Subaru Legacy 2005 Service Manual page 4161

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK IGNITION SWITCH.
2 CHECK BATTERY.
1) Turn the ignition switch to OFF.
2) Measure the battery voltage.
3 CHECK BATTERY TERMINAL.
4 CHECK COMMUNICATION OF SUBARU SE-
LECT MONITOR.
1) Turn the ignition switch to ON.
2) Using the Subaru Select Monitor, check
whether communication to other systems can
be executed normally.
5 CHECK COMMUNICATION OF SUBARU SE-
LECT MONITOR.
1) Turn the ignition switch to OFF.
2) Disconnect the body integrated module
connector.
3) Turn the ignition switch to ON.
4) Check whether communication to other
systems can be executed normally.
6 CHECK HARNESS CONNECTOR BETWEEN
EACH CONTROL UNIT AND SUBARU SE-
LECT MONITOR.
1) Turn the ignition switch to OFF.
2) Disconnect the body integrated module
connector.
3) Measure the resistance between data link
connector and chassis ground.
Connector & terminal
(B40) No. 10 — Chassis ground:
7 CHECK OUTPUT SIGNAL TO BODY INTE-
GRATED MODULE.
1) Turn the ignition switch to ON.
2) Measure the voltage between body inte-
grated module connector and chassis ground.
Connector & terminal
(B40) No. 10 (+) — Chassis ground (
8 CHECK HARNESS CONNECTOR BETWEEN
BODY INTEGRATED MODULE AND DATA
LINK CONNECTOR.
Measure the resistance between body inte-
grated module connector and data link connec-
tor.
Connector & terminal
(B40) No. 10 — (B280) No. 19:
9 CHECK INSTALLATION OF BODY INTE-
GRATED MODULE CONNECTOR.
Turn the ignition switch to OFF.
Check
Is the ignition switch ON?
Is the voltage more than 11 V? Go to step 3.
Is there poor contact at battery
terminal?
Are system and model year
displayed?
Are system and model year
displayed?
Is the resistance more than 1
MΩ?
Is the voltage less than 1 V?
−
):
Is the resistance less than 1
Ω?
Is the body integrated module
connector inserted into body
integrated module until the
clamp locks onto it?
LAN(diag)-31
LAN SYSTEM (DIAGNOSTICS)
Yes
Go to step 2. Turn the ignition
switch to ON, and
select Integ. unit
mode using Sub-
aru Select Monitor.
Charge or replace
the battery.
Repair or tighten Go to step 4.
the battery termi-
nal.
Go to step 7. Go to step 5.
Go to step 7. Go to step 6.
Go to step 7. Repair the har-
ness and connec-
tor between each
control unit and
Subaru Select
Monitor.
Go to step 8. Repair the har-
ness and connec-
tor between each
control unit and
Subaru Select
Monitor.
Go to step 9. Repair the har-
ness and connec-
tor between body
integrated module
and Subaru Select
Monitor.
Go to step 10. Insert the body
integrated module
connector into
body integrated
module.
No