Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc u0401 invalid data received from 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 u0401 invalid data received from ecm/pcm "a"

Detected when there is malfunction in CAN data from the engine control module (ECM).

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 ...

Dtc u0155 lost communication with instrument panel cluster (ipc) control module

Detected when CAN data from meter does not arrive.NOTE:Perform the diagnosis for LAN system. Basic Diagnostic Procedure > PROCEDURE ...

Other materials:

Ignition timing inspection
CAUTION:After warming-up, engine becomes very hot. Be careful not to burn yourself at measurement.1. Before checking the ignition timing, check the following item:(1) Check the air cleaner element is free from clogging, spark plugs are in good condition, and hoses are connected properly.(2) Check th ...