DTC U0100: Lost Communication With ECM/Pcm "A"

DTC detecting condition:

When no data was received from ECM for 5 seconds.

Trouble symptom:

There is no effect on outer mirror control module function.

NOTE: Perform the diagnosis for LAN system and ECM. Ref. to LAN SYSTEM (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE . Ref. to ENGINE (DIAGNOSTICS) (H4DO)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE . Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .