DTC B0100 INTEG. Unit System Error

WARNING: This page is about a different car, the 2006 Subaru Outback, 2006 Subaru Legacy, and 2006 Saab 9-2X. However, it is still accessible from the selected car via links, so may be relevant.

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.

DIAGNOSTIC PROCEDURE CHART

Step	Check	Yes	No
1 CHECK ALL DTCS.	Is DTC concerning ECM displayed?	Go to step 2.	Replace the body integrated unit. < Ref. to , BODY INTEGRATED UNIT . >
2 CHECK DTC CONCERNING ECM.	Is output DTC on ECM concerning CAN communication failure?	Replace the body integrated unit. < Ref. to , BODY INTEGRATED UNIT . >	Perform the diagnosis according to DTC concerning ECM.