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 be helpful in determining whether the vehicle was moving or stationary, whether the engine was warmed up or not, as well as other data recorded at the time of a malfunction.

      Tech Tips

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


    • A01CIMSE18

      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 set.

      • 1 data set when the DTC was set.

      • 1 data set after the DTC was set.


      • 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
    Target Idle Engine Speed Target idle engine speed -
    Engine Speed Engine speed -
    Calculate Load Calculated load Calculated load by ECM
    MAF Mass air flow volume

    If approximately 0.0 gm/sec:


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

    • VG circuit is open or shorted

    If 160.0 gm/sec or more:


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

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

    If 140°C (284°F), sensor circuit is shorted
    Intake Air Intake 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 -40°C (-40°F), sensor circuit is open

    If 190°C (374°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 Position calculated by ECM
    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 -
    Diesel Throttle Learn Status Diesel throttle learn status -
    Throttle Sensor Volt % Throttle position sensor output voltage -
    Throttle Motor DUTY Throttle actuator -
    Injection Volume Injection volume -
    Inj. FB Vol. for Idle Injection volume feedback value for idle speed control -
    Inj Vol Feedback Learning Injection volume feedback learning value -
    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 period -
    Pilot 2 Injection Period Pilot 2 injection period -
    Main Injection Period Main injection period -
    After Injection period Post injection period -
    Pilot 1 Injection Timing Pilot 1 injection timing -
    Pilot 2 Injection Timing Pilot 2 injection timing -
    Main Injection Timing Main injection timing -
    After Injection Timing Post injection timing -
    Injector Memory Error EEPROM malfunction for injector compensation code -
    Target Common Rail Pressure Target common rail pressure -
    Fuel Press Fuel pressure -
    Fuel Temperature Fuel temperature -
    Fuel Return Temp Fuel return temperature Temperature estimated by ECM
    Target Pump SCV Current Pump current target final value -
    Pump SCV Learning Value Pump current learned value -
    Target EGR Position Target EGR valve position -
    EGR Initial Step Position EGR initial step position -
    Actual EGR Valve Pos. Actual EGR valve position -
    EGR Close Lrn. Status EGR valve fully closed position learning status -
    EGR Operation Prohibit EGR operation prohibition -
    Target Booster Pressure Target booster pressure -
    VN Turbo Command VN turbo command -
    Actual VN Position Actual VN turbo position -
    Exhaust Temperature B1S1 Exhaust temperature sensor for bank 1 sensor 1

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

    If 1000°C (1832°F), sensor circuit is shorted
    Exhaust Temperature B1S2 Exhaust temperature sensor for bank 1 sensor 2

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

    If 1000°C (1832°F), sensor circuit is shorted
    DPF Differential Pressure DPF differential pressure -
    Catalyst Differential Press Standardized DPF differential pressure -
    DPF PM Block Particulate matter block -
    PM Accumulation Ratio PM accumulation ratio -
    Catalyst Regeneration Switch DPF switch -
    Exhaust Brake Switch Exhaust brake main switch -
    Starter Signal Starter signal -
    IG SW Ignition switch -
    Neutral Position SW Signal Neutral position switch signal -
    Clutch Switch Clutch switch -
    Reverse Switch Reverse switch -
    Stop Light Switch Stop light switch -
    A/C Signal Air conditioning signal -
    Engine Stop SW Engine stop switch -
    Immobiliser Communication Immobiliser communication -
    Engine Oil Pressure SW Engine oil pressure switch -
    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 -
    TC and TE1 TC and TE1 terminals of DLC3 -
    Engine Start Time - -
    Engine Speed (Starter Off) - -
    Starter Count - -
    Run Dist of Previous Trip - -
    Glow Request Lighting Time Glow request lighting time -
    IG-ON Time Ignition switch ON time before engine start -
    MAF Low Mass air flow low -
    Boost Pressure Low Boost pressure low -
    Common Rail Pressure Low Common rail pressure low -
    Engine Coolant Temp High Engine coolant temperature high -
    MAF/Estimate MAF Ratio Indicates the ratio of estimated intake air volume and the actual intake air volume -
    PTO Switch Power take-off switch -
    PTO Switch for Fire Engine Status of the PTO Switch for Fire Engine -
    ACT VSV Air conditioning cut operation -
    Immobiliser Fuel Cut History Status of the immobiliser fuel cut history -
    Warning for Water in Fuel Status of the Warning for Water in Fuel -