SFI SYSTEM > FREEZE FRAME DATA

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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 air fuel ratio was lean or rich, as well as the 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 in the form of freeze frame data every 0.5 seconds. Using the intelligent tester, 5 separate sets of freeze frame data 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 duplicate 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.

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	Calculated 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 approximately 0.0 gm/sec.: Mass air flow meter power source circuit open VG circuit open or short If value 271.0 gm/sec. or more: E2G circuit open
Atmosphere Pressure	Atmospheric pressure	-
MAP	Intake manifold pressure	-
Coolant Temp	Engine coolant temperature	If -40°C (-40°F), sensor circuit open If 140°C (284°F), sensor circuit shorted
Intake Air	Intake air temperature	If -40°C (-40°F), sensor circuit open If 140°C (284°F), sensor circuit shorted
Ambient Temperature	Ambient temperature	-
Engine Run Time	Accumulated engine running time	-
Initial Engine Coolant Temp	Engine coolant temperature at engine start	-
Initial Intake Air Temp	Intake air temperature at engine start	-
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	-
Throttle Sensor #2 Volt %	Throttle sensor positioning #2	-
Throttle Sensor Position	Throttle sensor positioning	-
Throttle Motor DUTY	Throttle actuator	-
Throttle Position	Throttle valve opening angle	Reference: When the engine stalls, is difficult to start, or idles roughly
ISC Flow	Flow rate calculated from information from each sensor	Reference: When the engine stalls, is difficult to start, or idles roughly
ISC Position	Target valve opening angle calculated from ISC control	Reference: When the engine stalls, is difficult to start, or idles roughly
ISC Feedback Value	ISC feedback value	Reference: When the engine stalls, is difficult to start, or idles roughly
ISC Learning Value	ISC learning value	Reference: When the engine stalls, is difficult to start, or idles roughly
Electric Load Feedback Val	Electrical load feedback value	Reference: When the engine stalls, is difficult to start, or idles roughly
Air Conditioner FB Val	Air conditioner load feedback value	Reference: When the engine stalls, is difficult to start, or idles roughly
Low Revolution Control	Status of low engine speed control	Reference: When the engine stalls, is difficult to start, or idles roughly
Neutral Control	N position control status for automatic transaxle	Reference: When the engine stalls, is difficult to start, or idles roughly
N Range Status	Judgement for shift lever N position	Reference: When the engine stalls, is difficult to start, or idles roughly
Eng Stall Control FB Flow	Feedback value of intake air flow	Reference: When the engine stalls, is difficult to start, or idles roughly
Deposit Loss Flow	Deposit loss air flow rate	Reference: When the engine stalls, is difficult to start, or idles roughly
Injector (Port)	Injection period of No. 1 cylinder	-
Injection Volume (Cylinder 1)	Injection volume	-
Fuel Pump/Speed Status	Fuel pump/speed status	-
EVAP (Purge) VSV	Purge valve 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	Purge valve	-
Target Air-Fuel Ratio	Ratio compared to stoichiometric level	-
AF Lambda B1 S1	Fuel trim at air fuel ratio sensor	-
AFS Voltage B1 S1	Air fuel ratio sensor (bank 1 sensor 1) output	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 B1 S1	Air fuel ratio sensor output current	-
O2S B1 S2	Heated oxygen sensor (bank 1 sensor 2) output	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
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 value
Total FT #1	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 is used for fuel control, malfunctioning
Fuel System Status #2	Fuel system status (bank 2)	Not available
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)	Reference: When the engine stalls, is difficult to start, or idles roughly
Idle Spark Advn Ctrl #2	Ignition timing advance value (for No. 2 cylinder)	Reference: When the engine stalls, is difficult to start, or idles roughly
Idle Spark Advn Ctrl #3	Ignition timing advance value (for No. 3 cylinder)	Reference: When the engine stalls, is difficult to start, or idles roughly
Idle Spark Advn Ctrl #4	Ignition timing advance value (for No. 4 cylinder)	Reference: When the engine stalls, is difficult to start, or idles roughly
Target EGR Position	Target EGR position	-
EGR Step Position	EGR step position	-
VVT Control Status #1	VVT control status (bank 1)	-
VVT Advance Fail	Status of VVT advance fail	-
Catalyst Temp B1 S1	Estimated catalyst temperature (bank 1 sensor 1)	-
Catalyst Temp B1 S2	Estimated catalyst temperature (bank 1 sensor 2)	-
Starter Signal	Starter switch (STSW) signal	-
Power Steering Signal	Power steering signal	-
Power Steer. Sig. Record	Power steering signal (history)	Signal status usually ON until ignition switch is turned off
Neutral Position SW Signal	Clutch pedal switch signal	-
Clutch Switch*1	Clutch Switch	-
Reverse Switch*1	Reverse Switch	-
Stop Light Switch	Stop light switch	-
Shift Indication Enable*1	Shift Indication Enable	-
A/C Signal	Air conditioning signal	-
Closed Throttle Position SW	Closed throttle position switch	-
Fuel Cut Condition	Fuel cut condition	-
Immobiliser Communication	Immobiliser communication	-
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 cycles since DTCs cleared	Number of warm-up cycles since DTCs cleared
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	-
All Cylinders Misfire Count	All cylinder misfire count	-
Misfire RPM	Engine speed when misfire occurs	-
Misfire Load	Engine load when misfire occurs	-
Misfire Margin	Margin to detect engine misfire	-
Engine Starting Time	Time elapsed before engine starts (after starter turns on until engine speed reaches 400 rpm)	Reference: When the engine stalls, is difficult to start, or idles roughly
Engine Speed (Starter Off)	Engine speed when starter off	Reference: 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	Reference: When the engine stalls, is difficult to start, or idles roughly
Run Dist of Previous Trip	Distance traveled during previous trip	Reference: When the engine stalls, is difficult to start, or idles roughly
Previous Trip Coolant Temp	Coolant temperature of previous trip	Reference: When the engine stalls, is difficult to start, or idles roughly
Previous Trip Intake Temp	Intake air temperature of previous trip	Reference: When the engine stalls, is difficult to start, or idles roughly
Engine Oil Temperature	Engine oil temperature (estimated)	Reference: When the engine stalls, is difficult to start, or idles roughly
Previous Trip Eng Oil Temp	Engine oil temperature of previous trip	Reference: When the engine stalls, is difficult to start, or idles roughly
Ambient Temp for A/C	Ambient temperature	Reference: When the engine stalls, is difficult to start, or idles roughly
Previous Trip Ambient Temp	Ambient temperature of previous trip	Reference: When the engine stalls, is difficult to start, or idles roughly
Engine 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 roughly
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	Fuel cut with very light load	Fuel cut being performed with very light load to prevent incomplete engine combustion
Immobiliser Fuel Cut	Status of the immobiliser fuel cut	-
MT Down Shift Indication*1	MT Down Shift Indication	-
MT Up Shift Indication*1	MT Up Shift Indication	-
Stop and Start of Eng State*1	Stop and start of engine status	-

*1: for Manual Transaxle