Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc u0101 lost communication with tcm

Subaru Legacy BN/BS (2015-2019) Service Manual / Keyless access with push button start system (diagnostics) / Diagnostic procedure with diagnostic trouble code (dtc) / 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

Dtc b2271 ign relay control circuit

DTC DETECTING CONDITION:• When malfunction is detected in IG1 and IG2 drive circuits in the keyless access CM.• When malfunction is detected in IG hold circuit in the keyless access CM.TRO ...

General description

...

Other materials:

Inspection mode procedure
1. Turn the ignition switch to ON.2. Turn on the headlight low beam.3. Check that the beam axes move when the vehicle condition is kept for three seconds or more after the vehicle posture is changed with the vehicle stopped.4. Read the DTC and check that the DTC is not displayed. Read Diagnostic Tr ...