CAN COMMUNICATION SYSTEM Electric Vehicle Control ECU Communication Stop Mode

DESCRIPTION

Detection Item Symptom Trouble Area
Electric Vehicle Control ECU Communication Stop Mode

Either condition is met:


  • "Electric Vehicle Control" is not displayed on the "Bus Check" screen.

  • "Electric Vehicle Control ECU Communication Stop Mode" in "DTC Communication Table" applies.

  • Power source or inside of electric vehicle control ECU assembly

  • Electric vehicle control ECU assembly CAN branch wire or connector

  • Electric vehicle control ECU assembly

WIRING DIAGRAM

A01CGW1E06

INSPECTION PROCEDURE

Note

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

Tech Tips

Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

PROCEDURE


  1. PRECAUTION

    Note

    After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work Click here.


    NEXT

  2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL


    1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the CAN main wire and the CAN branch wire.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the airbag system.

      Note

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


    NEXT

  3. CHECK FOR OPEN IN CAN BUS WIRE (ELECTRIC VEHICLE CONTROL ECU ASSEMBLY CAN BRANCH WIRE)


    1. A01CGU6E06
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Electric Vehicle Control ECU Assembly)

      Disconnect the electric vehicle control ECU assembly connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      E41-4 (CANH) - E41-5 (CANL) Ignition switch off 54 to 69 Ω
      E41-8 (CANP) - E41-9 (CANN) Ignition switch off 54 to 69 Ω

    NG

    REPAIR OR REPLACE ELECTRIC VEHICLE CONTROL ECU ASSEMBLY CAN BRANCH WIRE OR CONNECTOR (CANH, CANL, CANP, CANN)

    OK

  4. CHECK HARNESS AND CONNECTOR (ELECTRIC VEHICLE CONTROL ECU ASSEMBLY - BATTERY AND BODY GROUND)


    1. A01CIK4E04
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Electric Vehicle Control ECU Assembly)

      Connect the cable to the negative (-) battery terminal.

      Note

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

    2. Disconnect the electric vehicle control ECU assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E43-5 (GND1) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      E43-1 (AM1) - Body ground Always 20 to 28 V
      E43-2 (AM2) - Body ground Always 20 to 28 V
      E43-13 (ACC) - Body ground Ignition switch ACC 20 to 28 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ELECTRIC VEHICLE CONTROL ECU ASSEMBLY Click here