Subaru LEGACY 2004 Service Manual page 775

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
5
CHECK HARNESS.
1) Disconnect the ECM connector (*1: B136,
*2: B137).
2) Measure the resistance between harness
connector and chassis ground.
Connector & terminal
*1: 2.0 L SOHC RHD model, 2.5 L (KA)
RHD model, 2.0 L LHD model, 2.5 L (KS)
LHD model
(B136) No. 13 — Chassis ground:
(B136) No. 14 — Chassis ground:
*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
(B137) No. 18 — Chassis ground:
(B137) No. 26 — Chassis ground:
6
CHECK HARNESS.
1) Disconnect the body integrated unit con-
nector (B280), ECM connector (*1: B136, *2:
B137), TCM connector (B54), ABS (B301)/
VDC (B310) CM connector.
2) Measure the input voltage between har-
ness connector and chassis ground while turn-
ing the ignition switch to ON.
Connector & terminal
(B280) No. 20 (+) — Chassis ground (
(B280) No. 30 (+) — Chassis ground (
Check
Is the resistance less than 10
"?
Is the voltage more than 6 V?
!
):
!
):
LAN(diag)-59
LAN SYSTEM (DIAGNOSTICS)
Yes
Repair or replace
Go to step 6.
the short circuit of
harness.
Repair or replace
Read the DTC of
the short circuit of
ECM. Perform the
harness.
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)-26,
READ DIAGNOS-
TIC TROUBLE
CODE (DTC) FOR
ENGINE (NOR-
MAL MODE),
OPERATION,
Subaru Select
Monitor.> <Ref. to
EN(H4DOTC)(diag
)-21, READ DIAG-
NOSTIC TROU-
BLE CODE (DTC)
FOR ENGINE
(NORMAL
MODE), OPERA-
TION, Subaru
Select Monitor.>
<Ref. to
EN(H6DO)(diag)-
25, READ DIAG-
NOSTIC TROU-
BLE CODE (DTC)
FOR ENGINE
(NORMAL
MODE), OPERA-
TION, Subaru
Select Monitor.>
No

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