Subaru B9 TRIBECA WX 2007 Manual page 655

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
Step
1 CHECK COMMUNICATION LINE.
1) Warm up the engine.
2) Compare the data of body integrated unit
and combination meter using Subaru Select
Monitor.
Check item:
• Engine speed
• Shift range
2 CHECK HARNESS.
1) Disconnect the body integrated unit and
combination meter connector.
2) Measure the resistance between harness
connectors.
Connector & terminal
(i10) No. 29 — (i84) No. 27:
(i10) No. 30 — (i84) No. 26:
3 CHECK HARNESS.
1) Disconnect the CAN joint connector (i141
and i142) with the unit connector disconnected.
2) Measure the resistance between harness
connectors.
Connector & terminal
(i10) No. 29 — (i141) No. 1 to 4:
(i10) No. 30 — (i142) No. 1 to 4:
(i84) No. 27 — (i141) No. 1 to 4:
(i84) No. 26 — (i142) No. 1 to 4:
4 CHECK HARNESS.
Measure the resistance between harness con-
nector (i141 and i142) and chassis ground.
Connector & terminal
(i141) No. 1 to 4 — Chassis ground:
(i142) No. 1 to 4 — Chassis ground:
5 CHECK HARNESS.
1) Turn the ignition switch to ON.
2) Measure the voltage between harness con-
nector (i141 and i142) and chassis ground.
Connector & terminal
(i141) No. 1 to 4 (+) — Chassis ground (–):
(i142) No. 1 to 4 (+) — Chassis ground (–):
6 CHECK COMBINATION METER.
Perform the self-diagnosis of combination
meter. <Ref. to IDI-4, SELF-DIAGNOSIS,
INSPECTION, Combination Meter System.>
Check
Is the data displayed same?
Is the resistance less than 10
Ω?
Is the resistance less than 10
Ω?
Is the resistance less than 10
Ω?
Is the voltage 6 V or more?
Is the self-diagnosis OK?
LAN(diag)-80
Yes No
Go to step 2. Perform the self-
diagnosis of com-
bination meter.
<Ref. to IDI-4,
SELF-DIAGNO-
SIS, INSPEC-
TION,
Combination Meter
System.>
Go to step 4. Go to step 3.
Go to step 4. Repair or replace
the open circuit of
harness.
Repair the short Go to step 5.
circuit of harness
or replace har-
ness.
Repair the short Go to step 6.
circuit of harness
or replace har-
ness.
Temporary poor Check the connec-
contact occurs. tion of connector.
Replace the com-
bination meter.
<Ref. to IDI-12,
REMOVAL, Com-
bination Meter.>