Subaru Legacy (2005 year). Service manual — part 1045
LAN(diag)-59
LAN SYSTEM (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
O: DTC B0221 CAN-HS ECM NO-RECEIVE DATA
DTC DETECTING CONDITION:
Defective ECM. (If error is in the main harness, DTC P0600 High-speed CAN circuit is input simultaneously.)
TROUBLE SYMPTOM:
• Malfunction indicator light illuminates.
• “Er HC” 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
LAN(diag)-60
LAN SYSTEM (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
Check
Yes
No
1
CHECK HARNESS.
1) Disconnect the body integrated module
connector.
2) Measure the resistance between body inte-
grated module connectors.
Connector & terminal
(B280) No. 20 — No. 30:
Is the resistance 55 — 65
Ω?
Read the DTC of
ECM. Perform the
diagnosis accord-
ing to DTC. <Ref.
to EN(H4SO
2.0)(diag)-25,
READ DIAGNOS-
TIC TROUBLE
CODE (DTC) FOR
ENGINE (NOR-
MAL MODE),
OPERATION,
Subaru Select
Monitor.> <Ref. to
EN(H4SO
2.5)(diag)-25,
READ DIAGNOS-
TIC TROUBLE
CODE (DTC) FOR
ENGINE (NOR-
MAL MODE),
OPERATION,
Subaru Select
Monitor.> <Ref. to
EN(H4DOTC)(diag
)-24, READ DIAG-
NOSTIC TROU-
BLE CODE (DTC)
FOR ENGINE
(NORMAL
MODE), OPERA-
TION, Subaru
Select Monitor.>
<Ref. to
EN(H6DO)(diag)-
26, READ DIAG-
NOSTIC TROU-
BLE CODE (DTC)
FOR ENGINE
(NORMAL
MODE), OPERA-
TION, Subaru
Select Monitor.>
2
CHECK HARNESS.
1) Disconnect the body integrated module
connector.
2) Measure the resistance between body inte-
grated module connectors.
Connector & terminal
(B280) No. 20 — No. 30:
Is the resistance 115 — 125
Ω?
∞ Ω Related line of
body integrated
module is open
when. Repair or
replace the open
circuit of harness.
LAN(diag)-61
LAN SYSTEM (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
3
CHECK HARNESS.
1) Disconnect the ECM connector.
2) Measure the resistance between harness
connector terminals.
Connector & terminal
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?
4
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?
Read the DTC of
ECM. Perform the
diagnosis accord-
ing to DTC. <Ref.
to EN(H4SO
2.0)(diag)-25,
READ DIAGNOS-
TIC TROUBLE
CODE (DTC) FOR
ENGINE (NOR-
MAL MODE),
OPERATION,
Subaru Select
Monitor.> <Ref. to
EN(H4SO
2.5)(diag)-25,
READ DIAGNOS-
TIC TROUBLE
CODE (DTC) FOR
ENGINE (NOR-
MAL MODE),
OPERATION,
Subaru Select
Monitor.> <Ref. to
EN(H4DOTC)(diag
)-24, READ DIAG-
NOSTIC TROU-
BLE CODE (DTC)
FOR ENGINE
(NORMAL
MODE), OPERA-
TION, Subaru
Select Monitor.>
<Ref. to
EN(H6DO)(diag)-
26, READ DIAG-
NOSTIC TROU-
BLE CODE (DTC)
FOR ENGINE
(NORMAL
MODE), OPERA-
TION, Subaru
Select Monitor.>
End resistance is
open. 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).>
Step
Check
Yes
No
LAN(diag)-62
LAN SYSTEM (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
5
CHECK HARNESS.
1) Disconnect the ECM connector.
2) Measure the resistance between ECM con-
nector and chassis ground.
Connector & terminal
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 — Chassis ground:
(B136) No. 14 — Chassis ground:
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
(B137) No. 18 — Chassis ground:
(B137) No. 26 — Chassis ground:
Is the resistance less than 10
Ω?
Repair or replace
the short circuit of
harness.
6
CHECK HARNESS.
1) Disconnect the body integrated module
(B280), ECM (B136, B137), TCM (B54), ABS
(B301)/VDC (B310) CM connectors.
2) Measure the input voltage between body
integrated module connector and chassis
ground while turning the ignition switch to ON.
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
the harness.
Read the DTC of
ECM. Perform the
diagnosis accord-
ing to DTC. <Ref.
to EN(H4SO
2.0)(diag)-25,
READ DIAGNOS-
TIC TROUBLE
CODE (DTC) FOR
ENGINE (NOR-
MAL MODE),
OPERATION,
Subaru Select
Monitor.> <Ref. to
EN(H4SO
2.5)(diag)-25,
READ DIAGNOS-
TIC TROUBLE
CODE (DTC) FOR
ENGINE (NOR-
MAL MODE),
OPERATION,
Subaru Select
Monitor.> <Ref. to
EN(H4DOTC)(diag
)-24, READ DIAG-
NOSTIC TROU-
BLE CODE (DTC)
FOR ENGINE
(NORMAL
MODE), OPERA-
TION, Subaru
Select Monitor.>
<Ref. to
EN(H6DO)(diag)-
26, READ DIAG-
NOSTIC TROU-
BLE CODE (DTC)
FOR ENGINE
(NORMAL
MODE), OPERA-
TION, Subaru
Select Monitor.>
Step
Check
Yes
No
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