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Home >> Infiniti >> 2016 >> Q50 Base, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 120 (Hybrid Battery System (Diagnostic Trouble Codes (DTCS) P3301-U1000 And Circuit Diagnosis) (Hybrid)) >> DTC / Circuit Diagnosis >> DTC U0101: Lost Communication TCM >> Diagnosis Procedure

Diagnosis Procedure

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

  1. START INSPECTION

    Check for malfunctions (Check "CAN DIAGNOSIS" results).

    Are there any current or past malfunctions?

    YES 

    Refer to TROUBLE DIAGNOSIS FLOW CHART .

    NO 

    GO TO STEP 2  .

  2. IDENTIFY MALFUNCTIONING PART

    G-20 WITH CONSULT

    Check "Self Diagnostic Result" of "MOTOR CONTROL".

    Detected DTC Malfunction part
    DTC U0100, U0101, U0111, and U0293
    • CAN communication system

      (Short circuit and traction motor inverter branch lines*1 )

    • ECM
    • HPCM
    • TCM
    • Li-ion battery controller
    • Traction motor inverter
    DTC U0100
    • ECM branch lines
    • ECM
    DTC U0101
    • TCM branch lines
    • TCM
    DTC U0111
    • Li-ion battery controller branch lines
    • Li-ion battery controller
    DTC U0293
    • HPCM branch lines
    • HPCM*2
    DTC U0111 and U0293 Main line between traction motor inverter and HPCM
    NOTE:
    • *1: If DTC "U0110" is detected by "EV/HEV", check traction motor inverter branch lines first.
    • *2: When replacing HPCM, replace battery junction box together with HPCM.

    Because of intermittent malfunction, check malfunctioning parts, based on the intermittent incident. Refer to INTERMITTENT INCIDENT .