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 replicate the problem even though a DTC is detected, confirm the freeze frame data. The ECM records engine conditions in the from of freeze frame data every 0.5 seconds. Using the intelligent tester, five separate sets of freeze frame data, including the data values at the time when the DTC was set, can be checked.
- 3 data set 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.
- LIST OF FREEZE FRAME DATA
FREEZE FRAME DATA LIST
| LABEL (Intelligent Tester Display) | Measure Item/Range | Diagnostic Note |
|---|---|---|
| IGN ADVANCE | Ignition advance | - |
| CALC LOAD | Calculate load Calculated load by | ECM |
| VEHICLE LOAD | Vehicle load | - |
| MAF | Mass air flow volume | If value approximately 0.0 g/s:
If value 160.0 g/s or more:
|
| ENGINE SPD | Engine speed | - |
| VEHICLE SPD | Vehicle speed | Speed indicated on speedometer |
| COOLANT TEMP | Engine coolant temperature If | value -40°C (-40°F), sensor circuit open If value 140°C (258°F), sensor circuit shorted |
| INTAKE AIR | Intake air temperature | If value -40°C (-40°F), sensor circuit open If value 140°C (258°F), sensor circuit shorted |
| FUEL PRESS | Fuel Pressure | - |
| AIR-FUEL PATIO | Air-fuel ratio | - |
| AMBIENT TEMP | Ambient temperature | - |
| PURGE DENSITY | Learning value of purge density | - |
| PURGE FLOW | Purge flow | - |
| EVAP PURGE VSV | EVAP purge VSV duty ratio | - |
| KNOCK CRRT VAL | Correction learning value of knocking | - |
| KNOCK FB VAL | Feedback value of knocking | - |
| ACCEL POS #1 | Absolute Accelerator Pedal Position (APP) No. 1 | - |
| ACCEL POS #2 | Absolute APP No. 2 | - |
| THROTTLE POS | Throttle position | Read value with engine switch on (IG) (Do not start engine) |
| THROTTLE POS | Throttle sensor positioning | Read value with engine switch on (IG) (Do not start engine) |
| THROTTLE POS #2 | Throttle sensor positioning #2 | - |
| THROTTLE MOT | Throttle motor | - |
| O2S B1 S2 | Heated oxygen sensor output | Performing INJ VOL or A/F CONTROL function of ACTIVE TEST enables technician to check output voltage of sensor |
| O2S B2 S2 | Heated oxygen sensor output | Performing INJ VOL or A/F CONTROL function of ACTIVE TEST enables technician to check output voltage of sensor |
| AFS B1 S1 | A/F sensor output | Performing INJ VOL or A/F CONTROL function of ACTIVE TEST enables technician to check output voltage of sensor |
| AFS B2 S1 | A/F sensor output | Performing INJ VOL or A/F CONTROL function of ACTIVE TEST enables technician to check output voltage of sensor |
| TOTAL FT #1 | Total fuel trim | - |
| TOTAL FT #2 | Total fuel trim | - |
| 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 longterm to compensate a continual deviation of short-term fuel trim from central valve |
| 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 longterm to compensate a continual deviation of short-term fuel trim from central valve |
| FUEL SYS #1 | Fuel system status (Bank 1) |
|
| FUEL SYS #2 | Fuel system status (Bank 2) |
|
| O2FT B1 S2 | Fuel trim at heated oxygen sensor | Same as SHORT FT #1 |
| O2FT B2 S2 | Fuel trim at heated oxygen sensor | Same as SHORT FT #1 |
| AF FT B1 S1 | Fuel trim at A/F sensor | - |
| AF FT B2 S1 | Fuel trim at A/F sensor | - |
| CAT TEMP B1 S1 | Catalyst temperature | - |
| CAT TEMP B2 S1 | Catalyst temperature | - |
| CAT TEMP B1 S2 | Catalyst temperature | - |
| CAT TEMP B2 S2 | Catalyst temperature | - |
| INI COOL TEMP | Initial engine coolant temperature | - |
| INI INTAKE TEMP | Initial intake air temperature | - |
| INJ VOL | Injection volume | - |
| ING TIMMING D4 | Injection timing (D4) | - |
| FUEL PUMP D4 | Fuel pump duty (D4) | - |
| COMBUSTION D4 | Combustion status (D4) | - |
| ACC RELAY | ACC relay | - |
| STARTER RELAY | Starter relay | - |
| STARTER SIG | Starter signal | - |
| STARTER CONTROL | Starter control | - |
| CTP SW | Closed throttle position switch | - |
| A/C SIGNAL | A/C signal | - |
| PNP SW (NSW) | Neutral position switch signal | - |
| ELECT LOAD SIG | Electrical load signal | - |
| STOP LIGHT SW | Stop light switch | - |
| ENG OIL PRES SW | Engine oil pressure switch signal | Always ON while engine is running |
| BATTERY VOLTAGE | Battery voltage | - |
| ATM PRESSURE | Atmospheric pressure | - |
| FUEL PMP SP CTL | Fuel pump speed control status | - |
| VVT CTRL B2 | VVT control status (bank 2) | - |
| EVAP (Purge) VSV | EVAP Purge VSV | - |
| A/C MAG CLUTCH | A/C magnetic clutch relay | - |
| FUEL PUMP/SPD | Fuel pump/speed status | - |
| VVT CTRL B1 | VVT control status (bank 1) | - |
| TC/TE1 | TC and TE1 terminals of DLC3 | - |
| SCV DUTY RATIO | SCV duty ratio | - |
| VVTL AIM ANGL#1 | VVT aim angle (bank 1) | - |
| VVT CHNG ANGL#1 | VVT change angle (bank 1) | - |
| VVT OCV D B1 | VVT OCV operation duty (bank 1) | - |
| VVT EX HOLD B1 | VVT exhaust hold duty ratio learning value (bank 1) | - |
| VVT EX CHG ANG1 | VV exhaust change angle (bank 1) | - |
| VVT EX OCV D B1 | VVT exhaust OCV duty (bank 1) | - |
| VVTL AIM ANGL#2 | VVT aim angle (bank 2) | - |
| VVT CHNG ANGL#2 | VVT change angle (bank 2) | - |
| VVT OCV DUTY B2 | VVT OCV operation duty (bank 2) | - |
| VVT EX HOLD B2 | VVT exhaust hold duty ration learning value (bank 2) | - |
| VVT EX CHG ANG2 | VVT exhaust change angle (bank 2) | - |
| VVT EX OCV D B2 | VVT exhaust OCV duty (bank 2) | - |
| FC IDL | Idle fuel cut | ON: when throttle valve fully closed and engine speed over 1,500 rpm |
| FC TAU | FC TAU | Fuel cut being performed under very light load to prevent engine combustion from becoming incomplete |
| IGNITION | Ignition | - |
| CYL ALL | All cylinder misfire rate | Displayed only while idling |
| MISFIRE RPM | Misfire RPM | - |
| CYL ALL | All cylinder misfire rate | Displayed only while idling |
| MISFIRE RPM | Misfire RPM | - |
| MISFIRE LOAD | Misfired load | - |
| MISFIRE MARGIN | Misfire monitoring | - |
| ENG RUN TIME | Accumulated engine running time | - |
| TIME DTC CLEAR | Cumulative time after DTC cleared | - |
| DIST DTC CLEAR | Accumulated distance after DTC cleared | - |
| WU CYC DTC CLEAR | Warm-up cycle after DTC cleared | - |