LAN(diag)-61
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
3
CHECK DTC.
1) Turn the ignition switch to OFF.
2) Disconnect all control module connectors
(B280, B310, B136, B230, B231, B380) that are
connected to high 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 U1223 a current malfunc-
tion?
Go to step
4.
Go to step
7.
4
CHECK HARNESS.
1) Turn the ignition switch to OFF.
2) Disconnect all control module connectors
(B280, B310, B136, B230, B231, B380) that are
connected to high speed CAN communication
line.
3) Using the tester, check for open, short
(power supply-output short, GND-output short)
in the harness.
Connector & terminal
(B40) No. 6 — (B310) No. 35:
(B40) No. 14 — (B310) No. 10:
Is harness normal?
Go to step
5.
Repair or replace
the harness.
5
CHECK DTC.
1) Connect the disconnected connectors.
2) Start the engine and stop.
3) Turn the ignition switch to ON.
4) Read the DTC of body integrated unit using
Subaru Select Monitor.
Is U1223 a current malfunc-
tion?
Go to step
6.
Go to step
7.
6
CHECK DTC.
Read all DTCs using the Subaru Select Monitor.
Is U0122 displayed?
Replace the VDC/
ABS CM. <Ref. to
VDC-8,
REMOVAL, VDC
Control Module
and Hydraulic Con-
trol Unit
(VDCCM&H/U).>
Replace the body
integrated unit.
<Ref. to SL-48,
REMOVAL, Body
Integrated Unit.>
7
CHECK HARNESS.
1) Shake the harness used for CAN communi-
cation circuit.
2) Read the DTC of body integrated unit using
Subaru Select Monitor.
Is U1223 a current malfunc-
tion?
Repair or replace
the harness.
Go to step
8.
8
CHECK CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect all control module connectors
(B280, B310, B136, B230, B231, B380) that are
connected to high speed CAN communication
line.
Is there connector terminal
where poor contact exists?
Repair the connec-
tor terminal where
poor contact
exists, or replace
harness.
Temporary poor
contact occurs.
Step
Check
Yes
No