ECD SYSTEM FREEZE FRAME DATA


  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 the malfunction occurred.

    Tech Tips

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


    • A0117BHE42

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


      • 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

    Tester Display Measurement Item Diagnostic Note
    Vehicle Speed Vehicle speed Speed indicated on speedometer
    Engine Speed Engine speed -
    Calculate Load Calculated load Calculated load by ECM
    MAF Mass air flow volume

    If approximately 0.0 g/sec.:


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

    • VG circuit is open or shorted

    If 200 g/sec. or more:


    • E2G circuit is open
    Atmosphere Pressure Atmosphere pressure -
    MAP Absolute pressure inside intake manifold -
    Coolant Temp Engine coolant temperature

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

    If 120°C (248°F) or more, sensor circuit is shorted
    Intake Air Intake air temperature

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

    If 140°C (284°F) or more, sensor circuit is shorted
    Intake Air Temp (Turbo) Intake air temperature after intercooler

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

    If 149°C (300°F) or more, sensor circuit is shorted
    Engine Run Time Accumulated engine running time -
    Initial Engine Coolant Temp Engine coolant temperature at engine start -
    Initial Intake Air Temp Intake air temperature at engine start -
    Battery Voltage Battery voltage -
    Pre Glow Pre glow operation -
    After Glow After glow operation -
    Accel Position Accelerator pedal position sensor -
    Accel Sens. No.1 Volt % Accelerator pedal position No. 1 output voltage -
    Accel Sens. No.2 Volt % Accelerator pedal position No. 2 output voltage -
    Target Throttle Position Target throttle position -
    Actual Throttle Position Actual throttle position -
    Throttle Sensor Volt % Throttle position sensor output voltage -
    Throttle Motor DUTY Throttle actuator -
    Injection Volume Injection volume -
    Inj. FB Vol. for Idle Injection feedback value for idle speed control -
    Injection Feedback Val #1 Injection volume correction for cylinder 1 -
    Injection Feedback Val #2 Injection volume correction for cylinder 2 -
    Injection Feedback Val #3 Injection volume correction for cylinder 3 -
    Injection Feedback Val #4 Injection volume correction for cylinder 4 -
    Pilot 1 Injection Period Pilot 1 injection -
    Pilot 2 Injection Period Pilot 2 injection -
    Main Injection Period Main injection -
    After Injection period Post injection -
    Pilot 1 Injection Timing Pilot 1 injection -
    Pilot 2 Injection Timing Pilot 2 injection -
    Main Injection Timing Main injection -
    After Injection Timing Post injection -
    Injector Memory Error EEPROM malfunction for injector -
    Fuel Press Fuel pressure -
    Fuel Temperature Fuel temperature -
    Target Pump SCV Current Pump current target final value -
    Pump SCV Learning Value Pump current learning value -
    AF Lambda B1S1 Lambda equivalent ratio -
    AFS Voltage B1S1 Air fuel ratio sensor output voltage -
    AFS Current B1S1 Air fuel ratio sensor output current -
    Target EGR Position Target EGR valve position -
    Actual EGR Valve Pos. Actual EGR valve position -
    EGR Operation Prohibit EGR Active Test operation prohibit -
    Target Booster Pressure Target booster pressure -
    VN Turbo Command VN turbo command -
    Exhaust Temperature B1S1 Exhaust temperature sensor for B1S1

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

    If 900°C (1652°F) or more, sensor circuit is shorted
    Exhaust Temperature B1S2 Exhaust temperature sensor for B1S2

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

    If 900°C (1652°F) or more, sensor circuit is shorted
    DPF Differential Pressure DPF differential pressure sensor output -
    Catalyst Differential Press Standardized DPF differential pressure -
    DPF No Activate DPF operation -
    DPF PM Block DPF PM block -
    Starter Signal Starter signal -
    Starter Control Starter control -
    Starter Relay Starter relay -
    ACC Relay ACC Relay -
    Neutral Position SW Signal Park/neutral position SW signal -
    Clutch Switch Clutch switch -
    Stop Light Switch Stop light switch -
    A/C Signal Air conditioning signal -
    Immobiliser Communication Immobiliser communication -
    Electrical Load Signal Electrical load signal -
    Time after DTC Cleared Cumulative time after DTC cleared -
    Distance from DTC Cleared Accumulated distance after DTC cleared -
    Warmup Cycle Cleared DTC Warm-up cycle after DTC cleared -
    ACT VSV A/C cut status for Active Test -
    Electric Fan Motor Electric fan motor -