LAN(diag)-53
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
8
CHECK DTC.
1) Turn the ignition switch to ON.
2) Read the DTC of body integrated unit using
Subaru Select Monitor.
Is U1201 a current malfunc-
tion?
Go to step
16
.
Go to step
9
.
9
CHECK DTC.
Read the DTC of body integrated unit using
Subaru Select Monitor.
Is U1202 a current malfunc-
tion?
Replace the VDC/
ABS CM. <Ref. to
ABS-6,
REMOVAL, ABS
Control Module
and Hydraulic Con-
trol Unit
(ABSCM&H/U).>
<Ref. to VDC-7,
REMOVAL, VDC
Control Module
and Hydraulic Con-
trol Unit
(VDCCM&H/U).>
Go to step
10
.
10
CHECK ECM.
1) Turn the ignition switch to OFF.
2) Connect the VDC/ABS CM.
3) Disconnect the ECM connector (B136).
4) Install the 120
:
resistance to ECM connec-
tor.
Terminals
(B136) No. 27 — No. 35:
5) Using the tester, measure the resistance
between terminals of data link connector.
Connector & terminal
(B40) No. 6 — No. 14:
Is the resistance 60
:
?
Go to step
11
.
Repair or replace
the open circuit of
harness.
11
CHECK DTC.
1) Turn the ignition switch to ON.
2) Read the DTC of body integrated unit using
Subaru Select Monitor.
Is U1201 a current malfunc-
tion?
Go to step
12
.
Repair or replace
the open circuit of
measured related
harness.
12
CHECK DTC.
Read the DTC of body integrated unit using
Subaru Select Monitor.
Is U1202 a current malfunc-
tion?
Replace the ECM.
<Ref. to
FU(H4SO)-45,
REMOVAL, Engine
Control Module
(ECM).> <Ref. to
FU(H4DOTC)-52,
REMOVAL, Engine
Control Module
(ECM).>
Go to step
13
.
13
CHECK DTC.
1) Reconnect all the disconnected connectors.
2) Turn the ignition switch to ON.
3) Read the DTC of body integrated unit using
Subaru Select Monitor.
Is U1201 a current malfunc-
tion?
Replace the body
integrated unit.
<Ref. to SL-50,
REMOVAL, Body
Integrated Unit.>
Go to step
14
.
14
CHECK HARNESS.
1) Shake the instrument harness and bulk-
head harness, rear harness.
2) Read the DTC of body integrated unit using
Subaru Select Monitor.
Is U1201 a current malfunc-
tion?
Repair or replace
the harness.
Go to step
15
.
Step
Check
Yes
No
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