ECD SYSTEM FREEZE FRAME DATA
-
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 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.
-
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 from before the DTC was stored
-
1 data set from when the DTC was stored
-
1 data set from after the DTC was stored
-
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.
-
-
LIST OF FREEZE FRAME DATA
Tester Display Measurement Item Diagnostic Note Vehicle Speed Vehicle speed The speed indicated on the speedometer. Target Idle Engine Speed Target idling speed - Engine Speed Engine speed - Calculate Load Calculated load The load calculated by the ECM. MAF Mass air flow volume If approximately 0.0 gm/s:
-
The mass air flow meter power source circuit is open or shorted.
-
The VG circuit is open or shorted.
-
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.
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 - Glow Indicator Supported Glow indicator supported - Glow Indicator Glow indicator - 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 This item is used for troubleshooting when DTC P062F is stored. Reju Pilot Quantity Learning Pilot quantity learning prohibition The status is only displayed while performing "Pilot Quantity Learning". Pilot Quantity Learning Pilot quantity learning status The status is only displayed while performing "Pilot Quantity Learning". Target Common Rail Pressure Target common rail pressure - Fuel Press Fuel pressure - Fuel Temperature Fuel temperature - Fuel Return Temp Fuel return temperature - Target Pump SCV Current Final pump current target value - Pump SCV Learning Value Pump current learned value - Pressure Discharge Valve Pressure discharge valve operation prohibition - 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 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 - EGR Operation Prohibit EGR operation prohibition - EGR Cooler Bypass VSV Vacuum switching valve (for EGR bypass valve) status - EGR Cooler Bypass Position EGR cooler bypass position - Target Booster Pressure Target booster pressure - VN Turbo Command VN turbo command - Exhaust Temperature B1S1 Supported Status of the exhaust gas temperature B1S1 Supported - Exhaust Temperature B1S1 Exhaust gas temperature sensor (B1S1) If -40°C (-40°F), sensor circuit is open
If 1000°C (1832°F) or more, sensor circuit is shorted
Exhaust Temperature B1S2 Supported Status of the exhaust gas temperature B1S2 Supported - Exhaust Temperature B1S2 Exhaust gas temperature sensor (B1S2) If -40°C (-40°F), sensor circuit is open
If 1000°C (1832°F) or more, sensor circuit is shorted
Exhaust Temperature B1S3 Supported Status of the exhaust gas temperature B1S3 Supported If this item displays "Unsupp", a fixed value is displayed for "Exhaust Temperature", as exhaust gas temperature sensors are not equipped on the vehicle. Exhaust Temperature B1S3 - - DPF Differential Pressure DPF differential pressure - Catalyst Differential Press Standardized DPF differential pressure - Exhaust Fuel Addition FB Exhaust fuel addition correction value - DPF Thermal Deteriorate DPF thermal deterioration - DPF No Activate DPF operation - DPF PM Block DPF PM block - Catalyst Memory Error EEPROM malfunction for catalyst This item is used for troubleshooting when DTC P062F is stored. Sulfur Accumulation Ratio Sulfur accumulation ratio - PM Accumulation Ratio PM accumulation ratio - Starter Signal Starter signal - Neutral Position SW Signal Neutral position switch signal - Clutch Switch Clutch switch - Reverse Switch Reverse switch - Stop Light Switch Stop light switch - Shift Indication Enable Shift indication enable - 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 - This item is used for troubleshooting when DTC P1604 is stored. Engine Speed (Starter Off) - This item is used for troubleshooting when DTC P1604 is stored. Starter Count - This item is used for troubleshooting when DTC P1604 is stored. Run Dist of Previous Trip - This item is used for troubleshooting when DTC P1604 is stored. Glow Request Lighting Time Glow request lighting time This item is used for troubleshooting when DTC P1604 is stored. IG-ON Time Ignition switch ON time before engine start This item is used for troubleshooting when DTC P1604 is stored. MAF Low Mass air flow low This item is used for troubleshooting when DTC P1608 is stored. Boost Pressure Low Boost pressure low This item is used for troubleshooting when DTC P1608 is stored. Common Rail Pressure Low Common rail pressure low This item is used for troubleshooting when DTC P1608 is stored. Engine Coolant Temp High Engine coolant temperature high This item is used for troubleshooting when DTC P1608 is stored. MAF/Estimate MAF Ratio Indicates the ratio of estimated intake air volume and the actual intake air volume This item is used for troubleshooting when DTC P1608 is stored. Rough Idle #1 Rough idle status of cylinder 1 This item is used for troubleshooting when DTC P1605 is stored. Rough Idle #2 Rough idle status of cylinder 2 This item is used for troubleshooting when DTC P1605 is stored. Rough Idle #3 Rough idle status of cylinder 3 This item is used for troubleshooting when DTC P1605 is stored. Rough Idle #4 Rough idle status of cylinder 4 This item is used for troubleshooting when DTC P1605 is stored. Electric Duty Feedback Value - - A/C Duty Feedback Value - - PS Duty Feedback Value - - Idle Injection Volume (Min) Idle minimum injection volume - Electric Fan Motor Electric fan motors operation status - Immobiliser Fuel Cut History Status of the immobiliser fuel cut history - 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 - Shift SW Status (P Range) Park/neutral position switch status - Kick Down Switch Status Kick down switch status - Pattern Switch (PWR/M) Pattern select switch (SPORT) status - Shift SW Status (R Range) Park/neutral position switch status - Shift SW Status (N Range) Park/neutral position switch status - Shift SW Status (N,P Range) Supported Status of shift switch supported - Shift SW Status (N,P Range) Shift Switch Status - Sports Shift Up SW Sports shift up switch status - Sports Shift Down SW Sports shift down switch status - Sports Mode Selection SW Sports mode select switch status - Shift SW Status (D Range) Park/neutral position switch status - A/T Oil Temperature 1 ATF temperature sensor value - MT Down Shift Indication Manual transaxle down shift indicator status - MT Up Shift Indication Manual transaxle up shift indicator status - -