SFI SYSTEM(w/ Canister Pump Module), Diagnostic DTC:U029387

DTC Code DTC Name
U029387 Lost Communication With Hybrid Powertrain Control Module Missing Message

MONITOR DESCRIPTION

The ECM and hybrid vehicle control ECU send and receive signals via CAN communication.

If a communication error occurs between the ECM and hybrid vehicle control ECU, the ECM illuminates the MIL and stores this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
U029387 Lost Communication With Hybrid Powertrain Control Module Missing Message

All of the following conditions are met for 0.576 seconds or more (1 trip detection logic):


  • Power switch on (IG)

  • Auxiliary battery voltage is 10 V or higher

  • No communication between ECM and hybrid vehicle control ECU

  • CAN communication system

  • Hybrid vehicle control ECU

  • ECM

 Comes on DTC stored SAE Code: U0293

MONITOR STRATEGY

Required Sensors/Components ECM
Frequency of Operation Continuous

CONFIRMATION DRIVING PATTERN


  1. Connect the GTS to the DLC3.

  2. Turn the power switch on (IG).

  3. Turn the GTS on.

  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  5. Turn the power switch off and wait for at least 30 seconds.

  6. Turn the power switch on (IG).

  7. Turn the GTS on.

  8. Wait 5 seconds or more.

  9. Enter the following menus: Powertrain / Engine / Trouble Codes.

  10. Read the pending DTCs.

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  11. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

  12. Input the DTC: U029387.

  13. Check the DTC judgment result.

    GTS Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


    • If the judgment result is NORMAL, the system is normal.

    • If the judgment result is ABNORMAL, the system is malfunctioning.

CAUTION / NOTICE / HINT

Note


  • Vehicle Control History may be stored in the hybrid vehicle control ECU if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the freeze frame data and Vehicle Control History can be useful for troubleshooting.

    Click here

    (Select Powertrain in Health Check and then check the time stamp data.)

    Click here

  • If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.

    Click here

Tech Tips

Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE


  1. GO TO CAN COMMUNICATION SYSTEM


    1. Refer to the CAN Communication System.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    END