Subaru Legacy 2004 Service Manual page 3423

1. A/C CONTROL PANEL SELF-DIAGNOSIS
Step
1 SET SELF-DIAGNOSIS MODE BY OPERAT-
ING A/C CONTROL PANEL.
1) Turn the ignition switch to OFF.
2) Turn the ignition switch to ON with the
defroster switch and A/C switch pressed.
3) The screen display and indicator illuminate.
2 CHECK DISPLAY AND INDICATOR.
Check the display and all indicators illuminate.
3 CHECK SWITCH AND TEMPERATURE CON-
TROL DIAL INPUT.
According to the switch check table, press
each switch or turn the temperature control
dial, and check the relative screen display and
indicators illuminate. <Ref. to AC(diag)-12,
SWITCH CHECK TABLE, OPERATION, Diag-
nostic Chart for Self-Diagnosis.>
4 CHECK A/C CONTROL PANEL COMMUNI-
CATION.
1) Turn the ignition switch to OFF.
2) Disconnect the auto A/C control module
harness connector.
3) Using a suitable lead wire, short the termi-
nal No. 15 and No. 16 of auto A/C control mod-
ule harness connector (B283).
4) Turn the ignition switch to ON with the rear
defogger switch and A/C switch pressed.
5) When no malfunction occurs in the control
panel communication, "CL" is displayed in the
screen; and when malfunction occurs, "OP" is
displayed.
Diagnostic Chart for Self-Diagnosis
Does the self-diagnosis mode
operate?
Do the display and all indica-
tors illuminate?
Does the screen display
related to each switch and dial
input illuminate?
Is "CL" displayed in the
screen?
AC(diag)-11
HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS)
Check Yes
Go to step 2.
Go to step 3.
Go to step 4.
A/C control panel
is normal. Turn the
ignition switch to
OFF, and connect
the auto A/C con-
trol module har-
ness connector.
No
<Ref. to AC(diag)-
15, A/C OR SELF-
DIAGNOSIS SYS-
TEMS DO NOT
OPERATE, Diag-
nostics for A/C
System Malfunc-
tion.>
Replace the A/C
control panel.
Replace the A/C
control panel.
Replace the A/C
control panel.