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

Dtc u0100 lost communication with ecm/pcm "a"

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

Preparation tool

CAUTION:To measure the voltage and resistance of airbag system component, be sure to use the specified test harness.1. SPECIAL TOOL• SUBARU SELECT MONITORILLUSTRATIONTOOL NUMBERDESCRIPTIONREMARK ...

Other materials:

Inspection
1. INSPECT THE SPECIFIED POSITION1. Measure the specified position of the stop light switch ends.Specified position L:3.6 mm ±0.4 mm (0.14 in ±0.016 in)2. Measure the clearance between the end of the stop light switch and the stopper.CAUTION:Be careful not to rotate the stop light switch.Stop ligh ...