Subaru Legacy BN/BS (2015-2019) Service Manual: General description

Dtc u0100 lost communication with ecm/pcm "a"

NOTE:Refer to “LAN SYSTEM (DIAGNOSTICS)” for diagnostic procedure. Basic Diagnostic Procedure1. OUTLINE OF DIAGNOSIS (ENGINE TYPE FB)• Detect malfunction of CAN communication.• ...

Preparation tool

1. SPECIAL TOOLILLUSTRATIONTOOL NUMBERDescriptionREMARKS — (Newly adopted tool)SUBARU SELECT MONITOR 4Used for setting of each function and troubleshooting for electrical system.NOTE:For detailed op ...

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Operation
1. BRAKE LAMP LIGHTING OPERATION MODE BY SUBARU SELECT MONITORCAUTION:By executing the compulsory operation for the brake lamp relay, the electronic parking brake warning light may illuminate. After the brake light relay compulsory operation is executed, refer to “Basic Diagnostic Procedure&rd ...