AUTOMATIC TRANSMISSION SYSTEM(for 8AR-FTS), Diagnostic DTC:U010087

DTC Code DTC Name
U010087 Lost Communication with ECM/PCM "A" Missing Message

DESCRIPTION

The engine control unit and transmission control unit are located inside the ECM. The engine control unit intercommunicates with the transmission control unit using CAN communication.

If there is a problem in this intercommunication, the ECM stores this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
U010087 Lost Communication with ECM/PCM "A" Missing Message

1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other


  1. The engine switch is on (IG) and battery voltage is 9.5 V or more.

  2. No intercommunication between engine control unit and transmission control unit

  3. 1.25 seconds or more

  4. 1-trip detection logic

 ECM Comes on DTC stored SAE Code: U0100

CAUTION / NOTICE / HINT

Note

Perform registration and/or initialization when parts related to the automatic transmission are replaced.

Click here

Tech Tips

After performing repair, clear the DTCs and perform the following procedure to check that DTCs are not output.


  1. Check that the battery voltage is 9.5 V or more.

  2. Turn the engine switch on (IG).

  3. Check for DTCs again.

    Click here

PROCEDURE


  1. CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC U010087)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Transmission / Trouble Codes.


      Powertrain > Transmission > Trouble Codes

    5. Read the DTCs using the GTS.

      Result
      Result Proceed to
      Only DTC U010087 is output A
      DTC U010087 and other DTCs are output B

    B

    GO TO DTC CHART Click here

    A

  2. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    PERFORM A/T CODE REGISTRATION Click here