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 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.
HINT:
If it is impossible to duplicate the problem even though a DTC is detected, confirm the freeze frame data.
- The ECM records engine conditions as freeze frame data every 0.5 seconds. Using Techstream, five separate sets of freeze frame data, including the data values at the time when the DTC was set, can be checked.
- 3 data sets before the DTC was set.
- 1 data set when the DTC was set.
- 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 the cause of the malfunction, and in judging whether it was temporary or not.
- 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.
- 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 Calculate load Calculated load by ECM Vehicle Load Vehicle load - MAF Mass air flow volume If the value is approximately 0.0 gm/sec.: - The mass air flow meter power source circuit is opened
- The VG circuit is open or shorted
If 271.0 gm/sec. or more.:- The E2G circuit is opened
Atmosphere Pressure Atmospheric pressure - Coolant Temp Engine coolant temperature If value is -40°C (-40°F), sensor circuit open
If value is more than 135°C (275°F), sensor circuit shortedIntake Air Intake air temperature If value is -40°C (-40°F), sensor circuit open
If value is more than 128°C (262°F), sensor circuit shortedAmbient Temperature Ambient temperature - 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 (APP) No. 1 - Accel Sens. No. 2 Volt % Absolute APP No. 2 - Throttle Sensor Volt % Throttle position - Throttle Sensor #2 Volt % Throttle sensor No. 2 positioning - Throttle Sensor Position Throttle sensor positioning - Throttle Motor DUTY Throttle motor - 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 control 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 load 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 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 Deposit loss air flow rate - This value indicates the amount of compensation for a decrease in flow passage area due to the buildup of deposits on the throttle valve.
- Check this value for reference when the engine stalls, is difficult to start, or idles roughly.
- When the ISC learned value is initialized by disconnecting the battery negative terminal or removing the fuses (EFI NO. 1 and ETCS fuses), performing the following procedures in order to quickly relearn the Deposit Loss Flow value. After the Deposit Loss Flow has been relearned, gradual fine adjustments will continue automatically.
- Start the engine cold and allow the engine to idle.
- After the engine is warmed up (engine coolant temperature is above 80°C [176°F]), allow the engine to idle for an additional 5 minutes.
- Turn the ignition switch off and wait for 30 seconds.
- Start the engine again, and allow the engine to idle for 5 minutes.
Injector (Port) Injector - Injection Volume (Cylinder 1) Injection volume - Fuel Pump/Speed Status Fuel pump/speed status - Vacuum Pump Key-off EVAP system pump status - EVAP (Purge) VSV EVAP purge VSV duty ratio - EVAP Purge Flow EVAP gauge flow - Purge Density Learn Value Learning value of purge density - EVAP System Vent Valve Key-off EVAP system vent valve status - EVAP Purge VSV EVAP purge VSV - Purge Cut VSV Duty Purge cut VSV duty - Target Air-Fuel Ratio Air-fuel ratio - AF Lambda B1S1 Fuel trim at A/F sensor - AF Lambda B2S1 Fuel trim at A/F sensor - AFS Voltage B1S1 A/F sensor output voltage - AFS Voltage B2S1 A/F sensor output voltage - AFS Current B1S1 A/F sensor output current - AFS Current B2S1 A/F sensor output current - A/F Heater Duty #1 A/F heater duty ratio (for Bank 1) - A/F Heater Duty #2 A/F heater duty ratio (for Bank 2) - O2S B1S2 Heated oxygen sensor output voltage - O2S B2S2 Heated oxygen sensor output voltage - O2S Impedance B1S2 Heated oxygen sensor impedance (sensor 2) - O2S Impedance B2S2 Heated oxygen sensor impedance (sensor 2) - O2 Heater B1S2 Heated oxygen sensor heater - O2 Heater B2S2 Heated oxygen sensor heater - O2 Heater Curr Val B1S2 Heated oxygen sensor current - O2 Heater Curr Val B1S2 Heated oxygen sensor current - 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 for a continual deviation of short-term fuel trim from central valve 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 for 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) - OL (Open Loop): Has not yet satisfied conditions to go closed loop
- CL (Closed Loop): Using air fuel ratio sensor as feedback for fuel control
- OLDrive: Open loop due to driving conditions (fuel enrichment)
- OLFault: Open loop due to detected system fault
- CLFault: Closed loop but air fuel ratio sensor, which used for fuel control, malfunctioning
Fuel System Status #2 Fuel system status (Bank 2) - OL (Open Loop): Has not yet satisfied conditions to go closed loop
- CL (Closed Loop): Using air fuel ratio sensor as feedback for fuel control
- OLDrive: Open loop due to driving conditions (fuel enrichment)
- OLFault: Open loop due to detected system fault
- 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 Actuator for Acoustic control induction system - AICV VSV VSV for Air Intake Control Valve (AICV) - VVT Control Status #1 VVT control status #1 - VVT Control Status #2 VVT control status #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 switch - Starter Relay Starter relay - ACC Relay ACC relay - Neutral Position SW Signal Park/neutral position switch signal - Stop Light Switch Stop light switch assembly - 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 after DTC cleared - Warm-up Cycle Cleared DTC Warm-up cycle after DTC cleared - Dist Batt Cable Disconnect Accumulated distance from battery cable disconnected - IG OFF Elapsed Time Cumulative time after ignition switch off - TC and TE1 TC and 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 cylinder misfire count - Misfire RPM Engine speed for first misfire range - Misfire Load Engine load for first misfire range - Misfire Margin Misfire monitoring - Catalyst OT MF F/C Fuel cut to prevent catalyst from overheating during misfire - Cat OT MF F/C History History of fuel cut to prevent catalyst from overheating during misfire - 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 turned from off to ON When the engine stalls, is difficult to start, or idles roughly Run Dist of Previous Trip Distance traveled during previous trip - 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.
- 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 Engine run time (elapsed time from ignition switch ON to off) When the engine stalls, is difficult to start, or idles roughly 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 air 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 instances 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 ACM Active control mount VSV duty ratio - Electric Fan Motor Electric 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 - Communication with ECT Status of the communication with ECT - Electrical Load Signal 1 Electrical load signal - 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 - SPD (NT) Input shaft speed - ECT Lock Up ECT lock up status - Shift SW Status (P Range) Park/neutral position switch assembly status - Shift SW Status (R Range) Park/neutral position switch assembly status - Shift SW Status (N Range) Park/neutral position switch assembly status - Sports Shift Up SW Sport shift up switch status - Sports Shift Down SW Sport shift down switch status - Sports Mode Selection SW Sport mode select switch status - Shift SW Status (D Range) Park/neutral position switch assembly status -