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CAN COMMUNICATION SYSTEM Hybrid Battery ECU Communication Stop Mode

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DTC Code DTC Name
  Hybrid Battery ECU Communication Stop Mode
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DESCRIPTION

Detection Item Symptom Trouble Area
Hybrid Battery ECU Communication Stop Mode

Any of the following conditions are met:


  • Communication stop for "HV Battery" is indicated on the "Communication Bus Check" screen of the GTS.

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  • Communication stop history for "HV Battery" is indicated on the "Communication Bus Check (Detail)" screen of the GTS. (The Lost Communication Time value for "HV Battery" is 6 or more.)

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  • Communication system DTCs (DTCs that start with U) that correspond to "Hybrid Battery ECU Communication Stop Mode" in "DTC Combination Table" are output.

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  • Battery ECU assembly branch wire or connector

  • Power source circuit of battery ECU assembly

  • Battery ECU assembly ground circuit

  • Battery ECU assembly

  • No. 2 HV battery pack wire
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WIRING DIAGRAM

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CAUTION / NOTICE / HINT

CAUTION:

  • When performing the confirmation driving pattern, obey all speed limits and traffic laws.


  • B004STG

    Before the following operations are conducted, take precautions to prevent electric shock by turning the power switch off, wearing insulated gloves, and removing the service plug grip from HV battery.


    • Inspecting the high-voltage system

    • Disconnecting the low voltage connector of the inverter with converter assembly

    • Disconnecting the low voltage connector of the HV battery

  • B004Y5N

    To prevent electric shock, make sure to remove the service plug grip to cut off the high voltage circuit before servicing the vehicle.

  • B004SX1

    After removing the service plug grip from the HV battery, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.

  • B004W3JC06
    *a Without waiting for 10 minutes

    After removing the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting for 10 minutes, check the voltage at the terminals in the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

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    Tip:

    Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly and the electric vehicle charger assembly.

Note:

  • Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.

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  • Inspect the fuses for circuits related to this system before performing the following procedure.

  • Before measuring the resistance of the CAN bus, turn the power switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) auxiliary battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.

  • After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

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  • Some parts must be initialized and set when replacing or removing and installing parts.

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  • After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.

    DTC check procedure: Turn the power switch on (IG) and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.

  • After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed as normal.

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Tip:

  • Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.

  • When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.

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PROCEDURE


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    CHECK FOR OPEN IN CAN BUS WIRE (BATTERY ECU ASSEMBLY BRANCH WIRE)


    1. Disconnect the cable from the negative (-) auxiliary battery terminal.

    2. Disconnect the Le1 No. 2 HV battery pack wire connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      Le 1-2 (CA2H) - Le 1-11 (CA2L) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR

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    CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)


    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      Le 1-1 (GND) - Body ground Always Below 1 Ω
      Le 1-10 (GND1) - Body ground Always Below 1 Ω

    2. Reconnect the cable to the negative (-) auxiliary battery terminal.

      Note:

      When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

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    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      Le 1-5 (AM) - Body ground Power switch off 11 to 14 V
      Le 1-14 (IGCT) - Body ground Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

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    CHECK FOR OPEN IN CAN BUS WIRE (BATTERY ECU ASSEMBLY BRANCH WIRE)


    1. Disconnect the cable from the negative (-) auxiliary battery terminal.

    2. Disconnect the battery ECU assembly connector.

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    3. Reconnect the Le1 No. 2 HV battery pack wire connector.

    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      e4-13 (CA2H) - e4-12 (CA2L) Cable disconnected from negative (-) auxiliary battery terminal 54 to 69 Ω
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR

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    CHECK HARNESS AND CONNECTOR (NO. 2 HV BATTERY PACK WIRE)


    1. Disconnect the Le1 No. 2 HV battery pack wire connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      Le 1-1 (GND) - e4-11 (GND) Always Below 1 Ω
      Le 1-5 (AM) - e4-20 (AM) Always Below 1 Ω
      Le 1-10 (GND1) - e4-31 (GND1) Always Below 1 Ω
      Le 1-14 (IGCT) - e4-40 (IGCT) Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE BATTERY ECU ASSEMBLYClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)