ECD SYSTEM(w/o Glow Plug Controller) 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 of a malfunction.

    Tip:

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

    • A286045E01

      The ECM records engine conditions in the form of freeze frame data every 0.5 seconds. Using the GTS, 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

    Powertrain > Engine and ECT

    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 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 Pressure

    Atmosphere pressure

    -

    MAP

    Absolute pressure inside intake manifold

    -

    Coolant Temp

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

    If 149°C (300°F) or higher, 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

    -

    Eng Oil Press Switch Valve

    Engine oil pressure switching valve status

    -

    Engine Oil Pressure

    Engine oil pressure

    -

    Accel Position

    Accelerator 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 Position

    Target throttle position

    -

    Actual Throttle Position

    Actual throttle position

    -

    Diesel Throttle Learn Status

    Diesel 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 DUTY

    Throttle actuator duty

    -

    Injection Volume

    Injection volume

    -

    Injection Feedback Val #1

    Injection volume correction for No. 1 cylinder

    -

    Injection Feedback Val #2

    Injection volume correction for No. 2 cylinder

    -

    Injection Feedback Val #3

    Injection volume correction for No. 3 cylinder

    -

    Injection Feedback Val #4

    Injection volume correction for No. 4 cylinder

    -

    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

    After 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

    After injection timing

    -

    Target Common Rail Pressure

    Target common rail pressure

    -

    Fuel Press

    Fuel pressure

    -

    Fuel Temperature

    Fuel temperature

    -

    Target Pump SCV Current

    Pump current target final value

    -

    Pressure Discharge Valve

    Pressure control valve operation signal

    -

    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 Motor Duty #1

    EGR valve motor duty ratio

    -

    EGR Close Lrn. Val.

    EGR valve fully closed position learned value

    -

    EGR Close Lrn. Status

    EGR 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 Prohibit

    EGR Active Test operation prohibit

    -

    EGR Cooler Bypass VSV

    EGR cooler bypass valve VSV operation

    -

    EGR Cooler Bypass Position

    EGR cooler bypass valve position

    -

    Target Booster Pressure

    Target boost pressure

    -

    VN Turbo Command

    VN turbo command value

    -

    Actual VN Position

    Actual VN turbo position

    The actual VN turbo position is controlled to reach the target (VN turbo command).

    VN Position Sensor Out

    Nozzle vane position sensor output voltage

    -

    VN Motor Duty

    VN turbocharger motor duty

    If 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 Value

    VN turbocharger closed learning value

    -

    VN Close Learn Status

    VN turbo fully closed learning status

    If the VN close status learning has not completed, the correct status may not be output.

    Exhaust Temperature B1S1

    Exhaust 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 B1S2

    Exhaust 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 Pressure

    DPF differential pressure sensor output

    -

    PM Accumulation Ratio

    PM accumulation ratio

    -

    Starter Signal

    Starter signal

    -

    Neutral Position SW Signal

    Park/neutral position switch signal

    -

    Clutch Switch

    Clutch switch

    -

    Reverse Switch

    Back-up light switch

    -

    Stop Light Switch

    Stop light switch

    -

    Shift Indication Enable

    Shift indication enable

    -

    A/C Signal

    Air conditioner 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

    -

    Engine Start Time

    Engine start time

    Time necessary for the engine to start.

    Engine Speed (Starter Off)

    Engine speed when starter off

    This is the engine speed immediately after starting the engine.

    Glow Request Lighting Time

    Indicates the length of time the glow indicator light was on

    -

    IG-ON Time

    Elapsed time to start engine after the ignition switch was turned to ON

    This 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 Low

    Status 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 Low

    Status of boost pressure low

    This shows that the boost pressure (turbocharger boost pressure) was less than the target, resulting in a continuous reduction of injection volume.

    Engine Coolant Temp High

    Status of engine coolant temperature high

    This shows that there was a continuous reduction of injection volume due to high engine coolant temperature (overheating).

    MAF/Estimate MAF Ratio

    Mass air flow rate (actual) / mass air flow rate (estimated) value

    This 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 #1

    Status of No. 1 cylinder rough idle

    This shows that the idle speed of this cylinder is lower than the other cylinder.

    Rough Idle #2

    Status of No. 2 cylinder rough idle

    This shows that the idle speed of this cylinder is lower than the other cylinder.

    Rough Idle #3

    Status of No. 3 cylinder rough idle

    This shows that the idle speed of this cylinder is lower than the other cylinder.

    Rough Idle #4

    Status of No. 4 cylinder rough idle

    This shows that the idle speed of this cylinder is lower than the other cylinder.

    ACT VSV

    A/C cut status for Active Test

    -

    Electric Fan Motor

    Electric fan motor operation

    -

    Immobiliser Fuel Cut History

    Status of immobiliser fuel cut

    If this item was ON when DTC P1604 was detected, this means that the engine could not start due to immobiliser operation.