Subaru Legacy (2005 year). Manual — part 1043
LAN(diag)-51
LAN SYSTEM (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
Check
Yes
No
1
CHECK TCM.
1) Disconnect the TCM connector (B54).
2) Perform the clear memory of body inte-
grated module. <Ref. to LAN(diag)-20, CLEAR
MEMORY MODE, OPERATION, Subaru
Select Monitor.>
3) Read DTC of body integrated module.
Is DTC B0202 displayed on
Subaru Select Monitor?
Replace the TCM.
<Ref. to 4AT-142,
Transmission Con-
trol Device.> <Ref.
to 5AT-61, Trans-
mission Control
Module (TCM).>
2
CHECK STEERING ANGLE SENSOR.
1) Disconnect the steering angle sensor con-
nector (B231).
2) Perform the clear memory mode of body
integrated module. <Ref. to LAN(diag)-20,
CLEAR MEMORY MODE, OPERATION, Sub-
aru Select Monitor.>
3) Read DTC of body integrated module.
Is DTC B0202 displayed on
Subaru Select Monitor?
Replace the steer-
ing angle sensor.
<Ref. to VDC-17,
REPLACEMENT,
Steering Angle
Sensor.>
3
CHECK BODY INTEGRATED MODULE.
1) Disconnect the body integrated module
connector (B280).
2) Read the data between VDC/ABSCM and
ECM.
Check item:
• Engine speed
• Average front wheel speed (value on con-
stant driving)
Engine speed, front wheel
speed is correctly communi-
cated. (Appears same value)
Replace the body
integrated mod-
ule. <Ref. to SL-
44, Body Inte-
grated Module.>
4
CHECK HARNESS.
1) Disconnect the body integrated module
connector.
2) Measure the resistance between body inte-
grated module connector terminals.
Connector & terminal
(B280) No. 20 — No. 30:
Is the resistance 55 — 65
Ω?
5
CHECK HARNESS.
1) Disconnect the body integrated module
connector.
2) Measure the resistance between body inte-
grated module connector terminals.
Connector & terminal
(B280) No. 20 — No. 30:
Is the resistance 115 — 125
Ω?
6
CHECK HARNESS.
1) Disconnect the harness connector of body
integrated module.
2) Measure the resistance between body inte-
grated module connector terminals.
Connector & terminal
(B280) No. 20 — No. 30:
Is the resistance more than 30
M
Ω?
Open harness on
related line of body
integrated mod-
ule. Repair or
replace the open
circuit of harness.
7
CHECK HARNESS.
1) Disconnect the VDC/ABSCM connector.
2) Measure the resistance between harness
connector terminals.
Connector & terminal
ABS
(B301) No. 11 — No. 26:
VDC
(B310) No. 13 — No. 29:
Is the resistance 115 — 125
Ω?
LAN(diag)-52
LAN SYSTEM (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
8
CHECK VDC/ABSCM.
1) Disconnect the VDC/ABSCM connector.
2) Measure the resistance between VDC/
ABSCM terminals.
Terminals
ABS
No. 11 — No. 26:
VDC
No. 13 — No. 29:
Is the resistance 115 — 125
Ω?
Open harness in
end resistance of
VDC/ABSCM.
Replace the VDC/
ABSCM. <Ref. to
ABS-6, ABS Con-
trol Module and
Hydraulic Control
Unit (ABSCM&H/
U).> <Ref. to VDC-
7, VDC Control
Module and
Hydraulic Control
Unit (VDCCM&H/
U).>
9
CHECK ECM.
1) Disconnect the ECM connector.
2) Measure the resistance between ECM ter-
minals.
Terminals
2.0 L SOHC RHD model, 2.5 L (KA) RHD
model, 2.0 L LHD model and 2.5 L (KS)
LHD model
(B136) No. 13 — No. 14:
Except for 2.0 L SOHC RHD and 2.5 L
(KA) RHD model, 2.5 L (EC, K4) LHD mod-
el, 3.0 L LHD model
(B137) No. 18 — No. 26:
Is the resistance 115 — 125
Ω?
Repair or replace
the open circuit of
harness connec-
tor.
Open harness in
end resistance of
ECM. Replace the
ECM. <Ref. to
FU(H4SO 2.0)-34,
Engine Control
Module (ECM).>
<Ref. to FU(H4SO
2.5)-37, Engine
Control Module
(ECM).> <Ref. to
FU(H4DOTC)-34,
Engine Control
Module (ECM).>
<Ref. to
FU(H6DO)-34,
Engine Control
Module (ECM).>
10
CHECK HARNESS.
1) Disconnect the body integrated module
connector.
2) Measure the resistance between body inte-
grated module connector and chassis ground.
Connector & terminal
(B280) No. 20 — Chassis ground:
(B280) No. 30 — Chassis ground:
Is the resistance less than 10
Ω?
Repair or replace
the ground short
circuit of the har-
ness.
11
CHECK HARNESS.
1) Disconnect the body integrated module
connector.
2) Measure the voltage between body inte-
grated module connector and chassis ground.
Connector & terminal
(B280) No. 20 (+) — Chassis ground (
−
):
(B280) No. 30 (+) — Chassis ground (
−
):
Is the voltage more than 6 V?
Repair or replace
the short circuit of
harness.
12
CHECK DTC.
Read the DTC of ECM using Subaru Select
Monitor. <Ref. to EN(H4SO 2.0)(diag)-25,
READ DIAGNOSTIC TROUBLE CODE (DTC)
FOR ENGINE (NORMAL MODE), OPERA-
TION, Subaru Select Monitor.> <Ref. to
EN(H4DOTC)(diag)-24, READ DIAGNOSTIC
TROUBLE CODE (DTC) FOR ENGINE (NOR-
MAL MODE), OPERATION, Subaru Select
Monitor.>
Is DTC other than “CAN com-
munication” displayed on Sub-
aru Select Monitor?
Perform the diag-
nosis according to
DTC.
Step
Check
Yes
No
LAN(diag)-53
LAN SYSTEM (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
13
CHECK DTC.
Read the DTC of VDC/ABSCM using Subaru
Select Monitor. <Ref. to ABS(diag)-15, READ
DIAGNOSTIC TROUBLE CODE (DTC),
OPERATION, Subaru Select Monitor.> <Ref. to
VDC(diag)-16, READ DIAGNOSTIC TROU-
BLE CODE (DTC), OPERATION, Subaru
Select Monitor.>
Is DTC other than “CAN com-
munication” displayed on Sub-
aru Select Monitor?
Perform the diag-
nosis according to
DTC.
14
CHECK DTC.
Read the DTC of TCM using Subaru Select
Monitor. <Ref. to 4AT(diag)-16, READ DIAG-
NOSTIC TROUBLE CODE (DTC), OPERA-
TION, Subaru Select Monitor.> <Ref. to
5AT(diag)-17, READ DIAGNOSTIC TROUBLE
CODE (DTC), OPERATION, Subaru Select
Monitor.>
Is DTC other than “CAN com-
munication” displayed on Sub-
aru Select Monitor?
Perform the diag-
nosis according to
DTC.
Replace the body
integrated mod-
ule. <Ref. to SL-
44, Body Inte-
grated Module.>
Step
Check
Yes
No
LAN(diag)-54
LAN SYSTEM (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
L: DTC B0211 CAN-HS ECM DATA ABNORMAL
DTC DETECTING CONDITION:
Defective data from ECM.
TROUBLE SYMPTOM:
“Er HC” or “Er EG” is displayed in odo/trip meter.
WIRING DIAGRAM:
LAN00114
B20
B30
TWISTED WIRE
BODY INTEGRATED
MODULE
B280
B:
ECM
B137
D:
C14
C13
D26
D18
B136
C:
ABSCM & H/U
VDCCM & H/U
TCM
B280
B:
5
4
6 7
8
2
1
9
3
10
22
23
11 12 13 14 15
24 25
26 27
16 17 18
28 29
19 20
21
30
B137
5
6
7
8
2
1
9
4
3
10
22 23
11 12 13 14 15
24 25
26
16 17
18 19 20 21
27
28 29
30 31
D:
*
1
*
2
B136
5
6
7 8
2
1
9
4
3
10
24
22 23
25
11 12 13 14 15
26 27
28
16
17 18 19 20 21
33 34
29
32
30
31
35
C:
1
*
: 2.0 L SOHC RHD MODEL;
2.5 L (KA) RHD MODEL;
2.0 L LHD MODEL;
2.5 L (KS) LHD MODEL
2
*
: EXCEPT FOR 2.0 L SOHC
RHD AND 2.5 L (KA) RHD
MODEL;
2.5 L (EC, K4) LHD MODEL;
3.0 L LHD MODEL
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