Brand:
Toyota
Model Name:
Yaris NCP90 91 92 93
Manual:
Repair Manual
Section:
1Nz-Fe Engine Control System
Title:
Sfi System
DESCRIPTION
- Freeze frame data records the engine conditions (fuel system, calculated load, engine coolant temperature, fuel trim, engine speed, vehicle speed, etc.) when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was Lean or Rich, and other data from the time the malfunction occurred.
- 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 an 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 sets before the DTC was set.
- 1 data set when the DTC was set.
- 1 data set after the DTC was set.
- 3 data sets before 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 the cause of the malfunction, and in judging whether it was temporary or not.
- 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
| LABEL (Intelligent Tester Display) | Measure Item/Range | Diagnostic Note |
| Injector | Injection period of No.1 cylinder | - |
| IGN Advance | Ignition advance | - |
| Calculate Load | Calculated load | Calculated load by ECM |
| Vehicle Load | Vehicle load | - |
| MAF | Mass air flow volume | If approximately 0.0 g/sec:
|
| Engine Speed | Engine speed | - |
| Vehicle Speed | Vehicle speed | Speed indicated on speedometer |
| Coolant Temp | Engine coolant temperature | If -40°C (-40°F), sensor circuit open If 140°C (284°F) or more, sensor circuit shorted |
| Intake Air | Intake air temperature | If -40°C (-40°F), sensor circuit open If 140°C (284°F) or more, sensor circuit shorted |
| Air-Fuel Ratio | Ratio compared to stoichiometric level | - |
| Purge Density Learn Value | Learning value of purge density | - |
| Purge Flow | Ratio of evaporative purge flow to intake air volume | - |
| EVAP (Purge) VSV | EVAP purge VSV duty ratio | - |
| Knock Correct Learn Value | Correction learning value of knocking | - |
| Knock Feedback Value | Feedback value of knocking | - |
| Accelerator Position No. 1 | Absolute Accelerator Pedal Position (APP) No. 1 | - |
| Accelerator Position No. 2 | Absolute APP No. 2 | - |
| Throttle Position | Throttle sensor positioning | - |
| Throttle Sensor Position | Throttle position | - |
| Throttle Sensor Position #2 | Throttle sensor positioning #2 | - |
| Throttle Motor | Throttle motor | - |
| O2S B1 S1 | Heated oxygen sensor 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 |
| O2S B1 S2 | Heated oxygen sensor 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 |
| Total FT #1 | 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 long-term to compensate a continual deviation of short-term fuel trim from central value |
| Fuel System Status (Bank 1) | Fuel system status (Bank 1) |
|
| O2FT B1 S1 | Fuel trim at heated oxygen sensor | - |
| O2 LR B1 S1 | Heated oxygen sensor response time (Lean to Rich) | - |
| O2 RL B1 S1 | Heated oxygen sensor response time (Rich to Lean) | - |
| Catalyst Temp (B1 S1) | Estimated catalyst temperature (sensor 1) | - |
| Catalyst Temp (B1 S2) | Estimated catalyst temperature (sensor 2) | - |
| Sub O2S Impedance B1S2 | Sub heated oxygen sensor impedance (sensor 2) | - |
| Initial Engine Coolant Temp | Engine coolant temperature at engine start | - |
| Initial Intake Air Temp | Intake air temperature at engine start | - |
| Injection Volume (Cylinder 1) | Injection volume | - |
| ACC Relay | ACC (Accessory) relay | - |
| Starter Relay | Starter relay (STA) signal | - |
| Starter Signal | Starter switch (STSW) signal | - |
| Starter Control | Starter control (STAR) signal | - |
| Power Steering Switch | Power Steering Signal | - |
| Power Steering Signal | Power Steering Signal (history) | Signal status usually ON until battery terminals disconnected |
| Closed Throttle Position SW | Closed throttle position switch | - |
| A/C Signal | A/C signal | - |
| Neutral Position SW Signal | Park/Neutral Position (PNP) switch signal | - |
| Electrical Load Signal | Electrical load signal | - |
| Stop Light Switch | Stop light switch | - |
| Battery Voltage | Battery voltage | - |
| EVAP Purge VSV | EVAP Purge VSV status | - |
| Fuel Pump/Speed Status | Fuel pump/speed status | - |
| VVT Control Status (Bank 1) | VVT control status | - |
| Electric Fan Motor | Electric fan motor | - |
| TC and TE1 | TC and CG (TE1) terminals of DLC3 | - |
| VVT Aim Angle (Bank 1) | VVT aim angle | - |
| VVT Change Angle (Bank 1) | VVT angle | - |
| VVT OCV Duty (Bank 1) | VVT OCV operation duty) | - |
| Idle Fuel Cut | Fuel cut idle | ON: when throttle valve fully closed and engine speed over 1,500 rpm |
| FC TAU | Fuel cut during very light load | Fuel cut being performed under very light load to prevent engine combustion from becoming incomplete |
| Ignition | Ignition counter | - |
| Cylinder #1 Misfire Rate | Cylinder #1 misfire rate | Only displayed during idling |
| Cylinder #2 Misfire Rate | Cylinder #2 misfire rate | Only displayed during idling |
| Cylinder #3 Misfire Rate | Cylinder #3 misfire rate | Only displayed during idling |
| Cylinder #4 Misfire Rate | Cylinder #4 misfire rate | Only displayed during idling |
| All Cylinders Misfire Rate | All cylinder misfire rate | Only displayed during idling |
| Misfire RPM | Engine speed when misfire occur | - |
| Misfire Load | Engine load when misfire occur | - |
| Misfire Margin | Margin to detect engine misfire | - |
| Engine Run Time | Accumulated engine running time | - |
| Time after DTC Cleared | Cumulative time after DTC cleared | - |
| Distance from DTC Cleared | Accumulated distance from DTC cleared | - |
| Warmup Cycle Cleared DTC | Warm-up cycle after DTC cleared | - |