SFI SYSTEM 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 running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, 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.
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The ECM records engine conditions in the form of freeze frame data every 0.5 seconds. Using the intelligent tester, five separate sets of freeze frame data, including the data values at the time when the DTC was set, can be checked.
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3 data sets before the DTC was set
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1 data set when the DTC was set
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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 of 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 Speed indicated on speedometer Engine Speed Engine speed - Calculate Load Calculated load Calculated load by ECM Vehicle Load Vehicle load - MAF Mass air flow volume If approximately 0.0 g/sec.:
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Mass air flow meter sub-assembly power source circuit open or shorted
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VG circuit open or shorted
If 271.0 g/sec. or more:
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E2G circuit open
Atmosphere Pressure Atmosphere pressure - Coolant Temp Engine coolant temperature If value -40°C (-40°F), sensor circuit open
If value 140°C (284°F), sensor circuit shorted
Intake Air Intake air temperature If value -40°C (-40°F), sensor circuit open
If value 140°C (284°F), sensor circuit shorted
Engine Run Time Accumulated engine running time - Initial Engine Coolant Temp Initial engine coolant temperature - Initial Intake Air Temp Initial intake air temperature - Battery Voltage Battery voltage - Accel Sens. No. 1 Volt % Absolute accelerator pedal position No. 1 - Accel Sens. No. 2 Volt % Absolute accelerator pedal position No. 2 - Throttle Sensor Volt % Absolute throttle position No. 1 - Throttl Sensor #2 Volt % Absolute throttle sensor positioning No. 2 - Throttle Sensor Position Throttle sensor positioning - Throttle Motor DUTY Throttle actuator - Throttle Position Throttle position When the engine stalls, is difficult to start, or idles roughly ISC Flow Flow rate calculated using information from each sensor When the engine stalls, is difficult to start, or idles roughly ISC Position Requested opening amount calculated using ISC When the engine stalls, is difficult to start, or idles roughly ISC Feedback Value ISC feedback compensation amount When the engine stalls, is difficult to start, or idles roughly ISC Learning Value ISC learned compensation amount When the engine stalls, is difficult to start, or idles roughly Electric Load Feedback Val Compensation flow rate according to electrical load When the engine stalls, is difficult to start, or idles roughly Air Conditioner FB Val Compensation flow rate according to air conditioner load When the engine stalls, is difficult to start, or idles roughly Low Revolution Control Low engine speed control operation state When the engine stalls, is difficult to start, or idles roughly N Range Status Shift lever N status When the engine stalls, is difficult to start, or idles roughly Eng Stall Control FB Flow Intake air compensation flow rate When the engine stalls, is difficult to start, or idles roughly Deposit Loss Flow Flow loss due to deposits When the engine stalls, is difficult to start, or idles roughly Injector (Port) Injection period of No. 1 cylinder - Injection Volum (Cylinder 1) Injection volume - Fuel Pump Speed Control Fuel pump speed control status - Fuel Pump/Speed Status Fuel pump/speed status - EVAP (Purge) VSV EVAP purge VSV duty ratio - Evap Purge Flow Ratio of evaporative purge flow to intake air volume - Purge Density Learn Value Learning value of purge density - EVAP Purge VSV EVAP Purge VSV - Purge Cut VSV Duty Purge cut VSV duty - Target Air-Fuel Ratio Ratio compared to stoichiometric level - AF Lambda B1S1 Fuel trim at air fuel ratio sensor - AF Lambda B2S1 Fuel trim at air fuel ratio sensor - AFS Voltage B1S1 Air fuel ratio sensor output voltage - AFS voltage B2S1 Air fuel ratio sensor output voltage - AFS Current B1S1 Air fuel ratio sensor current - AFS Current B2S1 Air fuel ratio sensor current - A/F Heater Duty #1 Air fuel ratio sensor heater duty ratio (bank 1 sensor 1) - A/F Heater Duty #2 Air fuel ratio sensor heater duty ratio (bank 2 sensor 1) - O2S B1S2 Heated oxygen sensor output voltage - O2S B2S2 Heated oxygen sensor output voltage - O2 Heater B1S2 Heated oxygen sensor heater (bank 1 sensor 2) - O2 Heater B2S2 Heated oxygen sensor heater (bank 2 sensor 2) - O2 Heater Curr Val B1S2 Heated oxygen sensor current (bank 1 sensor 2) - O2 Heater Curr Val B2S2 Heated oxygen sensor current (bank 2 sensor 2) - Short FT #1 Short-term fuel trim Short-term fuel compensation used to maintain air-fuel ratio at stoichiometric air fuel ratio Long FT #1 Long-term fuel trim Overall fuel compensation carried out in long-term to compensate a continual deviation of short-term fuel trim from central valve Total FT #1 Total fuel trim (bank 1) - Short FT #2 Short-term fuel trim Short-term fuel compensation used to maintain air fuel ratio at stoichiometric air fuel ratio Long FT #2 Long-term fuel trim Overall fuel compensation carried out in long-term to compensate a continual deviation of short-term fuel trim from central valve Total FT #2 Total fuel trim (bank 2) - Fuel System Status #1 Fuel system status (bank 1)
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OL (Open Loop): Has not yet satisfied conditions to go closed loop
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CL (Closed Loop): Using air fuel ratio sensor as feedback for fuel control
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OLDrive: Open loop due to driving conditions (fuel enrichment)
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OLFault: Open loop due to detected system fault
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CLFault: Closed loop but air fuel ratio sensor, which used for fuel control, malfunctioning
Fuel System Status #2 Fuel system status (bank 2)
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OL (Open Loop): Has not yet satisfied conditions to go closed loop
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CL (Closed Loop): Using air fuel ratio sensor as feedback for fuel control
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OLDrive: Open loop due to driving conditions (fuel enrichment)
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OLFault: Open loop due to detected system fault
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CLFault: Closed loop but air fuel ratio sensor, which used for fuel control, malfunctioning
IGN Advance Ignition advance - Knock Feedback Value Feedback value of knocking - Knock Correct Learn Value Correction learning value of knocking - Idle Spark Advn Ctrl #1 Individual cylinder timing advance compensation amount (No. 1) When the engine stalls, is difficult to start, or idles roughly Idle Spark Advn Ctrl #2 Individual cylinder timing advance compensation amount (No. 2) When the engine stalls, is difficult to start, or idles roughly Idle Spark Advn Ctrl #3 Individual cylinder timing advance compensation amount (No. 3) When the engine stalls, is difficult to start, or idles roughly Idle Spark Advn Ctrl #4 Individual cylinder timing advance compensation amount (No. 4) When the engine stalls, is difficult to start, or idles roughly Idle Spark Advn Ctrl #5 Individual cylinder timing advance compensation amount (No. 5) When the engine stalls, is difficult to start, or idles roughly Idle Spark Advn Ctrl #6 Individual cylinder timing advance compensation amount (No. 6) When the engine stalls, is difficult to start, or idles roughly ACIS VSV Intake air control valve for Acoustic Control Induction System (ACIS) - AICV VSV VSV for air intake control valve - Actual VVT Angle #1 Actual VVT angle (bank 1) - Actual VVT Angle #2 Actual VVT angle (bank 2) - Actual VVT Ex Angle #1 Actual exhaust VVT angle (bank 1) - Actual VVT Ex Angle #2 Actual exhaust VVT angle (bank 2) - VVT Control Status #1 VVT control status (bank 1) - VVT Control Status #2 VVT control status (bank 2) - VVT Advance Fail VVT control failure status - Catalyst Temp B1S1 Estimated catalyst temperature (bank 1 sensor 1) - Catalyst Temp B2S1 Estimated catalyst temperature (bank 2 sensor 1) - Catalyst Temp B1S2 Estimated catalyst temperature (bank 1 sensor 2) - Catalyst Temp B2S2 Estimated catalyst temperature (bank 2 sensor 2) - Starter Signal Starter signal - Starter Control Starter status - Power Steering Signal Power steering switch - Starter Relay Starter relay status - ACC Relay ACC relay status - Neutral Position SW Signal Park/neutral position switch signal - Stop Light Switch Stop light switch - A/C Signal A/C signal - Idle Up Signal Idle up signal - Closed Throttle Position SW Closed throttle position switch - Fuel Cut Condition Fuel cut condition - Immobiliser Communication Immobiliser communication - TC Terminal TC terminal status - Time after DTC Cleared Cumulative time after DTC cleared - Distance from DTC Cleared Accumulated distance from DTC cleared - Warmup Cycle Cleared DTC Warm-up cycle after DTC cleared - Dist Batt Cable Disconnect Total distance vehicle driven after battery cable disconnected - IG OFF Elapsed Time Time after ignition switch off - TC and TE1 TC and CG (TE1) terminals of DLC3 - Ignition Trig. Count Ignition counter - Cylinder #1 Misfire Count Cylinder #1 misfire count - Cylinder #2 Misfire Count Cylinder #2 misfire count - Cylinder #3 Misfire Count Cylinder #3 misfire count - Cylinder #4 Misfire Count Cylinder #4 misfire count - Cylinder #5 Misfire Count Cylinder #5 misfire count - Cylinder #6 Misfire Count Cylinder #6 misfire count - All Cylinders Misfire Count All cylinders misfire - Misfire RPM Engine speed when misfire occurred - Misfire Load Engine load when misfire occurred - Misfire Margin Margin to detect engine misfire - Catalyst OT MF F/C Fuel cut to prevent catalyst from overheating during misfire - Cat OT MF F/C History Catalyst Over Temp Misfire prevention F/C History - Cat OT MF F/C Cylinder #1 Display of fuel cut operation in No. 1 cylinder (if certain level of misfire malfunction is detected) - Cat OT MF F/C Cylinder #2 Display of fuel cut operation in No. 2 cylinder (if certain level of misfire malfunction is detected) - Cat OT MF F/C Cylinder #3 Display of fuel cut operation in No. 3 cylinder (if certain level of misfire malfunction is detected) - Cat OT MF F/C Cylinder #4 Display of fuel cut operation in No. 4 cylinder (if certain level of misfire malfunction is detected) - Cat OT MF F/C Cylinder #5 Display of fuel cut operation in No. 5 cylinder (if certain level of misfire malfunction is detected) - Cat OT MF F/C Cylinder #6 Display of fuel cut operation in No. 6 cylinder (if certain level of misfire malfunction is detected) - Engine Speed (Starter Off) Engine speed when starter off When the engine stalls, is difficult to start, or idles roughly Starter Count Number of times starter turned on after ignition switch on (IG) When the engine stalls, is difficult to start, or idles roughly Run Dist of Previous Trip Distance driven during previous trip
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Run Dist of Previous Trip continues to display the distance traveled in the previous trip during the detection period of DTC P1604, which ends 5 seconds after the engine starts.
Then the previous trip distance will be cleared and the distance traveled during this trip, which is calculated based on the vehicle speed, will be displayed.
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When the engine is difficult to start and DTC P1604 is stored, Run Dist of Previous Trip will continue to be displayed.
When inspecting for DTCs other than P1604, or when taking a snapshot, the distance traveled during this trip will be displayed.
Engine Starting Time Time elapsed after engine started (interval between ignition switch on (IG) and off) When the engine stalls, is difficult to start, or idles roughly Previous Trip Coolant Temp Engine coolant temperature during previous trip When the engine stalls, is difficult to start, or idles roughly Previous Trip Intake Temp Intake air temperature during previous trip When the engine stalls, is difficult to start, or idles roughly. Engine Oil Temperature Engine oil temperature (estimated temperature) When the engine stalls, is difficult to start, or idles roughly Previous Trip Eng Oil Temp Engine oil temperature during previous trip When the engine stalls, is difficult to start, or idles roughly Ambient Temp for A/C Ambient temperature for A/C When the engine stalls, is difficult to start, or idles roughly Previous Trip Ambient Temp Ambient temperature during previous trip When the engine stalls, is difficult to start, or idles roughly Engine Start Hesitation History of hesitation during engine start - Low Rev for Eng Start History of low engine speed after engine start - Minimum Engine Speed Minimum engine speed When the engine stalls, is difficult to start, or idles roughly Fuel Cut Elaps Time Elapsed time since fuel cut due to high engine speed - A/F Learn Value Idle #1 Air fuel ratio learn value of idle area (bank 1) - A/F Learn Value Low #1 Air fuel ratio learn value of low load area (bank 1) - A/F Learn Value Mid1 #1 Air fuel ratio learn value of middle1 load area (bank 1) - A/F Learn Value Mid2 #1 Air fuel ratio learn value of middle2 load area (bank 1) - A/F Learn Value High #1 Air fuel ratio learn value of high load area (bank 1) - A/F Learn Value Idle #2 Air fuel ratio learn value of idle area (bank 2) - A/F Learn Value Low #2 Air fuel ratio learn value of low load area (bank 2) - A/F Learn Value Mid1 #2 Air fuel ratio learn value of middle1 load area (bank 2) - A/F Learn Value Mid2 #2 Air fuel ratio learn value of middle2 load area (bank 2) - A/F Learn Value High #2 Air fuel ratio learn value of high load area (bank 2) - ACM Inhibit ACM inhibit - ACM ACM control status - Idle Fuel Cut Fuel cut idle ON: when throttle valve fully closed and engine speed over 1400 rpm FC TAU Fuel cut during very light load Fuel cut being performed under very light load to prevent engine combustion from becoming incomplete Immobiliser Fuel Cut Status of immobiliser fuel cut - Immobiliser Fuel Cut History Status of immobiliser fuel cut history - Electrical Load Signal1 Electrical load signal - Electrical Load Signal2 Electrical load signal - -