ECD 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 help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

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 an intelligent tester, 5 separate sets of freeze frame data 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.

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	Calculated load by ECM
MAF	Mass air flow volume	If approximately 0.0 g/sec.: Mass air flow meter power source circuit is open or shorted VG circuit is open or shorted If 200 g/sec. or more: E2G circuit is open
Atmosphere Pressure	Atmosphere pressure	-
MAP	Absolute pressure inside intake manifold	-
Coolant Temp	Engine coolant temperature	If -30°C (-22°F), sensor circuit is open If 120°C (248°F) or more, sensor circuit is shorted
Intake Air	Intake air temperature	If -40°C (-40°F), sensor circuit is open If 140°C (284°F) or more, sensor circuit is shorted
Intake Air Temp (Turbo)	Intake air temperature after intercooler	If -30°C (-22°F), sensor circuit is open If 149°C (300°F) or more, sensor circuit is shorted
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	-
Pre Glow	Pre glow operation	-
After Glow	After glow operation	-
Accel Position	Accelerator pedal position sensor	-
Accel Sens. No.1 Volt %	Accelerator pedal position No. 1 output voltage	-
Accel Sens. No.2 Volt %	Accelerator pedal position No. 2 output voltage	-
Target Throttle Position	Target throttle position	-
Actual Throttle Position	Actual throttle position	-
Throttle Sensor Volt %	Throttle position sensor output voltage	-
Throttle Motor DUTY	Throttle actuator	-
Injection Volume	Injection volume	-
Inj. FB Vol. for Idle	Injection feedback value for idle speed control	-
Injection Feedback Val #1	Injection volume correction for cylinder 1	-
Injection Feedback Val #2	Injection volume correction for cylinder 2	-
Injection Feedback Val #3	Injection volume correction for cylinder 3	-
Injection Feedback Val #4	Injection volume correction for cylinder 4	-
Pilot 1 Injection Period	Pilot 1 injection	-
Pilot 2 Injection Period	Pilot 2 injection	-
Main Injection Period	Main injection	-
After Injection period	Post injection	-
Pilot 1 Injection Timing	Pilot 1 injection	-
Pilot 2 Injection Timing	Pilot 2 injection	-
Main Injection Timing	Main injection	-
After Injection Timing	Post injection	-
Injector Memory Error	EEPROM malfunction for injector	-
Fuel Press	Fuel pressure	-
Fuel Temperature	Fuel temperature	-
Target Pump SCV Current	Pump current target final value	-
Pump SCV Learning Value	Pump current learning value	-
AF Lambda B1S1	Lambda equivalent ratio	-
AFS Voltage B1S1	Air fuel ratio sensor output voltage	-
AFS Current B1S1	Air fuel ratio sensor output current	-
Target EGR Position	Target EGR valve position	-
Actual EGR Valve Pos.	Actual EGR valve position	-
EGR Operation Prohibit	EGR Active Test operation prohibit	-
Target Booster Pressure	Target booster pressure	-
VN Turbo Command	VN turbo command	-
Exhaust Temperature B1S1	Exhaust temperature sensor for B1S1	If 20°C (68°F), sensor circuit is open If 900°C (1652°F) or more, sensor circuit is shorted
Exhaust Temperature B1S2	Exhaust temperature sensor for B1S2	If 20°C (68°F), sensor circuit is open If 900°C (1652°F) or more, sensor circuit is shorted
DPF Differential Pressure	DPF differential pressure sensor output	-
Catalyst Differential Press	Standardized DPF differential pressure	-
DPF No Activate	DPF operation	-
DPF PM Block	DPF PM block	-
Starter Signal	Starter signal	-
Starter Control	Starter control	-
Starter Relay	Starter relay	-
ACC Relay	ACC Relay	-
Neutral Position SW Signal	Park/neutral position SW signal	-
Clutch Switch	Clutch switch	-
Stop Light Switch	Stop light switch	-
A/C Signal	Air conditioning signal	-
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 cycle after DTC cleared	-
ACT VSV	A/C cut status for Active Test	-
Electric Fan Motor	Electric fan motor	-