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Home >> Mazda >> 2018 >> CX-3 Touring, AWD >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic - Engine Control System - Introduction (1 Of 2) >> On-Board Diagnostic Test >> Freeze Frame PID Data Access Procedure
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Freeze Frame PID Data Access Procedure

  1. Connect the M-MDS to the DLC-2.
  2. After the vehicle is identified, select the following items from the initialization screen of the M-MDS.
    1. Select "Self Test".
    2. Select "Modules".
    3. Select "PCM".
  3. Then, select the "Retrieve CMDTCs" and perform procedures according to directions on the M-MDS screen.
  4. Retrieve the freeze frame PID data according to the directions on the M-MDS screen.
    NOTE:
    • Freeze frame data/snapshot data appears at the top of the help screen when the displayed DTC is selected.

    Freeze frame data

    • The freeze frame data consists of data for vehicle and engine control system operation conditions when malfunctions in the engine control system are detected and stored in the PCM.
    • Freeze frame data is stored at the instant the check engine light illuminates, and only a part of the DTC data is stored.
    • For the freeze frame data, if there are several malfunctions in the engine control system, the data for the malfunction which occurred initially is stored. Thereafter, if a misfire or fuel injection control malfunction occurs, data from the misfire or fuel injection control malfunction is written over the initially stored data. However, if the initially stored freeze frame data is a misfire or fuel injection control malfunction, it is not overwritten.

      Snapshot data

    • The snapshot data stores the currently detected DTC data.
    • The recording timing for the freeze frame data/snapshot data differs depending on the number of DTC drive cycles.
      • For a DTC with a drive cycle number 1, only the malfunction determination data is recorded.
      • For a DTC with a drive cycle number 2, both the malfunction determination and undetermined data is recorded.

    Freeze frame data table

    NOTE:
    • Refer to the PID monitor table to confirm the engine control system operation status when the PCM does not store a DTC. (See PCM INSPECTION .)
    • Freeze frame data items are not displayed according to detected DTC.

    -: Not applicable

    Freeze frame data item Unit Description Corresponding PID data monitor item
    FUELSYS1 Open Loop/Closed Loop/OLDrive/OL-Fault/CL-Fault Fuel system status FUELSYS
    LOAD % Calculated engine load -
    ECT °C, °F Engine coolant temperature ECT
    SFT1 % Short term fuel trim SHRTFT1
    LFT1 % Long term fuel trim LONGFT1
    MAP KPa {MPA}, mBar {BAR}, psi, in H20 Manifold absolute pressure MAP
    RPM RPM Engine speed RPM
    VS KPH, MPH Vehicle speed VSS
    SPARKADV °(deg) Ignition timing SPARKADV
    IAT °C, °F Intake air temperature IAT
    MAF g/sec Mass airflow MAF
    TP % Throttle valve position No. 1 TP1
    RUNTM hh:mm:ss Time from engine start -
    EVAPPCT % Purge solenoid valve controlled value -
    FLI % Fuel level in fuel tank FLI
    WARMUPS - Number of warm-up cycle after DTC cleared -
    CLRDIST km, ft, mi Mileage after DTC cleared -
    FTP KPa {MPA}, mBar {BAR}, psi, in H20 Evaporative (EVAP) system vapor pressure FTP
    BARO KPa {MPA}, mBar {BAR}, psi, in H20 Barometric pressure BARO
    CATTEMP11 °C, °F Estimated catalytic converter temperature CATT11_DSD
    VPWR V Module supply voltage VPWR
    ALV % Engine load LOAD
    EQ_RAT - Target equivalence ratio (lambda) EQ_RAT11_DSD
    TP_REL % Relative throttle position TP_REL
    AAT °C, °F Ambient air temperature AAT
    TP_B % Throttle valve position No. 2 TP2
    APP_D % Accelerator pedal position No. 1 APP1
    APP_E % Accelerator pedal position No. 2 APP2
    TAC_PCT % Target throttle valve position ETC_DSD
    FUEL_TYP NONE/Gas/METH/ETH/DSL/ELEC Type of fuel currently being utilized by the vehicle -
    STSO2FT1 % Short term fuel trim (HO2S) SHRTFT12
    LGSO2FT1 % Long term fuel trim (HO2S) LONGFT12
    FRP KPa {MPA}, mBar {BAR}, psi, in H20 Fuel pressure (absolute) FUEL_PRES
    ECT1_SUP No/Yes Engine coolant temperature No. 1 support -
    ECT2_SUP No/Yes Engine coolant temperature No. 2 support -
    ECT1 °C, °F Engine coolant temperature No. 1 -
    ECT2 °C, °F Engine coolant temperature No. 2 -
    IAT11_SUP No/Yes Intake air temperature No. 1 support -
    IAT12_SUP No/Yes Intake air temperature No. 2 support -
    IAT11 °C, °F Intake air temperature No. 1 -
    IAT12 °C, °F Intake air temperature No. 2 IAT2

    Snapshot data table

    NOTE:
    • Refer to the PID monitor table to confirm the engine control system operation status when the PCM does not store a DTC. (See PCM INSPECTION .)
    • Snapshot data items are not displayed according to detected DTC.

    -: Not applicable

    Snapshot data item Unit Definition Data read/use method Corresponding PID data monitor item
    ALTT_V V Generator output voltage - ALTT V
    MIL Off/On Check engine light illumination status - MIL
    APP1 V Accelerator pedal position No. 1 - APP1
    %
    APP2 V Accelerator pedal position No. 2 - APP2
    %
    TP1 V Throttle valve position No. 1 - TP1
    %
    TP2 V Throttle valve position No. 2 - TP2
    %
    ALT_CUR_DSD A Generator current desired - -
    BATT_RES mΩ Battery inferred internal resistance - -
    TOTAL_TIME hh:mm:ss Total time The elapsed time when the PCM detected a DTC can be calculated by performing the following procedure.
    1. Verify the instrument cluster PID item TOTAL_TIME.
    2. Verify the snapshot data item TOTAL_TIME.
    3. Subtract 2 from 1.
    		 -
    TOTAL_DIST km, ft, mi Total distance The distance traveled when the PCM detected a DTC can be calculated by performing the following procedure.
    1. Verify the odometer value in the instrument cluster.
    2. Verify the snapshot data item TOTAL_DIST.
    3. Subtract 2 from 1.
    		 -
    FUELSYS OL/CL/OL-Drive/OL-Fault/CL-Fault Fuel system status - FUELSYS
    LOAD_C % Calculated engine load - -
    ECT °C, °F Engine coolant temperature - ECT
    SHRTFT1 % Short term fuel trim - SHRTFT1
    LONGFT1 % Long term fuel trim - LONGFT1
    MAP KPa {MPA}, mBar {BAR}, psi, in H20 Manifold absolute pressure - MAP
    RPM RPM Engine speed - RPM
    VSS KPH, MPH Vehicle speed - VSS
    SPARKADV °(deg) Ignition timing - SPARKADV
    IAT °C, °F Intake air temperature No. 1 - IAT
    MAF g/sec Mass airflow - MAF
    O2S12 V HO2S - O2S12
    EG_RUN_TIME hh:mm:ss Time from engine start - -
    FUEL_PRES KPa {MPA}, mBar {BAR}, psi, in H20 Fuel pressure - FUEL_PRES
    SEGRP_DSD % Target EGR valve position - -
    EVAPCP % Purge solenoid valve controlled value - -
    FLI % Fuel level in fuel tank - FLI
    CLR_CNT - Number of warm-up cycle after DTC cleared - -
    CLR_DIST km, ft, mi Mileage after DTC cleared - -
    FTP KPa {MPA}, mBar {BAR}, psi, in H20 Fuel tank pressure - FTP
    BARO KPa {MPA}, mBar {BAR}, psi, in H20 Barometric pressure - BARO
    CATT11_DSD °C, °F Estimated catalytic converter temperature - CATT11_DSD
    VPWR V Module supply voltage - VPWR
    LOAD % Engine load - LOAD
    EQ_RAT11_DSD - Target equivalence ratio (lambda) - EQ_RAT11_DSD
    TP_REL % Relative throttle position - TP_REL
    AAT °C, °F Ambient air temperature - AAT
    ETC_DSD % Target throttle valve position - ETC_DSD
    FUEL_TYP NONE/Gas/METH/ETH/DSL/ELEC Type of fuel currently being utilized by the vehicle - -
    SHRTFT12 % Short term fuel trim (HO2S) - SHRTFT12
    LONGFT12 % Long term fuel trim (HO2S) - LONGFT12
    FRP KPa {MPA}, mBar {BAR}, psi, in H20 Fuel pressure (absolute) - FUEL_PRES
    ECT2_SUP No/Yes Engine coolant temperature No. 2 support - -
    ECT2 °C, °F Engine coolant temperature No. 2 - -
    IAT12 °C, °F Intake air temperature No. 2 - IAT2
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