedure.>
4) Disconnect ground cable from battery.
5) Remove duct (A).

6) Disconnect low-pressure hose (A) and high-
pressure hose (B).

CAUTION:
Be careful not to lose O-rings on hose. Immedi-
ately seal hose with a plug or vinyl tape to pre-
vent the entry of contamination. 

7) Remove V-belt.  
H4 model <Ref. to ME(H4SO)-41, REMOVAL, V-
belt.>
H4 model <Ref. to ME(H6DO)-28, REMOVAL, V-
belt.>
8) Remove generator.  
H4 non-TURBO model <Ref. to SC(H4SO)-14, RE-
MOVAL, Generator.>
H4 TURBO model <Ref. to SC(H4DOSTC)-14, RE-
MOVAL, Generator.>
H6 model <Ref. to SC(H6DO)-14, REMOVAL,
Generator.>
9) Disconnect compressor harness from body har-
ness.
10) Remove bolts from compressor bracket.

AC-00288

AC-00289

( A )

(1) LHD model

(2) RHD model

AC-00465

( A )

( A )

( B )

( B )

( 1 )

( 2 )