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

Dtc u0101 lost communication with tcm

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

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:

Inspection
Before performing diagnostics, check the following item which might affect engine problems.1. BATTERY1. Check the battery. Battery > INSPECTION2. Check the condition of the main and other fuses, and harnesses and connectors. Also check for proper grounding.2. ENGINE GROUNDMake sure that the engine ...