Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 597
AC-47
In-Vehicle Sensor (Auto A/C Model)
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
24.In-Vehicle Sensor (Auto A/C Model)
A: REMOVAL
CAUTION:
Be careful not to damage the sensors and interior trims when removing.
1) Disconnect the ground cable from battery.
2) Remove the instrument panel lower cover. <Ref. to EI-54, INSTRUMENT PANEL LOWER, REMOVAL,
3) Remove the screws.
4) Disconnect the in-vehicle sensor connector and aspirator hose, and remove the in-vehicle sensor from the
instrument panel.
B: INSTALLATION
Install each part in the reverse order of removal.
AC-01811
AC-48
In-Vehicle Sensor (Auto A/C Model)
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
C: INSPECTION
UNIT INSPECTION
Preparation tool: Circuit tester
1) Check the resistance between in-vehicle sensor terminals.
CAUTION:
During inspection, be careful not to touch the sensor end in order to avoid misjudgment due to body
temperature.
2) Replace the in-vehicle sensor if the inspection result is not within the standard value.
Terminal No.
Inspection conditions
Standard
1 — 2
10°C
3.772 — 4.101 kΩ
15°C
3.096 — 3.338 kΩ
20°C
2.556 — 2.734 kΩ
25°C
2.121 — 2.251 kΩ
30°C
1.756 — 1.878 kΩ
35°C
1.462 — 1.574 kΩ
40°C
1.223 — 1.326 kΩ
45°C
1.028 — 1.122 kΩ
50°C
0.868 — 0.9542 kΩ
55°C
0.7363 — 0.8147 kΩ
60°C
0.6273 — 0.6984 kΩ
(140)
(122)
(104)
(86)
(68)
(50)
(32)
20
10
0
30
40
50
60
2 1
AC-02817
4.50
4.00
3.50
3.00
2.50
2.00
1.50
1.00
0.50
0.00
: STANDARD (MIN TOLERANCE)
: STANDARD (MAX TOLERANCE)
RESIST
ANCE
VALUE
TEMPERATURE
AC-49
Air Vent Grille
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
25.Air Vent Grille
A: REMOVAL
1. CENTER GRILLE
1) Insert a plastic remover into the slit at the bottom
of the center panel, to lift the panel.
2) Remove the claws and resin hook and then re-
move the center panel.
3) Remove the claws, and remove the air vent cen-
ter grille from the center panel.
2. SIDE GRILLE
1) Remove the ornament panel. <Ref. to EI-52,
ORNAMENT PANEL, REMOVAL, Center Con-
2) Remove the claws, and remove the air vent side
grille.
B: INSTALLATION
Install each part in the reverse order of removal.
C: INSPECTION
1) Check that the direction and amount of air can
be adjusted smoothly, and if there is any faulty, re-
place the air vent grille.
2) Check that the adjustment can be maintained in
each position, and if there is any faulty, replace the
air vent grille.
EI-02012
AC-01753
AC-50
Heater Duct
HVAC SYSTEM (HEATER, VENTILATOR AND A/C)
26.Heater Duct
A: REMOVAL
1. REAR HEATER DUCT
1) Remove the heater and cooling unit. <Ref. to
AC-36, REMOVAL, Heater and Cooling Unit.>
2) Remove the front seats. <Ref. to SE-6, REMOV-
3) Remove the lower inner trim (front). <Ref. to EI-
57, REMOVAL, Lower Inner Trim.>
4) Pull off the floor mat to remove the rear heater
duct center (A) and rear heater duct LH, RH (B).
B: INSTALLATION
Install each part in the reverse order of removal.
AC-00794
(A)
(B)
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