SFI SYSTEM, Diagnostic DTC:U012587, U012987, U110387

DTC Code DTC Name
U012587 Lost Communication With Multi-axis Acceleration Sensor Module Missing Message
U012987 Lost Communication With Brake System Control Module Missing Message
U110387 Lost Communication with Stop and Start Control Module Missing Message

DESCRIPTION

The ECM and engine stop and start ECU, airbag sensor assembly (yaw rate and acceleration sensor) and skid control ECU (brake actuator assembly) send and receive signals via CAN communication.

If a communication error occurs between the ECM and engine stop and start ECU, the ECM stores this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
U012587 Lost Communication With Multi-axis Acceleration Sensor Module Missing Message There is no communication between the ECM and airbag sensor assembly (yaw rate and acceleration sensor) (1 trip detection logic).

  • ECM

  • Airbag sensor assembly (yaw rate and acceleration sensor)

  • CAN Communication System

 Does not come on DTC stored SAE Code: U0125
U012987 Lost Communication With Brake System Control Module Missing Message There is no communication between the ECM and skid control ECU (brake actuator assembly) (1 trip detection logic).

  • ECM

  • Skid control ECU (brake actuator assembly)

  • CAN Communication System

 Comes on DTC stored SAE Code: U0129
U110387 Lost Communication with Stop and Start Control Module Missing Message There is no communication between the ECM and engine stop and start ECU (1 trip detection logic).

  • ECM

  • Engine stop and start ECU

  • CAN Communication System

 Does not come on DTC stored SAE Code: U1103

CONFIRMATION DRIVING PATTERN


  1. Connect the GTS to the DLC3.

  2. Turn the ignition switch to ON and turn the GTS on.

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

  4. Turn the ignition switch off and wait for at least 30 seconds.

  5. Turn the ignition switch to ON and turn the GTS on.

  6. Wait 5 seconds or more.

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

  8. 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.

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

  10. Input the DTC: U012587, U012987 or U110387.

  11. 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's memory limit

    Tech Tips


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

    • If the judgment result shows ABNORMAL, the system has a malfunction.

CAUTION / NOTICE / HINT

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. CHECK DTC OUTPUT (DTC U012587, U012987 OR U110387)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: System Select / Health Check.

    5. Read the DTCs using the GTS.

      Result
      Result Proceed to
      DTC U012587, U012987 or U110387 is output A
      DTC U012587, U012987 or U110387 and other DTCs are output B

      Tech Tips

      If any DTCs other than U012587, U012987 or U110387 are output, troubleshoot those DTCs first.


    A

    GO TO CAN COMMUNICATION SYSTEM Click here

    B

    GO TO DTC CHART