СИСТЕМА ECD ДАННЫЕ ФИКСИРОВАННОГО НАБОРА ПАРАМЕТРОВ

  1. DESCRIPTION

    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, and other data from the time of a malfunction.

    Tip:

    If it is impossible to duplicate the problem even though a DTC is detected, confirm the freeze frame data.

    • The ECM records engine conditions in the form of freeze frame data every 0.5 seconds. Using an GTS, 5 separate sets of freeze frame data can be checked.

      A012L2ME01
      Table 1.
      *1 DTC stored
      *2 0.5 seconds
      *3 Freeze frame data recorded
      • 3 data sets before the DTC was stored.

      • 1 data set when the DTC was stored.

      • 1 data set after the DTC was stored.

    • These data sets can be used to simulate the condition of the vehicle around the time of the occurrence of the malfunction. The data may assist in identifying the cause of the malfunction, and in judging whether it was temporary or not.

  2. LIST OF FREEZE FRAME DATA

    Powertrain > Engine and ECT
    Tester DisplayMeasurement ItemDiagnostic Note
    Vehicle SpeedVehicle speedSpeed indicated on speedometer
    Engine SpeedEngine speed-
    Calculate LoadCalculated loadCalculated load by ECM
    MAFMass air flow volume

    If approximately 0.0 gm/sec:

    • Mass air flow meter power source circuit is open or shorted

    • VG circuit is open or shorted

    If 130 gm/sec or more:

    • EVG circuit is open

    Atmosphere PressureAtmosphere pressure-
    MAPAbsolute pressure inside intake manifold-
    Coolant TempEngine coolant temperature

    If -30°C (-22°F) or less, sensor circuit is open

    If 120°C (248°F) or higher, sensor circuit is shorted

    Intake AirIntake air temperature

    If -40°C (-40°F), sensor circuit is open

    If 140°C (284°F), sensor circuit is shorted

    Intake Air Temp (Turbo)Intake air temperature after intercooler

    If -30°C (-22°F) or less, sensor circuit is open

    If 149°C (300°F) or higher, sensor circuit is shorted

    Engine Run TimeAccumulated engine running time-
    Initial Engine Coolant TempEngine coolant temperature at engine start-
    Initial Intake Air TempIntake air temperature at engine start-
    Battery VoltageBattery voltage-
    Pre GlowPre glow operation-
    After GlowAfter glow operation-
    Eng Oil Press Switch ValveEngine oil pressure switching valve status-
    Engine Oil PressureEngine oil pressure-
    Accel PositionAccelerator pedal position sensor-
    Accel Sens. No.1 Volt %Accelerator pedal position No. 1-
    Accel Sens. No.2 Volt %Accelerator pedal position No. 2-
    Target Throttle PositionTarget throttle position-
    Actual Throttle PositionActual throttle position-
    Diesel Throttle Learn StatusDiesel throttle learning history
    • If the system is functioning properly, learning will be performed when the ignition switch is turned from ON to off.

    • NG indicates that the foreign object may be lodged in the throttle valve or actuator components, or an open/short exists in the signal wires.

    Throttle Sensor Volt %Throttle position sensor output voltage-
    Throttle Motor DUTYThrottle actuator duty-
    Injection VolumeInjection volume-
    Injection Feedback Val #1Injection volume correction for No. 1 cylinder-
    Injection Feedback Val #2Injection volume correction for No. 2 cylinder-
    Injection Feedback Val #3Injection volume correction for No. 3 cylinder-
    Injection Feedback Val #4Injection volume correction for No. 4 cylinder-
    Pilot 1 Injection PeriodPilot 1 injection period-
    Pilot 2 Injection PeriodPilot 2 injection period-
    Main Injection PeriodMain injection period-
    After Injection PeriodAfter injection period-
    Pilot 1 Injection TimingPilot 1 injection timing-
    Pilot 2 Injection TimingPilot 2 injection timing-
    Main Injection TimingMain injection timing-
    After Injection TimingAfter injection timing-
    Target Common Rail PressureTarget common rail pressure-
    Fuel PressFuel pressure-
    Fuel TemperatureFuel temperature-
    Target Pump SCV CurrentPump current target final value-
    Pressure Discharge ValvePressure control valve operation signal-
    AF Lambda B1S1Lambda equivalent ratio-
    AFS Voltage B1S1Air fuel ratio sensor output voltage-
    AFS Current B1S1Air fuel ratio sensor output current-
    Target EGR PositionTarget EGR valve position-
    Actual EGR Valve Pos.Actual EGR valve position-
    EGR Motor Duty #1EGR valve motor duty ratio-
    EGR Close Lrn. Val.EGR valve fully closed position learned value-
    EGR Close Lrn. StatusEGR valve fully closed position learning status
    • OK indicates the fully closed position learning has completed normally.

    • NG indicates the learned fully closed position may be outside of the normal range.

    • NG indicates there may be foreign matter stuck in the valve.

    HINT: After disconnecting and reconnecting the battery cable, if the ignition switch has not been turned off once, learning may not be completed.

    EGR Operation ProhibitEGR Active Test operation prohibit-
    EGR Cooler Bypass VSVEGR cooler bypass valve VSV operation-
    EGR Cooler Bypass PositionEGR cooler bypass valve position-
    Target Booster PressureTarget boost pressure-
    VN Turbo CommandVN turbo command value-
    Actual VN PositionActual VN turbo positionThe actual VN turbo position is controlled to reach the target (VN turbo command).
    VN Position Sensor OutNozzle vane position sensor output voltage-
    VN Motor DutyVN turbocharger motor dutyIf the vanes do not move smoothly or are stuck, the difference between the target (VN turbo command) and actual value will become larger, resulting a larger VN motor duty.
    VN Close Learn ValueVN turbocharger closed learning value-
    VN Close Learn StatusVN turbo fully closed learning statusIf the VN close status learning has not completed, the correct status may not be output.
    Exhaust Temperature B1S1Exhaust gas temperature of CCo catalyst

    If 20°C (68°F), sensor circuit is open

    If 900°C (1652°F), sensor circuit is shorted

    Exhaust Temperature B1S2Exhaust gas temperature of DPF catalyst

    If 20°C (68°F), sensor circuit is open

    If 900°C (1652°F), sensor circuit is shorted

    DPF Differential PressureDPF differential pressure sensor output-
    PM Accumulation RatioPM accumulation ratio-
    Starter SignalStarter signal-
    Neutral Position SW SignalPark/neutral position switch signal-
    Clutch SwitchClutch switch-
    Reverse SwitchBack-up light switch-
    Stop Light SwitchStop light switch-
    Shift Indication EnableShift indication enable-
    A/C SignalAir conditioner signal-
    Immobiliser CommunicationImmobiliser communication-
    Electrical Load SignalElectrical load signal-
    Engine Oil Volume (Overfill)Status of the engine oil volume (Overfill)-
    Time after DTC ClearedCumulative time after DTC cleared-
    Distance from DTC ClearedAccumulated distance after DTC cleared-
    Warmup Cycle Cleared DTCWarm-up cycle after DTC cleared-
    Engine Start TimeEngine start timeTime necessary for the engine to start.
    Engine Speed (Starter Off)Engine speed when starter offThis is the engine speed immediately after starting the engine.
    Glow Request Lighting TimeIndicates the length of time the glow indicator light was on-
    IG-ON TimeElapsed time to start engine after the ignition switch was turned to ONThis shows the condition when the glow turn on request occurred. If a malfunction occurred during a cold engine start (below 0°C [32°F]), based on IG-ON Time it can be determined whether the request was made after the glow plug and glow indicator turned off or not.
    MAF LowStatus of mass air flow rate low

    This shows that the intake air volume measured by the mass air flow meter was insufficient, resulting in a continuous reduction of injection volume.

    If the intake system is clogged, the pipes are not properly connected, intake air volume is low due to excessive EGR, or the mass air flow meter has deteriorated, the measured intake air volume may be lower than the normal volume.

    Boost Pressure LowStatus of boost pressure lowThis shows that the boost pressure (turbocharger boost pressure) was less than the target, resulting in a continuous reduction of injection volume.
    Engine Coolant Temp HighStatus of engine coolant temperature highThis shows that there was a continuous reduction of injection volume due to high engine coolant temperature (overheating).
    MAF/Estimate MAF RatioMass air flow rate (actual) / mass air flow rate (estimated) valueThis shows the calculated intake air volume based on the intake air volume measured by the mass air flow meter, manifold pressure and intake air temperature.
    Rough Idle #1Status of No. 1 cylinder rough idleThis shows that the idle speed of this cylinder is lower than the other cylinder.
    Rough Idle #2Status of No. 2 cylinder rough idleThis shows that the idle speed of this cylinder is lower than the other cylinder.
    Rough Idle #3Status of No. 3 cylinder rough idleThis shows that the idle speed of this cylinder is lower than the other cylinder.
    Rough Idle #4Status of No. 4 cylinder rough idleThis shows that the idle speed of this cylinder is lower than the other cylinder.
    ACT VSVA/C cut status for Active Test-
    Electric Fan MotorElectric fan motor operation-
    Immobiliser Fuel Cut HistoryStatus of immobiliser fuel cutIf this item was ON when DTC P1604 was detected, this means that the engine could not start due to immobiliser operation.
    Stop&Start of Eng StateEngine status of stop and start system-