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 stored, can be checked.
- 3 data sets before the DTC was stored.
- 1 data set when the DTC was stored.
- 1 data set after the DTC was stored.
- 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 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
Tester Display Measurement Item Diagnostic Note Vehicle Speed Vehicle speed Speed indicated on speedometer Engine Speed Engine speed - Calculate Load Calculated load by ECM - Vehicle Load Vehicle Load Load percentage in terms of maximum intake air flow amount MAF Air flow rate from Mass Air Flow (MAF) meter If value approximately 0.0 gm/s: - MAF meter power source circuit open
- VG circuit open or short
If value 160.0 gm/s or more:- E2G circuit open
Atmosphere Pressure Atmospheric pressure - Coolant Temp Engine coolant temperature - If value -40°C (-40°F): sensor circuit open
- If value 135°C (275°F) or higher: sensor circuit shorted
Intake Air Intake air temperature - If value -40°C (-40°F): sensor circuit open
- If value 128°C (262°F) or higher: sensor circuit shorted
Engine Run Time Engine run time - Initial Engine Coolant Temp Initial engine coolant temperature Service data Initial Intake Air Temp Initial intake air temperature Service data Battery Voltage Battery voltage - Accel Sens. No. 1 Volt % Accelerator pedal position No. 1 - Accel Sens. No. 2 Volt % Accelerator pedal position No. 2 - Throttle Sensor Volt % Throttle valve opening percentage according to throttle position sensor Value calculated based on the voltage at terminal VTA1 Throttl Sensor #2 Volt % Throttle valve opening percentage according to throttle position sensor No. 2 Value calculated based on the voltage at terminal VTA2 Throttle Sensor Position Throttle position sensor Recognition value for throttle opening angle on ECM Throttle Motor DUTY Throttle actuator ETCS service data Throttle Position Throttle valve opening angle Reference:
When the engine stalls, is difficult to start, or idles roughlyISC Flow Flow rate calculated from information from each sensor Reference:
When the engine stalls, is difficult to start, or idles roughlyISC Position Target valve opening angle calculated from ISC control Reference:
When the engine stalls, is difficult to start, or idles roughlyISC Feedback Value ISC feedback value Reference:
When the engine stalls, is difficult to start, or idles roughlyISC Learning Value ISC learning value Reference:
When the engine stalls, is difficult to start, or idles roughlyElectric Load Feedback Val Electrical load feedback value Reference:
When the engine stalls, is difficult to start, or idles roughlyAir Conditioner FB Val Air conditioner load feedback value Reference:
When the engine stalls, is difficult to start, or idles roughlyPS Feedback Val Power steering load feedback value Reference:
When the engine stalls, is difficult to start, or idles roughlyLow Revolution Control Status of low engine speed control Reference:
When the engine stalls, is difficult to start, or idles roughlyNeutral Control N position control status for automatic transmission Reference:
When the engine stalls, is difficult to start, or idles roughlyN Range Status*2 Judgement for shift lever in N Reference:
When the engine stalls, is difficult to start, or idles roughlyEng Stall Control FB Flow Feedback value of intake air flow Reference:
When the engine stalls, is difficult to start, or idles roughlyDeposit Loss Flow Deposit loss air flow rate Reference:
When the engine stalls, is difficult to start, or idles roughlyInjector (Port) Injection period of No. 1 cylinder - Injection Volum (Cylinder1) Injection volume (Cylinder 1) Quantity of fuel injection volume for 10 times Fuel Pump/Speed Status Fuel pump/status - Vacuum Pump Key-off EVAP system leak detection pump status - EVAP (Purge) VSV EVAP (Purge) VSV control duty Command signal from ECM Evap Purge Flow Ratio of evaporative purge flow to intake air volume Service data Purge Density Learn Value Learning value of purge density Service data EVAP System Vent Valve Key-off EVAP system vent valve status - EVAP Purge VSV VSV status for EVAP control - Purge Cut VSV Duty Purge cut VSV duty - Target Air-Fuel Ratio Ratio compared to stoichiometric level - AF Lambda B1S1 Short-term fuel trim associated with bank 1 sensor 1 - AFS Voltage B1S1 A/F sensor output voltage for bank 1 sensor 1 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 AFS Current B1S1 Air fuel ratio sensor output current for bank 1 sensor 1 Value becomes higher when fuel-cut executed under high engine speed A/F Heater Duty #1 A/F heater duty ratio (for Bank 1) - O2S B1S2 Heated oxygen sensor output voltage for bank 1 sensor 2 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 (bank 1 sensor 2) - O2 Heater B1S2 Heated oxygen sensor heater (for Bank 1 Sensor 2) - O2 Heater Curr Val B1S2 Heated oxygen sensor current (for Bank 1 Sensor 2) - Short FT #1 Short-term fuel trim of bank 1 Short-term fuel compensation used to maintain air-fuel ratio at stoichiometric air-fuel ratio Long FT #1 Long-term fuel trim of bank 1 Overall fuel compensation carried out in long-term to compensate for continual deviation of short-term fuel trim from central value Total FT #1 Total fuel trim of bank 1
Average value for fuel trim system of bank 1- 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 is used for fuel control, is malfunctioning
Fuel System Status #2 Fuel system status (bank 2) IGN Advance Ignition timing advance for No. 1 cylinder - Knock Feedback Value Feedback value of knocking Service data Knock Correct Learn Value Correction learning value of knocking Service data Idle Spark Advn Ctrl #1 Ignition timing advance value (for No. 1 cylinder) Reference:
When the engine stalls, is difficult to start, or idles roughlyIdle Spark Advn Ctrl #2 Ignition timing advance value (for No. 2 cylinder) Reference:
When the engine stalls, is difficult to start, or idles roughlyIdle Spark Advn Ctrl #3 Ignition timing advance value (for No. 3 cylinder) Reference:
When the engine stalls, is difficult to start, or idles roughlyIdle Spark Advn Ctrl #4 Ignition timing advance value (for No. 4 cylinder) Reference:
When the engine stalls, is difficult to start, or idles roughlyVVT Control Status #1 VVT control (bank 1) status - VVT Advance Fail Status of VVT advance fail - Catalyst Temp B1S1 Catalyst temperature (associated sensor 1) - Catalyst Temp B1S2 Catalyst temperature (associated sensor 2) - Starter Signal Starter signal (STA terminal input status) - Power Steering Signal Power steering signal - Neutral Position SW Signal*2 Park/neutral position switch status for automatic transmission - Clutch Switch*1 Clutch Switch - Stop Light Switch Stop light switch status - A/C Signal A/C switch status - Idle Up Signal Idle up signal status - Closed Throttle Position SW Closed throttle position switch - Fuel Cut Condition Fuel-cut condition - Immobiliser Communication Immobiliser communication OFF: Communication malfunctioning, or engine immobiliser system set
ON: Communication normalTC Terminal TC terminal status - Time after DTC Cleared Time since DTCs cleared - Distance from DTC Cleared Distance traveled since DTCs cleared - Warmup Cycle Cleared DTC Warm-up cycles since DTCs cleared Number of warm-up cycles since DTCs cleared Dist Batt Cable Disconnect Distance 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 to calculated misfire count - Cylinder #1 Misfire Count Misfire count of cylinder 1 - Cylinder #2 Misfire Count Misfire count of cylinder 2 - Cylinder #3 Misfire Count Misfire count of cylinder 3 - Cylinder #4 Misfire Count Misfire count of cylinder 4 - All Cylinders Misfire Count All cylinders misfire count - Misfire RPM Average of engine speed when misfire occurs - Misfire Load Average of engine load when misfire occurred - Misfire Margin Margin to detect engine misfire When the variation in the engine speed is large and exceeds the misfire detection threshold, the misfire count starts. Misfire margin is a measure of how much the engine speed variation can increase with respect to the threshold before the engine is determined to be misfiring.
A large value means there is a large margin for the engine speed to vary before the engine is determined to be misfiring.Catalyst OT MF F/C Catalyst overheat misfire prevention fuel cut function availability Service data Cat OT MF F/C History Catalyst overheat misfire prevention fuel cut function history Service data 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) - Engine Speed (Starter Off) Engine speed when starter off Reference:
When the engine stalls, is difficult to start, or idles roughlyStarter Count Number of times starter turned on after ignition switch turned from off to ON Reference:
When the engine stalls, is difficult to start, or idles roughlyRun Dist of Previous Trip Distance traveled during previous trip Reference:
When the engine stalls, is difficult to start, or idles roughlyEngine Starting Time Engine run time (elapsed time from ignition switch ON to off) Reference:
When the engine stalls, is difficult to start, or idles roughlyPrevious Trip Coolant Temp Coolant temperature of previous trip Reference:
When the engine stalls, is difficult to start, or idles roughlyPrevious Trip Intake Temp Intake air Coolant temperature of previous trip Reference:
When the engine stalls, is difficult to start, or idles roughlyEngine Oil Temperature Engine oil temperature (estimated) Reference:
When the engine stalls, is difficult to start, or idles roughlyPrevious Trip Eng Oil Temp Engine oil temperature of previous trip (estimated) Reference:
When the engine stalls, is difficult to start, or idles roughlyAmbient Temp for A/C Ambient temperature Reference:
When the engine stalls, is difficult to start, or idles roughlyPrevious Trip Ambient Temp Ambient temperature of previous trip Reference:
When the engine stalls, is difficult to start, or idles roughlyEngine Start Hesitation History of instances of slow engine starts - Low Rev for Eng Start History of low engine speed after engine starts - Minimum Engine Speed Minimum engine speed Reference:
When the engine stalls, is difficult to start, or idles roughlyElectric Fan Motor Electric cooling fan motor - Idle Fuel Cut Fuel cut idle Idle Fuel Cut = "ON" when throttle valve fully closed and engine speed over 2800 rpm FC TAU Fuel cut 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 the immobiliser fuel cut - Electrical Load Signal 1 Electrical load signal (ELS1 terminal input) - Electrical Load Signal 3 Electrical load signal (ELS3 terminal input) - SPD (NT)*2 Input shaft speed - SPD (NC)*2 Counter gear speed - Shift SW Status (P Range)*2 PNP switch status When shift lever position displayed on Techstream differs from actual position, adjustment of PNP switch or shift cable may be incorrect Shift SW Status (R Range)*2 PNP switch status When shift lever position displayed on Techstream differs from actual position, adjustment of PNP switch or shift cable may be incorrect Shift SW Status (N Range)*2 PNP switch status When shift lever position displayed on Techstream differs from actual position, adjustment of PNP switch or shift cable may be incorrect Sports Shift Up SW*2 Sport shift up switch status - Sports Shift Down SW*2 Sport shift down switch status - Sports Mode Selection SW*2 Sport mode select switch status - Shift SW Status (D Range)*2 PNP switch status When shift lever position displayed on Techstream differs from actual position, adjustment of PNP switch or shift cable may be incorrect A/T Oil Temperature 1*2 No. 1 ATF temperature sensor value If value is -40°C (-40°F) or "150°C (302°F) or more", ATF temperature sensor circuit is open or shorted. Lock Up*2 Lock-up status - Shift Status*2 ECM gear shift command - SLT Solenoid Status*2 Shift solenoid SLT status - DSL Solenoid Status*2 Lock-up solenoid status - AT Fluid*2 Flex lock-up judder judgment - *1: for M/T Models
*2: for A/T Models