LAN(diag)-58
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?
Check the connec-
tion of harness
connectors. Go to
step 3.
Go to step 4.
3
CHECK DTC.
Turn the ignition switch to OFF and read DTCs
again.
Is the DTC displayed a current
malfunction?
Replace the TCM.
<Ref. to 5AT-60,
Transmission Con-
trol Module
(TCM).>
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 TCM.
Read the DTC of the TCM using Subaru Select
Monitor. <Ref. to 5AT(diag)-18, OPERATION,
Subaru Select Monitor.>
Is DTC other than “CAN com-
munication” displayed?
Perform the diag-
nosis according to
DTC.
Replace the body
integrated unit.
<Ref. to SL-56,
REMOVAL, Body
Integrated Unit.>