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

Dtc u0100 lost communication with ecm/pcm "a"

DTC DETECTING CONDITION:No data is received from ECM.TROUBLE SYMPTOM:Cooperation control of transmission may not operate properly.STEPCHECKYESNO1.CHECK PERFORMING OF BASIC DIAGNOSTIC PROCEDURE.Was the ...

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 ...

Other materials:

To arm the system using power door locking switch
Close all windows and the moonroof (if equipped). Remove the key from the ignition switch (models without keyless access function)/make sure the push-button ignition switch is turned off (models with keyless access function).  Open the doors and get out of the vehicle. &nbs ...