Subaru Legacy 2005 Service Manual page 4201

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
4 CHECK CURRENT DATA.
Connect the Subaru Select Monitor and dis-
play current data of the body integrated unit
(auto A/C fail).
5 CHECK AUTO A/C ECM.
1) Turn the ignition switch to OFF.
2) Disconnect the auto A/C ECM connector.
3) Turn the ignition switch to ON.
6 CHECK HARNESS.
1) Disconnect the body integrated unit con-
nector (B280) and auto A/C control module
connector (B283).
2) Check for open and short circuits between
body integrated unit connector and auto A/C
control module connector.
Connector & terminal
(B283) No. 1 — (B280) No. 26:
(B283) No. 11— (B280) No. 25:
7 CHECK CURRENT DATA.
Connect the Subaru Select Monitor and dis-
play current data of the body integrated unit
(meter fail).
8 CHECK COMBINATION METER.
1) Turn the ignition switch to OFF.
2) Disconnect the combination meter connec-
tor.
3) Turn the ignition switch to ON.
9 CHECK HARNESS.
1) Disconnect the combination meter connec-
tor (i10).
2) Check for open and short circuits between
the body integrated unit and combination
meter connectors.
Connector & terminal
(i10) No. 21 — (i84) No. 27:
(i10) No. 22 — (i84) No. 26:
10 CHECK CURRENT DATA.
Check the current data of the body integrated
unit (center display fail).
11 CHECK CENTER DISPLAY.
1) Turn the ignition switch to OFF.
2) Disconnect the center display connector
(i90 or i92).
3) Turn the ignition switch to ON.
Check
Is OK displayed?
Does the communications
error display disappear?
Is the harness in normal condi-
tion?
Is OK displayed?
Is B0301 detected?
Is the harness in normal condi-
tion?
Is OK displayed?
Does B0300 disappear?
LAN(diag)-71
LAN SYSTEM (DIAGNOSTICS)
Yes
Go to step 5. Perform auto A/C
self-diagnosis.
<Ref. to AC(diag)-
10, OPERATION,
Diagnostic Chart
for Self-Diagno-
sis.>
Go to step 6. Go to step 7.
Replace the auto Repair or replace
A/C ECM. <Ref. to the open or short
AC-33, REMOVAL, circuit of harness.
Control Unit (Auto
A/C Model).>
Go to step 8. Replace the com-
bination meter.
<Ref. to IDI-15,
REMOVAL, Com-
bination Meter.>
Go to step 9. Replace the com-
bination meter.
<Ref. to IDI-15,
REMOVAL, Com-
bination Meter.>
Go to step 10. Repair or replace
the open or short
circuit of harness.
Go to step 11. Repair or replace
the center display.
<Ref. to ET-15,
REMOVAL, Navi-
gation Display.>
Go to step 12. Go to step 13.
No