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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.
Tip: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.
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These data sets can be used to duplicate 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
Label
(Tester Display)
Measurement Item Diagnostic Note Vehicle Speed Vehicle speed Speed indicated on speedometer Engine Speed Engine speed - Calculate Load Calculate load Calculated load by ECM Vehicle Load Vehicle load - MAF Mass air flow volume If value approximately 0.0 gm/s:
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Mass air flow meter sub-assembly power source circuit open
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VG circuit open or shorted
If value 271.0 gm/s:
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E2G circuit open
Atmosphere Pressure Atmospheric pressure - Coolant Temp Engine coolant temperature If value -40°C (-40°F), sensor circuit open
If value 140°C (284°F) or more, sensor circuit shorted
Intake Air Intake air temperature If value -40°C (-40°F), sensor circuit open
If value 140°C (284°F) or more, 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 % Throttle position - Throttl Sensor #2 Volt % Throttle sensor positioning #2 - Throttle Sensor Position Throttle sensor positioning - Throttle Motor DUTY Throttle actuator - Throttle Position Throttle valve opening angle When the engine stalls, is difficult to start, or idles roughly ISC Flow Flow rate calculated from information from each sensor When the engine stalls, is difficult to start, or idles roughly ISC Position Target valve opening angle calculated from ISC This is the throttle valve opening amount while the engine is idling (the throttle valve opening amount necessary to maintain ISC air flow) ISC Feedback Value ISC feedback value When the engine stalls, is difficult to start, or idles roughly ISC Learning Value ISC learning value When the engine stalls, is difficult to start, or idles roughly Electric Load Feedback Val Electrical load feedback value When the engine stalls, is difficult to start, or idles roughly Air Conditioner FB Val Air conditioner load feedback value When the engine stalls, is difficult to start, or idles roughly PS Feedback Val Power steering feedback value When the engine stalls, is difficult to start, or idles roughly Low Revolution Control Status of low engine speed control When the engine stalls, is difficult to start, or idles roughly Neutral Control Neutral control operation state When the engine stalls, is difficult to start, or idles roughly N Range Status Judgment for shift lever N position When the engine stalls, is difficult to start, or idles roughly Eng Stall Control FB Flow Feedback value of intake air flow When the engine stalls, is difficult to start, or idles roughly Deposit Loss Flow Flow loss due to deposit When the engine stalls, is difficult to start, or idles roughly Injector (Port) Fuel injector assembly - 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 Purge flow - Purge Density Learn Value Learning value of purge density - EVAP Purge VSV EVAP purge VSV - Target Air-Fuel Ratio Target air fuel ratio - 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 - AFS Voltage B2S1 Air fuel ratio sensor output - AFS Current B1S1 Air fuel ratio sensor current - AFS Current B2S1 Air fuel ratio sensor current - O2S B1S2 Heated oxygen sensor output - O2S B2S2 Heated oxygen sensor output - 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 value Total FT #1 Total fuel trim - 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 - 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 Ignition timing advance value
(for No. 1 cylinder)
When the engine stalls, is difficult to start, or idles roughly Idle Spark Advn Ctrl #2 Ignition timing advance value
(for No. 2 cylinder)
When the engine stalls, is difficult to start, or idles roughly Idle Spark Advn Ctrl #3 Ignition timing advance value
(for No. 3 cylinder)
When the engine stalls, is difficult to start, or idles roughly Idle Spark Advn Ctrl #4 Ignition timing advance value
(for No. 4 cylinder)
When the engine stalls, is difficult to start, or idles roughly Idle Spark Advn Ctrl #5 Ignition timing advance value
(for No. 5 cylinder)
When the engine stalls, is difficult to start, or idles roughly Idle Spark Advn Ctrl #6 Ignition timing advance value
(for No. 6 cylinder)
When the engine stalls, is difficult to start, or idles roughly ACIS VSV Intake air control valve assembly for acoustic control induction system - VVT Control Status #1 VVT control status (bank 1) - VVT Control Status #2 VVT control status (bank 2) - VVT Advance Fail Status of VVT advance fail - Catalyst Temp B1S1 Catalyst temperature - Catalyst Temp B2S1 Catalyst temperature - Catalyst Temp B1S2 Catalyst temperature - Catalyst Temp B2S2 Catalyst temperature - Starter Signal Starter signal - Starter Control Starter control - Power Steering Signal Power steering signal - Starter Relay Starter relay status - Power Steer. Sig. Record Power steering signal (history) Signal status usually ON until engine switch turned off ACC Relay ACC relay status - Neutral Position SW Signal Park/Neutral position switch assembly signal - Stop Light Switch Stop light switch assembly - A/C Signal A/C signal - Closed Throttle Position SW Closed throttle position switch - Fuel Cut Condition Fuel cut condition ON or OFF - Immobiliser Communication Immobiliser communication ON or OFF OFF: Communication malfunctioning, or engine immobiliser system set 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 - TC and TE1 TC and TE1 terminals of DLC3 - Ignition Trig. Count Ignition count - 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 cylinder misfire count - Misfire RPM Misfire RPM - Misfire Load Misfire load - Misfire Margin Misfire monitoring - Catalyst OT MF F/C Catalyst over temperature misfire prevention fuel cut not available - Cat OT MF F/C History Catalyst over temperature misfire prevention fuel cut history off - 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 Starting Time Engine run time
(elapsed time from engine switch ON (IG) to off)
When the engine stalls, is difficult to start, or idles roughly 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 engine switch turned from off to ON (IG) When the engine stalls, is difficult to start, or idles roughly Run Dist of Previous Trip Distance traveled during previous trip Before 5 seconds elapse after starting the engine, which is DTC P1604 (Startability Malfunction) detection duration, this parameter indicates the distance driven during the previous trip.
After 5 seconds elapse after starting the engine, this parameter indicates the distance driven during the current trip calculated from the vehicle speed signal.
Run Dist of Previous Trip in freeze frame data which were present when the startability malfunction occurred (DTC P1604 detected) indicates the distance driven during the previous trip, but in all other cases, such as for the snapshot data of Data List (real-time measurements), or for freeze frame data which were present when the DTCs other than P1604 were detected, the value indicates the distance driven during the current trip.
Previous Trip Coolant Temp Coolant temperature of previous trip When the engine stalls, is difficult to start, or idles roughly Previous Trip Intake Temp Intake temperature of previous trip When the engine stalls, is difficult to start, or idles roughly Engine Oil Temperature Engine oil temperature (estimated) When the engine stalls, is difficult to start, or idles roughly Previous Trip Eng Oil Temp Engine oil temperature of previous trip When the engine stalls, is difficult to start, or idles roughly Ambient Temp for A/C Ambient temperature When the engine stalls, is difficult to start, or idles roughly Previous Trip Ambient Temp Ambient temperature of previous trip When the engine stalls, is difficult to start, or idles roughly Engine Start Hesitation History of instance of slow engine starts When the engine stalls, is difficult to start, or idles roughly Low Rev for Eng Start History of low engine speed after engine starts When the engine stalls, is difficult to start, or idles roughly Minimum Engine Speed Minimum engine speed When the engine stalls, is difficult to start, or idles roughly Electric Fan Motor Electric fan motor (Cooling fan motor) - Idle Fuel Cut Idle fuel cut ON: when throttle valve fully closed and engine speed over 2500 rpm FC TAU FC TAU Fuel cut being performed under very light load to prevent incomplete engine combustion Immobiliser Fuel Cut Status of the immobiliser fuel cut - Received MIL from ECT MIL status from ECT - Shift Position Sig from ECT Shift position signal 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) Shift switch status (P range) - Shift SW Status (R Range) Shift switch status (R range) - Shift SW Status (N Range) Shift switch status (N range) - Sports Shift Up SW Sports shift up switch - Sports Shift Down SW Sports shift down switch - Sports Mode Selection SW Sports mode selection switch - Shift SW Status (D Range) Shift switch status (D range) - -