PUSH-BUTTON START, 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).

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.

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. -

WIRING DIAGRAM

A01G3RME09

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 push-button start uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting Click here. Troubleshoot the push-button start after confirming that the communication systems are functioning properly.

  • 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

Related Data List and Active Test Items
DTC No. Data List Item Active Test Item
U0293 - -

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (POWER SOURCE)

    Result
    Proceed to
    OK
    NG

    1. A01G38PC09
      *a

      Front view of wire harness connector

      (to Power Management Control ECU)

      Disconnect the E111 and E112 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
      E111-1 (AM22) - Body ground Power switch off 11 to 14 V
      E112-7 (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. A01G38PC10
      *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
      E111-5 (E01) - Body ground Always Below 1 Ω
      E111-6 (E1) - Body ground Always Below 1 Ω
      E112-4 (E12) - Body ground Always Below 1 Ω
      E112-5 (E02) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK FOR DTC


    1. Clear the DTCs.


      Body Electrical > Power Source Control > Clear DTCs

    2. Check for DTCs again.


      Body Electrical > Power Source Control > Trouble Codes
      OK
      DTC U0293 is not output.
      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

    A

    END (USE SIMULATION METHOD TO CHECK) Click here

    B

    REPLACE POWER MANAGEMENT CONTROL ECU Click here

    C

    REPLACE POWER MANAGEMENT CONTROL ECU Click here