Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc u0100 lost communication with ecm/pcm "a"

Subaru Legacy BN/BS (2015-2019) Service Manual / Keyless access with push button start system (diagnostics) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc u0100 lost communication with ecm/pcm "a"

Detected when CAN data from the engine control module (ECM) does not arrive.

NOTE:

Perform the diagnosis for LAN system. Basic Diagnostic Procedure > PROCEDURE

Dtc u0073 control module communication bus off

Detected when CAN line abnormality is detected.NOTE:Perform the diagnosis for LAN system. Basic Diagnostic Procedure > PROCEDURE ...

Dtc u0422 invalid data received from body control module

Detected when CAN data from BIU is abnormal.NOTE:Perform the diagnosis for LAN system. Basic Diagnostic Procedure > PROCEDURE ...

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Dtc b1010 body control system (biu) malfunction
DTC DETECTING CONDITION:System error in body integrated unit (integrated unit EEPROM malfunction)Time Needed for Diagnosis:ImmediatelyTROUBLE SYMPTOM:LAN communication immobilizer function may not be executed normally.STEPCHECKYESNO1.CHECK DTC.Check DTC indicated by body integrated unit. Read Diagn ...