LAN(diag)-62
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
3
CHECK DTC.
Turn the ignition switch to OFF and read DTCs
again.
Is the DTC displayed a current
malfunction?
Go to step 5.
Go to step 4.
4
CHECK CURRENT DATA.
Using the Subaru Select Monitor, display
engine speed and vehicle speed signal from
ECM, TCM, VDC/ABS and body integrated unit
under the same conditions and compare data.
Do all data values match?
Temporary poor
contact occurs.
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
:?
(Specification 60
:)
Go to step 8.
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
:?
(End resistance or main wiring
harness is open.)
Go to step 7.
If the resistance is
1 M
: or larger, a
line related to the
body integrated
unit is open. Repair
the open circuit of
harness or replace
harness.
7
CHECK ECM.
Read the DTC of ECM using the Subaru Select
Monitor. <Ref. to EN(H6DO)(diag)-43, SUB-
ARU SELECT MONITOR (NORMAL MODE),
OPERATION, Read Diagnostic Trouble Code
(DTC).>
Are there any DTCs other than
one for “CAN communication”?
Perform the diag-
nosis according to
DTC. <Ref. to
EN(H6DO)(diag)-
43, SUBARU
SELECT MONI-
TOR (NORMAL
MODE), OPERA-
TION, Read Diag-
nostic Trouble
Code (DTC).>
Go to step 8.
8
CHECK BODY INTEGRATED UNIT.
1) Connect all the control module connectors.
2) Check the data of “body integrated unit data
received” on the current data display of ECM
using Subaru Select Monitor.
Is the “ON” displayed?
Go to step 9.
Replace the body
integrated unit.
<Ref. to SL-56,
REMOVAL, Body
Integrated Unit.>
9
CHECK BODY INTEGRATED UNIT.
Check the data of “body integrated unit counter
update” on the data display of ECM.
Is the “ON” displayed?
Replace the body
integrated unit.
<Ref. to SL-56,
REMOVAL, Body
Integrated Unit.>
Inspect the ECM.
<Ref. to
FU(H4SO)-39,
REMOVAL, Engine
Control Module
(ECM).> <Ref. to
FU(H4DOTC)-52,
REMOVAL, Engine
Control Module
(ECM).> <Ref. to
FU(H6DO)-38,
REMOVAL, Engine
Control Module
(ECM).>
Step
Check
Yes
No