Toyota Yaris: Sfi System / System Voltage Circuit Short to Ground or Open (P056014)

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Engine & Hybrid System / G16e-gts (engine Control) / Sfi System / System Voltage Circuit Short to Ground or Open (P056014)

MONITOR DESCRIPTION

The auxiliary 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 auxiliary 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 or short in the ECM backup power source circuit (1 trip detection logic).

  • Open or short in backup power source circuit
  • Auxiliary battery
  • Auxiliary battery terminals
  • ECM

Comes on

DTC stored

SAE: P0562

MONITOR STRATEGY

Required Sensors/Components

ECM

Frequency of Operation

Continuous

TYPICAL MALFUNCTION THRESHOLDS

Continuous auxiliary battery voltage

Less than 3.5 V

CONFIRMATION DRIVING PATTERN

  1. Connect the GTS to the DLC3.
  2. Turn the ignition switch to ON.
  3. Turn the GTS on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the ignition switch off and wait for at least 30 seconds.
  6. Turn the ignition switch to ON.
  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.

    HINT:

    • 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: P056014.
  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

    HINT:

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

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.

    Click here

  • When disconnecting and reconnecting the auxiliary battery.

    HINT:

    When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

HINT:

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.

INSPECT AUXILIARY BATTERY

(a) Inspect that the auxiliary battery is not depleted.

Click here

OK:

Auxiliary battery is not depleted

NG

CHARGE OR REPLACE AUXILIARY BATTERY

OK

2.

CHECK AUXILIARY BATTERY

(a) Check that the auxiliary battery terminals are not loose or corroded.

OK:

Auxiliary battery terminals are not loose or corroded.

NG

REPAIR OR REPLACE AUXILIARY BATTERY TERMINAL

OK

3.

CHECK TERMINAL VOLTAGE (POWER SOURCE OF ECM)

(a) Disconnect the ECM connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

A106-1(BATT) - Body ground

Always

11 to 14 V

*a

Front view of wire harness connector

(to ECM)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - ECM)

OK

4.

CLEAR DTC

(a) Clear the DTCs.

Powertrain > Engine > Clear DTCs

(b) Turn the ignition switch off and wait for at least 30 seconds.

NEXT

5.

CHECK WHETHER DTC OUTPUT RECURS (DTC P056014)

(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

(b) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTCs are not output

A

P056014 is output

B

A

CHECK FOR INTERMITTENT PROBLEMS

B

REPLACE ECM

    Engine Oil Pressure Too Low (P052400)

    DESCRIPTION Refer to DTC P052012 DTC No. Detection Item DTC Detection Condition Trouble Area MIL Note P052400 Engine Oil Pressure Too Low When the engine is running, the oil pressure value output from the engine oil pressure and temperature sensor is less than the target value (1 trip detection logic)...

    Internal Control Module Random Access Memory (RAM) Error Data Memory Failure (P060444)

    MONITOR DESCRIPTION The ECM continuously monitors its internal memory status. This self-check ensures that the ECM is functioning properly. The ECM memory status is diagnosed by internal mirroring of the main CPU and sub CPU to detect Random Access Memory (RAM) errors...

    Other information:

    Toyota Yaris XP210 (2020-2022) Reapir and Service Manual: Internal Control Module Software Incompatibility Not Programmed (U030051,U030057)


    DESCRIPTION The millimeter wave radar sensor assembly receives vehicle information (Conv/HV/EV) or vehicle information (transmission type) from the ECM via the CAN communication line. If the millimeter wave radar sensor assembly cannot confirm the vehicle information (Conv/HV/EV) or vehicle information (transmission type) sent from the ECM, the millimeter wave radar sensor assembly stores DTC U030051...

    Toyota Yaris XP210 (2020-2022) Owner's Manual: Spare Tire


    Your Toyota has a temporary spare tire. The temporary spare tire is lighter and smaller than a conventional tire, and is designed only for emergency use and should be used only for VERY short periods. Temporary spare tires should NEVER be used for long drives or extended periods...

    Categories

    Liftgate/Trunk Lid

    WARNING

    Never allow a person to ride in the luggage compartment/trunk

    Allowing a person to ride in the luggage compartment/trunk is dangerous. The person in the luggage compartment/trunk could be seriously injured or killed during sudden braking or a collision.

    Do not drive with the liftgate/trunk lid open

    read more

     
    Copyright © 2022 www.toyaris4.com