ECD SYSTEM (w/o DPF) FREEZE FRAME DATA
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DESCRIPTION
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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 air fuel ratio was lean or rich, as well as the other data recorded at the time of a malfunction.
Tech Tips
If it is impossible to duplicate the problem even though a DTC is stored, confirm the freeze frame data.
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The ECM records engine conditions in the form of freeze frame data every 0.5 seconds. Using the intelligent tester, 5 separate sets of freeze frame data can be checked.
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3 data sets from before the DTC was stored
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1 data set from when the DTC was stored
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1 data set from after the DTC was stored
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These data sets can be used to simulate the condition of the vehicle from 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.
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LIST OF FREEZE FRAME DATA
Tester Display Measurement Item Diagnostic Note Vehicle Speed Vehicle speed The speed indicated on the speedometer. Engine Speed Engine speed - Calculate Load Calculated load The load calculated by the ECM. MAF Mass air flow volume If approximately 0.0 g/sec.:
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The mass air flow meter power source circuit is open or shorted.
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The VG circuit is open or shorted.
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The E2G circuit is open.
Atmosphere Pressure Atmospheric pressure - MAP Absolute pressure inside intake manifold - Coolant Temp Engine coolant temperature If -40°C (-40°F), the sensor circuit is open.
If 140°C (284°F) or higher, the sensor circuit is shorted.
Intake Air Intake air temperature If -40°C (-40°F), the sensor circuit is open.
If 140°C (284°F) or higher, the sensor circuit is shorted.
Intake Air Temp (Turbo) Intake air temperature after intercooler If -40°C (-40°F), the sensor circuit is open.
If 190°C (374°F) or higher, the sensor circuit is shorted.
Radiator Coolant Temp Engine coolant temperature (radiator side) If -40°C (-40°F), the sensor circuit is open.
If 190°C (374°F) or higher, the 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 - Diesel Throttle Learn Status Diesel throttle learning status - 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 - Inj Vol Feedback Learning Injection volume feedback learned 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 State of injector related EEPROM information stored in ECM - Reju Pilot Quantity Learning Pilot quantity learning prohibition - Pilot Quantity Learning Pilot quantity learning status - Fuel Press Fuel pressure - Fuel Temperature Fuel temperature - Fuel Return Temp Fuel return temperature - Target Pump SCV Current Final pump current target value - Pressure Discharge Valve Pressure discharge valve operation prohibition - Target EGR Position Target EGR valve position - Actual EGR Valve Pos. Actual EGR valve position - EGR Lift Sensor Volt % EGR Lift sensor output voltage - EGR Close Lrn. Val. EGR valve fully closed position learned value - 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 - Starter Signal Starter signal - Neutral Position SW Signal Neutral position switch signal - Clutch Switch Clutch switch - Stop Light Switch Stop light switch - A/C Signal Air conditioning signal - Immobiliser Communication Immobiliser communication - Time after DTC Cleared Cumulative time after DTC cleared - Distance from DTC Cleared Accumulated distance after DTC cleared - Warmup Cycle Cleared DTC Warmup cycles 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 - - Electric Duty Feedback Value - - A/C Duty Feedback Value - - PS Duty Feedback Value - - Idle Injection Volume (Min) - - Swirl Control Valve VSV VSV for swirl control valve - Electric Fan Motor Electric fan motor - Received MIL from ECT MIL status from ECT - Shift Position Sig from ECT Shift position from ECT - A/T Oil Temp from ECT ATF temperature from ECT - SPD (NO) Output shaft speed - ECT Lock Up ECT lock-up status - A/T Oil Temperature 1 ATF temperature sensor value - -