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 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 replicate the problem even though a DTC is detected, confirm the freeze frame data.
- The ECM records engine conditions in the form of freeze frame data every 0.5 seconds. Using the Techstream, five separate sets of freeze frame data, including the data values at the time when the DTC was set, can be checked.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- 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 of 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 moving or stationary, 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
LABEL
(Tester Display)Measure Item/Range 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 Load percentage in terms of maximum intake air flow amount MAF Mass air flow volume If value approximately 0.0 gm/sec.: - Mass air flow meter power source circuit open or short
- VG circuit open or short
If value 160.0 gm/sec. or more:- E2G circuit open
MAF #1 Mass air for volume (bank 1) - MAF #2 Mass air for volume (bank 2) - Atmosphere Pressure Atmospheric pressure - Coolant Temp Engine coolant temperature If value -40°C (-40°F), sensor circuit open
If value 140°C (258°F), sensor circuit shortedIntake Air Intake air temperature If value -40°C (-40°F), sensor circuit open
If value 140°C (258°F), sensor circuit shortedIntake Air #1 Intake air temperature (bank 1) - Intake Air #2 Intake air temperature (bank 2) - Ambient 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 % Accelerator Pedal Position (APP) No. 1 - Accel Sens. No. 2 Volt % APP No. 2 - Throttle Sensor Volt % Throttle sensor positioning
Absolute throttle positionRead value with engine switch on (IG) (Do not start engine) Throttl Sensor #2 Volt % Absolute throttle sensor positioning #2 Read value with engine switch on (IG) (Do not start engine) Throttle Sensor Position Throttle sensor positioning - Throttle Motor DUTY Throttle actuator - Throttle Position Throttle position For use when engine stall, starting problems or rough idle is present ISC Flow Flow rate calculated using information from each sensor For use when engine stall, starting problems or rough idle is present ISC Position Requested opening amount calculated using ISC control For use when engine stall, starting problems or rough idle is present ISC Feedback Value ISC feedback compensation amount For use when engine stall, starting problems or rough idle is present ISC Learning Value ISC learned compensation amount For use when engine stall, starting problems or rough idle is present Electric Load Feedback Val Compensation flow rate according to electrical load For use when engine stall, starting problems or rough idle is present Air Conditioner FB Val Compensation flow rate according to air conditioner load For use when engine stall, starting problems or rough idle is present Low Revolution Control Low engine speed control operation state For use when engine stall, starting problems or rough idle is present Neutral Control Neutral control operation state For use when engine stall, starting problems or rough idle is present Eng Stall Control FB Flow Intake air compensation flow rate For use when engine stall, starting problems or rough idle is present Deposit Loss Flow Flow loss due to deposits For use when engine stall, starting problems or rough idle is present Fuel Press Fuel Pressure - Injector (Port) Port injector - Injection Volum (Cylinder 1) Injection volume - Fuel Pump Speed Control F/PMP relay status - Fuel Pump/Speed Status Fuel pump/speed status - Vacuum Pump Key-off EVAP system pump status - Fuel Pressure Target Value Target fuel pressure - Fuel Pump Duty (D4) Fuel pump duty (D4) (bank 1) - Fuel Pump2 Duty (D4) Fuel pump duty (D4) (bank 2) - HP FP Discharge Rate High pressure fuel pump discharge rate (bank 1) - HP FP Discharge Rate 2 High pressure fuel pump discharge rate (bank 2) - Injection Way Injection mode - Injection Switching Status Prohibition of changing the D-4S injection method - Injection Timing (D4) Injection timing (D4) - Injection Time (D4) Injection time (D4) - EVAP (Purge) VSV EVAP purge VSV duty ratio - Evap Purge Flow Purge flow - Purge Destiny Learn Value Learning value of purge density - EVAP System Vent Value Key-off EVAP system vent valve status - EVAP Purge VSV Purge VSV VSV for EVAP controlled by ECM (ground side duty control) Purge Cut VSV Duty Purge cut VSV duty - Target Air-Fuel Ratio Air-fuel ratio - AF Lambda B1 S1 Fuel trim at A/F sensor - AF Lambda B2 S1 Fuel trim at A/F sensor - AF Voltage B1 S1 A/F sensor output voltage Performing Control the Injection Volume or Control the Injection Volume for A/F sensor function of Active Test enables technician to check output voltage of sensor AF Voltage B2 S1 A/F sensor output voltage Performing Control the Injection Volume or Control the Injection Volume for A/F sensor function of Active Test enables technician to check output voltage of sensor AF Current B1 S1 A/F sensor output current - AF Current B2 S1 A/F sensor output current - A/F Heater Duty #1 A/F heater duty ratio (bank 1) - A/F Heater Duty #2 A/F heater duty ratio (bank 2) - O2S B1 S2 Heated oxygen sensor output voltage Performing Control the Injection Volume or Control the Injection Volume for A/F sensor function of Active Test enables technician to check output voltage of sensor O2S B2 S2 Heated oxygen sensor output voltage Performing Control the Injection Volume or Control the Injection Volume for A/F sensor function of Active Test enables technician to check output voltage of sensor O2S Impedance B1S2 Sub heated oxygen sensor impedance - O2S Impedance B2S2 Sub heated oxygen sensor impedance - 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 B2S2 Heated oxygen sensor current - Short FT #1 Short-term fuel trim (bank 1) Short-term fuel compensation used to maintain air-fuel ratio at stoichiometric air-fuel ratio Long FT #1 Long-term fuel trim (bank 1) 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 (bank 2) Short-term fuel compensation used to maintain air-fuel ratio at stoichiometric air-fuel ratio Long FT #2 Long-term fuel trim (bank 2) 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) - OL (Open Loop): Has not yet satisfied conditions to go closed loop
- CL (Closed Loop): Using heated oxygen 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 heated oxygen 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 heated oxygen 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 heated oxygen 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) For use when engine stall, starting problems or rough idle is present Idle Spark Advn Ctrl #2 Individual cylinder timing advance compensation amount (No. 2) For use when engine stall, starting problems or rough idle is present Idle Spark Advn Ctrl #3 Individual cylinder timing advance compensation amount (No. 3) For use when engine stall, starting problems or rough idle is present Idle Spark Advn Ctrl #4 Individual cylinder timing advance compensation amount (No. 4) For use when engine stall, starting problems or rough idle is present Idle Spark Advn Ctrl #5 Individual cylinder timing advance compensation amount (No. 5) For use when engine stall, starting problems or rough idle is present Idle Spark Advn Ctrl #6 Individual cylinder timing advance compensation amount (No. 6) For use when engine stall, starting problems or rough idle is present Idle Spark Advn Ctrl #7 Individual cylinder timing advance compensation amount (No. 7) For use when engine stall, starting problems or rough idle is present Idle Spark Advn Ctrl #8 Individual cylinder timing advance compensation amount (No. 8) For use when engine stall, starting problems or rough idle is present ACIS VSV ACIS VSV status - ACIS Motor Duty ACIS motor duty - VVT Advance Fail VVT control failure status - Catalyst Temp B1 S1 Catalyst temperature - Catalyst Temp B2 S1 Catalyst temperature - Catalyst Temp B1 S2 Catalyst temperature - Catalyst Temp B2 S2 Catalyst temperature - Starter Signal Starter signal - Starter Control Starter control - Starter Relay ST relay status - ACC Relay ACC relay status - Neutral Position SW Signal Park/neutral position (PNP) switch signal - Stop Light Switch Stop light switch status - A/C Signal A/C switch status - 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 - 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 Cumulative time after engine 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 - Cylinder #7 Misfire Count Cylinder #7 misfire count - Cylinder #8 Misfire Count Cylinder #8 misfire count - All Cylinders Misfire Count All cylinders misfire count - Multi Cylinders Misfire Count Multiple cylinder misfire count - 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 Catalyst over temperature misfire prevention F/C - Cat OT MF F/C History Catalyst over temperature misfire prevention F/C history - Cat OT MF F/C Cylinder #1 Display of fuel cut operation in No. 2 cylinder (if certain level of misfire malfunction is detected) - Cat OT MF F/C Cylinder #2 Display of fuel cut operation in No. 1 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) - Cat OT MF F/C Cylinder #7 Display of fuel cut operation in No. 7 cylinder (if certain level of misfire malfunction is detected) - Cat OT MF F/C Cylinder #8 Display of fuel cut operation in No. 8 cylinder (if certain level of misfire malfunction is detected) - Engine Speed (Starter Off) Engine speed when starter off For use when engine stall, starting problems or rough idle is present Starter Count Number of times starter turned on after engine switch turned on (IG) For use when engine stall, starting problems or rough idle is present Run Dist of Previous Trip Distance driven during previous trip For use when engine stall, starting problems or rough idle is present Engine Starting Time Time elapsed after engine started (interval between engine switch on (IG) and off) For use when engine stall, starting problems or rough idle is present Previous Trip Coolant Temp Engine coolant temperature during previous trip For use when engine stall, starting problems or rough idle is present Previous Trip Intake Temp Intake air temperature during previous trip For use when engine stall, starting problems or rough idle is present Engine Oil Temperature Engine oil temperature (estimated temperature) For use when engine stall, starting problems or rough idle is present Previous Trip Eng Oil Temp Engine oil temperature during previous trip For use when engine stall, starting problems or rough idle is present Ambient Temp for A/C Ambient temperature For use when engine stall, starting problems or rough idle is present Previous Trip Ambient Temp Ambient temperature during previous trip For use when engine stall, starting problems or rough idle is present 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 For use when engine stall, starting problems or rough idle is present Electric Fan Motor Fan motor status - Idle Fuel Cut Prohibit Idle fuel cut ON: when throttle valve fully closed and engine speed over 1500 rpm Idle Fuel Cut Idle fuel cut ON: when throttle valve fully closed and engine speed over 1500 rpm FC TAU FC TAU Fuel cut being performed under very light load to prevent engine combustion from becoming incomplete Immobiliser Fuel Cut Status of immobiliser fuel cut - Communication with ECT Status of communication with ECT - Electrical Load Signal 1 Electrical load signal - Key Unlock Signal Key unlock signal status - 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 - SPD (NT) Input shaft speed - ECT Lock Up ECT lock up status - Shift SW Status (P Range) Park/neutral position switch status - Pattern Switch (PWR/M) Pattern switch (PWR) status - Shift SW Status (R Range) Park/neutral position switch status - Shift SW Status (N Range) Park/neutral position switch 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 status - Snow or 2nd Start Mode Pattern switch (ECT SNOW) status - Shift Control Mode Shift control mode status -