SFI SYSTEM, Diagnostic DTC:P010014

DTC Code DTC Name
P010014 Mass or Volume Air Flow Sensor "A" Circuit Short to Ground or Open

DESCRIPTION

Refer to DTC P010012.

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Tip:

When P010014 is stored, the ECM enters fail-safe mode. During fail-safe mode, boost prohibited and the ignition timing is calculated by the ECM, according to the engine speed and throttle valve position. Fail-safe mode continues until a pass condition is detected, and the ignition switch is then turned off.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P010014

Mass or Volume Air Flow Sensor "A" Circuit Short to Ground or Open

The mass air flow meter sub-assembly voltage is less than 0.2 V for 3 seconds or more (1 trip detection logic).

  • Open or short in mass air flow meter sub-assembly circuit

  • Mass air flow meter sub-assembly

  • ECM

Comes on

DTC stored

SAE Code: P0102
Tip:

When this DTC is output, check the mass air flow in the Data List. Enter the following menus: Powertrain / Engine / Data List / All Data / Mass Air Flow Sensor.

DTC No.

Mass Air Flow Sensor

Malfunction

P010014

0.0 gm/sec

  • Open in mass air flow meter sub-assembly power source circuit

  • Open in VG circuit

  • Short to ground in VG circuit

If the Data List values is normal it may be due to a temporary recovery from the malfunction condition. Check for intermittent problems.

MONITOR DESCRIPTION

If there is a defect or an open or short circuit in the mass air flow meter sub-assembly, the voltage level deviates from the normal operating range. The ECM interprets this deviation as a malfunction in the mass air flow meter sub-assembly circuit and stores this DTC.

Example:

When the sensor output voltage remains less than 0.2 V for 3 seconds or more, the ECM stores this DTC.

MONITOR STRATEGY

Frequency of Operation

Continuous

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.

    Tip:

    • 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: P010014.

  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 memory limit
    Tip:

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

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

    • If the judgment result shows INCOMPLETE or N/A, perform the Confirmation Driving Pattern and check the DTC judgment result again.

WIRING DIAGRAM

Refer to DTC P010012.

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CAUTION / NOTICE / HINT

Note:

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

Tip:

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 TERMINAL VOLTAGE (POWER SOURCE OF MASS AIR FLOW METER SUB-ASSEMBLY)

    A194097C61

    *a

    Front view of wire harness connector

    (to Mass Air Flow Meter Sub-assembly)

    1. Disconnect the mass air flow meter sub-assembly connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      B2-1 (+B) - Body ground

      Ignition switch ON

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI-MAIN RELAY - MASS AIR FLOW METER SUB-ASSEMBLY)

    OK

  2. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM)

    1. Disconnect the mass air flow meter sub-assembly connector.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      B2-3 (VG) - B208-92 (VG)

      Always

      Below 1 Ω

      B2-3 (VG) or B208-92 (VG) - Body ground and other terminals

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY

    1. Inspect the mass air flow meter sub-assembly, referring to the On-vehicle Inspection for Mass Air Flow Meter.

      Click here

    2. Inspect the mass air flow meter sub-assembly, referring to the Inspection for Mass Air Flow Meter.

      Click here

    3. Inspect the function of the mass air flow meter sub-assembly.

      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 / Engine / Data List / All Data / Mass Air Flow Sensor.

        Powertrain > Engine > Data List

        Tester Display

        Mass Air Flow Sensor

      5. Start the engine.

      6. Check that the Mass Air Flow Sensor value changes when the engine is raced.

        OK

        The reading changes.

        Tip:

        Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.

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    Result

    Proceed to

    OK

    NG
    OK

    REPLACE ECM

    Click hereClick here

    NG

    REPLACE MASS AIR FLOW METER SUB-ASSEMBLY

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