LAN(diag)-75
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK DTC.
Read the DTC of body integrated unit using
Subaru Select Monitor. <Ref. to LAN(diag)-15,
READ DIAGNOSTIC TROUBLE CODE (DTC),
OPERATION, Subaru Select Monitor.>
Are there DTC U1300 or
U1302?
Perform the diag-
nosis according to
DTC.
Go to step
2
.
2
CHECK DTC.
Read the DTC of body integrated unit using
Subaru Select Monitor.
Is U1301 current malfunction? Go to step
3
.
Go to step
9
.
3
CHECK DTC.
1) Turn the ignition switch to OFF.
2) Disconnect all connectors (i84, i10, i88, i85
or i50) that are connected to low speed CAN
communication line.
3) Connect the disconnected connectors.
4) Turn the ignition switch to ON.
5) Read the DTC of body integrated unit using
Subaru Select Monitor.
Is U1301 current malfunction? Go to step
4
.
Go to step
9
.
4
CHECK HARNESS.
1) Turn the ignition switch to OFF.
2) Disconnect all connectors (i84, i10, i88, i85
or i50) that are connected to low speed CAN
communication line.
3) Using the tester, inspect the open circuit of
harness and short (power supply-output short,
GND-output short).
Connector & terminal
(i84) No. 1 — (i10) No. 27 (combination
meter):
(i84) No. 9 — (i10) No. 26 (combination
meter):
(i84) No. 1 — (i88) No. 20 (auto A/C):
(i84) No. 9 — (i88) No. 19 (auto A/C):
(i84) No. 1 — (i85) No. 12 (audio):
(i84) No. 9 — (i85) No. 11 (audio):
(i84) No. 1 — (i50) No. 18 (navigation):
(i84) No. 9 — (i50) No. 6 (navigation):
Is harness normal?
Go to step
5
.
Repair or replace
the harness.
5
CHECK AUDIO OR NAVIGATION.
1) Connect the disconnected connectors.
2) Disconnect the connector of navigation (i85)
or audio (i50).
3) Turn the ignition switch to ON.
4) Read the DTC of body integrated unit using
Subaru Select Monitor.
Is U1301 current malfunction? Go to step
6
.
Go to step
9
.
6
CHECK AUTO A/C CONTROL MODULE.
1) Turn the ignition switch to OFF.
2) Connect the audio or navigation module.
3) Disconnect the auto A/C control module
connector (i88).
4) Turn the ignition switch to ON.
5) Read the DTC of body integrated unit using
Subaru Select Monitor.
Is U1301 current malfunction? Go to step
7
.
Replace the auto
A/C control mod-
ule. <Ref. to AC-
33, REMOVAL,
Control Unit (Auto
A/C Model).>
7
CHECK COMBINATION METER.
1) Turn the ignition switch to OFF.
2) Connect the disconnected connectors.
3) Perform the self-diagnosis of combination
meter. <Ref. to IDI-4, SELF-DIAGNOSIS,
INSPECTION, Combination Meter System.>
Is the self-diagnosis of combi-
nation meter OK?
Go to step
8
.
Replace the com-
bination meter.
<Ref. to IDI-16,
REMOVAL, Com-
bination Meter.>
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