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 ...

Other materials:

Inspection
• Check each part for damage or dust.• Check oil strainer for clogging.• Measure the resistance of each solenoid.NOTE:Measurement should be performed at a temperature of 20°C (68°F).SolenoidTerminal No.Standard(-)Secondary solenoidNo. 1 — control valve bodyApprox. 6 ...