Subaru B9 TRIBECA WX 2007 Manual page 609

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
LAN SYSTEM (DIAGNOSTICS)
C: DTC B1100 INTEG. UNIT SYSTEM ERROR
DTC DETECTING CONDITION:
System error in body integrated unit
TROUBLE SYMPTOM:
• Check light comes on in the combination meter, and displays communication error display "Er IU".
• LAN communication immobilizer function may not be executed normally.
Step
1 CHECK DTC.
Connect the Subaru Select Monitor and read all
DTCs.
2 CHECK DTC.
Check the DTC displayed in the body integrated
unit.
3 CHECK DTC.
Turn the ignition switch to OFF, and read the
DTC again.
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.
5 CHECK ALL DTCS.
6 CHECK DTC CONCERNING ECM.
Check
Is there any DTC other than for
the body integrated unit?
Is the DTC displayed a current
malfunction?
Is the DTC displayed a current
malfunction?
Do all data values match?
Is DTC concerning ECM dis-
played?
Is output DTC on ECM con-
cerning CAN communication
failure?
LAN(diag)-34
Yes No
Go to step 2.
Perform the diag-
nosis according to
the DTC of other
control modules.
Replace the body Go to step 3.
integrated unit.
<Ref. to SL-51,
Body Integrated
Unit.>
Go to step 4.
Replace the body
integrated unit.
<Ref. to SL-51,
Body Integrated
Unit.>
A temporary poor Go to step 5.
contact has
occurred. Perform
the Clear Memory
operation.
Go to step 6. Replace the body
integrated unit.
<Ref. to SL-51,
Body Integrated
Unit.>
Replace the body Perform the diag-
integrated unit. nosis according to
<Ref. to SL-51, DTC concerning
Body Integrated ECM.
Unit.>