AUTOMATIC TRANSAXLE SYSTEM, Diagnostic DTC:P056014

DTC Code DTC Name
P056014 System Voltage Circuit Short to Ground or Open

DESCRIPTION

The battery supplies electricity to the ECM even when the engine switch is off. This power allows the ECM to store data such as DTC history and freeze frame data. If the battery voltage falls below a minimum level, the stored data will be cleared and the ECM will determine that there is a malfunction in the power supply circuit. The next time the engine is started, the ECM will illuminate the MIL and store this DTC.

DTC No. DTC Detection Condition Trouble Area
P056014

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


  1. Always

  2. Open in ECM back up power source circuit

  3. 3 seconds

  4. 1-trip detection logic

  • Wire harness or connector

  • Open in back up power source circuit

  • Battery

  • Battery terminals

  • ECM

Tech Tips

If DTC P056014 is stored, the ECM will not store other DTCs.

WIRING DIAGRAM

A01W4X7E06
*a FL MAIN
*b EFI NO. 1
*c Battery

CAUTION / NOTICE / HINT

Note


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

  • Perform registration and/or initialization when parts related to the automatic transaxle 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. Turn the engine switch on (IG) and wait for 3 seconds or more.

  2. Check for DTCs again Click here.

PROCEDURE


  1. INSPECT BATTERY


    1. Inspect that the battery Click here.

      OK
      Battery is not depleted.

    NG

    CHARGE OR REPLACE BATTERY

    OK

  2. CHECK BATTERY TERMINAL


    1. Check that the battery terminals are not loose or corroded.

      OK
      Battery terminals are not loose or corroded.

    NG

    REPAIR OR REPLACE BATTERY TERMINAL

    OK

  3. CHECK TERMINAL VOLTAGE (POWER SOURCE OF ECM)


    1. A01W48HE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to ECM)

      Disconnect the A75 ECM connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A75-1 (BATT) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - ECM)

    OK

  4. CHECK WHETHER DTC OUTPUT RECURS (DTC P056014)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs Click here.

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

    6. Turn the engine switch on (IG) and turn the GTS on.

    7. Wait 5 seconds or more.

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

    9. Read the DTCs Click here.

      Result
      Result Proceed to
      DTC P056014 is output A
      DTCs are not output B

    A

    REPLACE ECM Click here

    B

    CHECK FOR INTERMITTENT PROBLEMS Click here