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Home >> Toyota >> 2004 >> Prius >> Repair and Diagnosis (Single Page) >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> Hybrid Control System - Diagnosis >> DTC U0100/211: Lost Communication With ECM/Pcm "A", DTC U0100/212 Lost Communication With ECM/Pcm "A". DTC U0100/530 Lost Communication With ECM/Pcm "A", DTC U0111/208 Lost Communication With Battery Energy Control Module "A", DTC U0111/531 Lost Communication With Battery Energy Control Module "A", DTC U0129/220 Lost Communication With Brake System Control Module, DTC U0129/222 Lost Communication With Brake System Control Module, DTC U0129/528 Lost Communication With Brake System Control Module. DTC U0129/529 Lost Communication With Brake System Control Module. DTC U0131/433 Lost Communication With Power Steering Control Module, DTC U0131/434 Lost Communication With Power Steering Control Module, DTC U0146/435 Lost Communication With Gateway "A" >> Inspection Procedure
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Inspection Procedure

  1. READ OUTPUT DTC (CODES ALL) 
    1. Connect the hand-held tester to the DLC3.
    2. Turn the power switch ON (IG).
    3. Turn the hand-held tester ON
    4. On the hand-held tester, enter the following menus: DIAGNOSIS / OBD/MOBD / CODES (All).
    5. Read and record CAN communication malfunction DTCs.
      1. Result: 
      DTC OUTPUT DISPLAY

      Display (DTC Output) Go To
      U0100 (INF211) or U0129 (INF220) A
      U0100 (INF 211) and CAN communication malfunction DTCs B
      U0129 (INF 220) and CAN communication malfunction DTCs B
      P3108 (INF 594) and CAN communication malfunction DTCs B

      HINT:

      • When DTCs other than CAN communication malfunction DTCs are output simultaneously, first correct the CAN communication problem, and then perform troubleshooting for other DTCs.
      • DTC P3108 (INF 594) is one of the DTCs that indicates a CAN communication malfunction.

      B: GO TO CAN COMMUNICATION SYSTEM (See  CAN COMMUNICATION SYSTEM - DIAGNOSIS  ) 

      A: Go to Next Step 

    6. CHECK TERMINAL OF ECM AND ECUS (+B1, +B2, CANH AND CANL TERMINALS) 
      1. Check connection condition of each connector of the HV control ECU, ECM and battery ECU, as well as contact condition of each terminal shown in the table below.
        ECV TYPE

        Type of ECU Terminal No. Symbols
        HV control ECU H16-7 +B1
        HV control ECU H16-6 +B2
        HV control ECU H14-8 CANH
        HV control ECU H14-9 CANL
        ECM E6-31 CANH
        ECM E6-30 CANL
        Battery ECU B11-18 CANH
        Battery ECU B11-19 CANL
        Fig 1: Locating H16 And H14 HV Control ECV Connector Terminals
        G02917971Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        1. OK: Connectors have been connected securely and there is no poor contact on each terminal. 
        Fig 2: Locating E6 ECM Connector Terminal CANG And GANL
        G02917972Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        Fig 3: Locating B11 Battery ECU Connector Terminal CANL And CANH
        G02917973Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        NG: CONNECT SECURELY 

        OK: CHECK FOR INTERMITTENT PROBLEMS (See  CHECK FOR INTERMITTENT PROBLEMS   ) 

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