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Home >> Subaru >> 2020 >> Crosstrek Base, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 14 (P-HEV Drive Motor System (Diagnostics)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC U0100-87: Lost Communication With ECM/Pcm "A" Missing Message >> Notes

DTC U0100-87: Lost Communication With ECM/Pcm "A" Missing Message: Notes

WARNING: This page is about a different variant/trim than selected.

1. - 

Detecting condition: 

Malfunction of CAN communication with ECM (CAN system malfunction)

(1 trip detection logic)

Trouble symptom: 

Normal driving

CAUTION: Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to P-HEV DRIVE MOTOR (DIAGNOSTICS)>GENERAL DESCRIPTION>CAUTION .
G13615896Courtesy of SUBARU OF AMERICA, INC.
  1. CHECK DTC  .

    Read the DTC of [P-HEV Drive Motor] using the Subaru Select Monitor. Ref. to P-HEV DRIVE MOTOR (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .

    NOTE:
    Related DTC 
    P312487 LOST COMMUNICATION BETWEEN DRIVE MOTOR "A" AND HV ECU MISSING MESSAGE

    Are any DTCs listed in reference above displayed?

    Yes:  Perform the diagnosis of DTC P312487. Ref. to P-HEV DRIVE MOTOR (DIAGNOSTICS)>DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)>DTC P312487 LOST COMMUNICATION BETWEEN DRIVE MOTOR "A" AND HV ECU MISSING MESSAGE .

    NOTE: DTC U010087, U029387 or U117087 may be output due to a malfunction that outputs DTC P312487. Check DTC P312487 first, and then perform the reproducing test to check that the DTC is not output.

    No:  Check the CAN communication system. Ref. to LAN SYSTEM (DIAGNOSTICS) (HEV)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .