Subaru B9 TRIBECA WX 2007 Manual page 452

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3. A/C CONTROL SYSTEM SELF-DIAGNOSIS
Step
1 SET SELF-DIAGNOSIS MODE BY OPERAT-
ING A/C CONTROL PANEL.
1) Start the engine with the auto switch and
FRESH/RECIRC switch pressed.
NOTE:
Self-diagnosis can also be performed with igni-
tion switch ON, but start the engine because ob-
serving the magnet clutch operation is difficult.
2) All the indicators blink four times.
2 CHECK EACH SENSOR AND POTENTIOME-
TER
1) After the indicators stop blinking, automati-
cally change to the Inspection Mode of sensor
and potentiometer.
NOTE:
Display items can be changed each time the A/
C switch is pressed. (Step Operation)
2) When malfunction occurs in each sensor
and potentiometer, codes are displayed on the
screen. When no malfunction occurs in each
sensor and potentiometer, code "20" is dis-
played on the screen.
3) Identify the defective sensor according to
the sensor check table. <Ref. to AC(diag)-14,
SENSOR CHECK TABLE, OPERATION, Diag-
nostic Chart for Self-diagnosis.>
3 CHECK EACH ACTUATOR, BLOWER FAN
AND MAGNET CLUTCH.
1) After completing each sensor and potenti-
ometer inspection, change to the Inspection
Mode of actuator, blower fan and magnet clutch
by pressing the defroster switch.
2) Each mode will change and operate auto-
matically every four seconds.
NOTE:
Operation mode items can be changed each
time the A/C switch is pressed. (Step Opera-
tion)
3) Check the operation of actuator, blower fan
and magnet clutch in each mode according to
the operating mode table. <Ref. to AC(diag)-14,
OPERATING MODE TABLE, OPERATION,
Diagnostic Chart for Self-diagnosis.>
Diagnostic Chart for Self-diagnosis
Does the self-diagnosis func-
tion operate?
Are other codes except "20"
displayed?
Do the actuator, blower fan and
magnet clutch operate as
described in the operating
mode table?
AC(diag)-13
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
Check Yes
Go to step 2.
Repair the defec-
tive sensor. <Ref.
to AC(diag)-31,
Diagnostic Proce-
dure for Sensors.>
A/C control system
is normal. Press
the OFF switch
and complete the
self-diagnosis
function.
No
<Ref. to AC(diag)-
15, A/C OR SELF-
DIAGNOSIS SYS-
TEMS DO NOT
OPERATE, Diag-
nostics for A/C
System Malfunc-
tion.>
Go to step 3.
Repair the defec-
tive part in accor-
dance with each
diagnostic chart.
<Ref. to AC(diag)-
15, Diagnostics for
A/C System Mal-
function.> or <Ref.
to AC(diag)-24,
Diagnostic Proce-
dure for Actua-
tors.>