ENTRY AND START SYSTEM(for Start Function), Diagnostic DTC:U0293

DTC Code DTC Name
U0293 Lost Communication with HV ECU

DESCRIPTION

This DTC is stored when the power management control ECU detects a CAN communication error inside the power management control ECU (power control section - HV control section).

DTC No. Detection Item DTC Detection Condition Trouble Area Note
U0293 Lost Communication with HV ECU CAN communication error inside the power management control ECU (power control section - HV control section) (1-trip detection logic*)

  • AM2 fuse

  • Power management control ECU

  • Wire harness or connector

    DTC Output Confirmation Operation:

  • Turn the power switch on (IG) and wait 10 seconds or more.

Vehicle Condition and Fail-safe Function when Malfunction Detected
Vehicle Condition when Malfunction Detected Fail-safe Function when Malfunction Detected
There is no effect on vehicle behavior. -
Related Data List and Active Test Items
DTC No. Data List and Active Test
U0293 -

WIRING DIAGRAM

A01MSZXE10

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the power switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

  • The entry and start system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the entry and start system (for Start Function) after confirming that the communication systems are functioning properly.

    Click here

  • Before replacing the power management control ECU, refer to entry and start system (for Start Function) Precaution.

    Click here

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

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

Tech Tips

When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (POWER SOURCE)

    Result
    Proceed to
    OK
    NG

    1. A01MSOUC16
      *a

      Front view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the K32 and K33 power management control ECU connectors.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      K32-1 (AM22) - Body ground Power switch off 11 to 14 V
      K33-7 (AM21) - Body ground Power switch off 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE

    OK

  2. CHECK HARNESS AND CONNECTOR (GROUND)

    Result
    Proceed to
    OK
    NG

    1. Disconnect the K32 and K33 power management control ECU connectors.

    2. A01MSOUC17
      *a

      Front view of wire harness connector

      (to Power Management Control ECU)

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K32-5 (E01) - Body ground Always Below 1 Ω
      K32-6 (E1) - Body ground Always Below 1 Ω
      K33-4 (E12) - Body ground Always Below 1 Ω
      K33-5 (E02) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CLEAR DTC


    1. Clear the DTCs.


      Body Electrical > Power Source Control > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  4. CHECK FOR DTC


    1. Recheck for DTCs.


      Body Electrical > Power Source Control > Trouble Codes
      OK
      DTC U0293 is not output.
      Result
      Proceed to
      OK
      NG

    OK

    END (TEMPORARY CONNECTION FAILURE IS SUSPECTED) Click here

    NG

    REPLACE POWER MANAGEMENT CONTROL ECU Click here