Subaru IMPREZA GD 2007 Series Manual page 3868

asieps_tobira_IM_US.book 3 ページ ２０１２年１月１７日 火曜日 午後３時４８分
2. General Description
A: CAUTION
1) Never connect the battery in reverse polarity.
Doing so may immediately damage the auto A/C
control module.
2) Do not disconnect the battery terminals while the
engine is running.
A large counter electromotive force will be generat-
ed in the generator, and this voltage may damage
electronic parts such as auto A/C control module
etc.
3) Before disconnecting the connectors of sensors
and the auto A/C control module, be sure to turn off
the ignition switch.
Auto A/C control module may be damaged.
4) Every A/C-related part is a precision part. Do not
drop them.
5) Airbag system wiring harness is routed near the
A/C control panel (auto A/C control module) and
junction box.
CAUTION:
• Do not use the electrical test equipment on
the airbag system wiring harnesses and con-
nector circuits.
• Be careful not to damage the airbag system
wiring harness when servicing the A/C control
panel (auto A/C control module) and junction
box.
B: INSPECTION
Before performing the diagnosis, check the follow-
ing items which may cause problems in the A/C
system.
1. BATTERY
1) Measure the battery voltage and check electro-
lyte.
Standard voltage:
12 V
Specific gravity:
1.260 or more
2) Check the condition of the fuses for A/C system
power supply and other fuses.
3) Check the condition of harness and harness
connector connections.
2. ASPIRATOR HOSE
1) Turn the ignition switch to ON, and press the A/
C switch.
2) Turn the temperature control dial to maximum
hot position.
3) Turn the air flow control dial to "DEF" position.
4) Set the fan speed control dial to the MAX posi-
tion.
General Description
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
5) Put a strip of paper (b) close to the front side of
in-vehicle sensor suction port (a) located in the
auto A/C control module, and check that air is being
sucked into the port by seeing the paper moving to-
wards the port.
NOTE:
Be careful not to let the paper get sucked into the
port.
6) If the paper does not move at all, remove the
auto A/C control module <Ref. to AC-30, REMOV-
AL, Control Unit (Auto A/C Model).> and check for
poor connection of the aspirator hose (A), auto A/C
control module and heater unit, and set them if nec-
essary.
3. A/C LINE
Check the connection for A/C line (A) and lower
side high-pressure pipe.
4. CONTROL LINKAGE
1) Check the state of mode door linkage.
2) Check the state of air mix door linkage.
3) Check the state of intake door linkage.
AC(diag)-3
(b)
(a)
AC-01124
(A)
AC-01114
(A)
AC-01394