CONTINUOUSLY VARIABLE 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 ignition switch is off. This power allows the ECM to store data such as DTC history, freeze frame data and fuel trim values. If the battery voltage falls below a minimum level, the memory is cleared and the ECM determines 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. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P056014 System Voltage Circuit Short to Ground or Open An open in the ECM backup power source circuit for 3 seconds (1 trip detection logic).

  • Open or short in backup power source circuit

  • Battery

  • Battery terminals

  • ECM

 Comes on DTC stored

SAE Code:

P0562

Tech Tips

If DTC P056014 is stored, the ECM will not store other DTCs or the data stored in the ECM will be partially cleared.

WIRING DIAGRAM

Refer to SFI system DTC P056014.

Click here

CAUTION / NOTICE / HINT

Note


  • Perform initialization when parts related to the continuously variable transaxle are replaced.

    Click here

  • Check that no DTCs are stored after performing initialization.

    Click here

  • After turning ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

    Click here

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

Tech Tips


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


    1. Turn the ignition switch to ON and wait for 3 seconds or more.

    2. Check for DTCs again.

      Click here

PROCEDURE


  1. INSPECT BATTERY


    1. Inspect the battery.

      Click here

      OK
      Battery voltage is between 11 and 14 V.
      Result
      Proceed to
      OK
      NG

    NG

    CHARGE OR REPLACE BATTERY

    OK

  2. CHECK BATTERY TERMINAL


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

      Click here

      OK
      Battery terminals are not loose or corroded.
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE BATTERY TERMINAL

    OK

  3. CHECK HARNESS AND CONNECTOR (POWER SOURCE OF ECM)


    1. A001SLXC16
      *a

      Front view of wire harness connector

      (to ECM)

      Disconnect the ECM connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A38-1 (BATT) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    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 ignition switch to ON.

    3. Turn the GTS on.

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


      Powertrain > Transmission > Clear DTCs

    5. Clear the DTCs.

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

    7. Turn the ignition switch to ON.

    8. Turn the GTS on.

    9. Wait for 3 seconds or more.

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


      Powertrain > Transmission > Trouble Codes

    11. Read the DTCs.

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

    B

    CHECK FOR INTERMITTENT PROBLEMS Click here

    A

  5. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    PERFORM INITIALIZATION Click here