Subaru B9 TRIBECA WX 2007, Manual

Page: 634 / 861

LAN(diag)-59
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
Step Check Yes No
1 CHECK DTC.
Connect the Subaru Select Monitor and read all
DTCs.
Is there any DTC other than for
the body integrated unit? Perform the diag-
nosis according to
the DTC of other
control modules. Go to step 2 .
2 CHECK DTC.
Check the DTC displayed in the body integrated
unit.
Is the DTC displayed a current
malfunction? Replace the body
integrated unit.
<Ref. to SL-51,
REMOVAL, Body
Integrated Unit.> Go to step 3 .
3 CHECK DTC.
Turn the ignition switch to OFF, and read the
DTC again.
Is the DTC displayed a current
malfunction? Replace the body
integrated unit.
<Ref. to SL-51,
REMOVAL, Body
Integrated Unit.> Go to step
4
.
4 CHECK CURRENT DATA.
On the Subaru Select Monitor, display engine
speed and vehicle speed at the ECM, TCM,
VDC/ABS and body integrated unit under the
same conditions, and compare the data.
Do all data values match? A temporary poor
contact has
occurred. Perform
the Clear Memory
operation. Go to step 5 .
5 CHECK HARNESS.
1) Disconnect the body integrated unit connec-
tor (B280).
2) Measure the resistance between harness
connectors.
Connector & terminal
(B280) No. 20 — No. 30:
Is the resistance 55 — 65
Ω
?
(Specification 60
Ω
)
Read the DTC of
ECM. Perform the
diagnosis accord-
ing to the DTC.
<Ref. to
EN(H6DO)(diag)-
28, READ DIAG-
NOSTIC TROU-
BLE CODE (DTC)
FOR ENGINE
(NORMAL
MODE), OPERA-
TION, Subaru
Select Monitor.> Go to step 6 .
6 CHECK HARNESS.
1) Disconnect the body integrated unit connec-
tor (B280).
2) Measure the resistance between harness
connectors.
Connector & terminal
(B280) No. 20 — No. 30:
Is the resistance 115 — 125
Ω
?
(End resistance or main wiring
harness is open.)
Go to step
7
. Related line of
body integrated
unit is open when
∞ Ω
. Repair the
open circuit of har-
ness or replace
harness.
7 CHECK HARNESS.
1) Disconnect the ECM connector (B136).
2) Measure the resistance between harness
connector terminals.
Connector & terminal
(B136) No. 27 — No. 35:
Is the resistance 115 — 125 Ω ?
(End resistance specification
120
Ω
)
Go to step 8 . Go to step 9 .
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