Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 595
AC-39
Evaporator
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
B: INSTALLATION
CAUTION:
• Make sure that the water seal packing on the cover attachment area is securely attached.
• If the evaporator has been replaced, add an appropriate amount of compressor oil to the compres-
sor. <Ref. to AC-24, ADJUSTMENT, Compressor Oil.>
• Install the sensor in the location shown in the figures below.
1) Install each part in the reverse order of removal.
2) Charge refrigerant. <Ref. to AC-20, PROCEDURE, Refrigerant Charging Procedure.>
Tightening torque:
Refer to “COMPONENT” of “General Description”.
• Heater cooling unit: <Ref. to AC-4, HEATER COOLING UNIT, COMPONENT, General Description.>
• Blower motor unit: <Ref. to AC-6, BLOWER MOTOR UNIT, COMPONENT, General Description.>
(1) 148 mm (5.83 in) from the upper end of the fins
(2) Sixth row fin from the left end
(3) Sensor
(4) Evaporator
AC-01807
(3)
(2)
(1)
(3)
(2)
(1)
(4)
AC-40
Evaporator
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
C: INSPECTION
1. EVAPORATOR
1) Check the evaporator fin for dust. Blow with compressed air or flush fins with water as needed.
2) If any oil leak is found from the evaporator, replace the evaporator.
2. EVAPORATOR SENSOR
UNIT INSPECTION
Preparation tool: Circuit tester
1) Check the resistance between evaporator sensor terminals.
2) Replace the evaporator sensor if the inspection result is not within the standard value.
Terminal No.
Inspection conditions
Standard
1 — 2
-20°C
15.37 — 16.62 kΩ
-15°C
12.09 — 12.87 kΩ
-10°C
9.576 — 10.05 kΩ
-5°C
7.636 — 7.899 kΩ
0°C
6.132 — 6.256 kΩ
5°C
4.891 — 5.057 kΩ
10°C
3.928 — 4.113 kΩ
15°C
3.174 — 3.366 kΩ
20°C
2.581 — 2.77 kΩ
25°C
2.111 — 2.292 kΩ
30°C
1.737 — 1.907 kΩ
35°C
1.437 — 1.595 kΩ
40°C
1.195 — 1.34 kΩ
(122)
(104)
(86)
(68)
(50)
(32)
(14)
0
10
20
30
40
50
2 1
AC-02815
18.00
16.00
14.00
12.00
10.00
8.00
6.00
4.00
2.00
0.00
-30
-20
-10
(-32)
(-4)
: STANDARD (MIN TOLERANCE)
: STANDARD (MAX TOLERANCE)
RESIST
ANCE
VALUE
TEMPERATURE
AC-41
Hose and Pipe
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
19.Hose and Pipe
A: REMOVAL
CAUTION:
• When disconnecting hoses, do not apply ex-
cessive force.
• Seal the disconnected hose, pipe and engag-
ing part of component with a plug or vinyl tape
to prevent foreign matter from entering.
1) Disconnect the ground cable from battery.
2) Using the refrigerant recovery system, dis-
charge refrigerant. <Ref. to AC-19, PROCEDURE,
Refrigerant Recovery Procedure.>
3) Remove the bolt and detach the hoses and
pipes.
B: INSTALLATION
CAUTION:
• Replace the O-rings with new parts.
• When connecting hoses, do not apply an ex-
cessive force to them. After installing, check
that no torsion or excessive tension applied to
the hoses.
• If the hose and pipe has been replaced, add
an appropriate amount of compressor oil to the
compressor. <Ref. to AC-24, ADJUSTMENT,
1) Install each part in the reverse order of removal.
2) Charge refrigerant. <Ref. to AC-20, PROCE-
DURE, Refrigerant Charging Procedure.>
Tightening torque:
Refer to “COMPONENT” of “General Descrip-
tion”. <Ref. to AC-9, AIR CONDITIONING
UNIT, COMPONENT, General Description.>
C: INSPECTION
Check the hoses for cracks, damage and expan-
sion, and then replace it with a new part if defective.
AC-42
Relay and Fuse
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
20.Relay and Fuse
A: LOCATION
B: INSPECTION
1. FUSE
1) Remove the fuse and inspect visually.
2) If the fuse is blown out, replace the fuse.
2. RELAY
1) Connect terminal No. 4 to the battery positive
terminal and the terminal No. 3 to the battery neg-
ative terminal, and check the resistance value be-
tween the relay terminals.
2) Replace the relay if the inspection result is not
within the standard value.
(1) Joint box
(2) Main fuse box
Main fan relay 1
(A)
Main fan relay 2
(B)
Sub fan relay
(C)
A/C relay
(D)
A/C Fuse
(E)
(E)
(1)
(2)
(A)
(D)
(C)
(B)
AC-01570
Continuity
Terminal No.
Specification
Yes
1 and 2
Less than 1 Ω
None
1 MΩ or more
LI-00001
(1)
(2)
(1)
(4)
(2)
(3)
(3)
(4)
SL-01317
(1)
(2)
(1)
(4)
(2)
(3)
(3)
(4)
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