Home Engine/Hybrid System Engine Control 3UR-FE ENGINE CONTROL: SFI SYSTEM
Last Modified: 11-27-2007 1.6 D
Service Category: Engine/Hybrid System Section: Engine Control
Model Year: 2008 Model: LX570 Doc ID: RM000000PDS068X
Title: 3UR-FE ENGINE CONTROL: SFI SYSTEM: FREEZE FRAME DATA (2008 LX570)

FREEZE FRAME DATA

1. 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, it can help determine if the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was Lean or Rich, and other data from the time the malfunction occurred.

HINT:

If it is impossible to duplicate the problem even though a DTC is output, confirm the freeze frame data.

The ECM records engine conditions in the form of freeze frame data every 0.5 seconds. Using the Techstream, 5 separate sets of freeze frame data can be checked.

2. LIST OF FREEZE FRAME DATA

Display Item

Measurement Item

Diagnostic Note

Injector (Port)

Injection period of No. 1 cylinder

-

IGN Advance

Ignition advance

-

Calculate Load

Calculated load

Calculated load by the ECM.

Vehicle Load

Vehicle load

-

MAF

Mass air flow volume

If the mass air flow volume is approximately 0.0 g/sec.:

  • The mass air flow meter power source circuit is open or shorted.
  • The VG circuit is open or shorted.

If the mass air flow volume is 160.0 g/sec. or more:

  • The E2G circuit is open.

Engine Speed

Engine speed

-

Vehicle Speed

Vehicle speed

Speed indicated on the speedometer.

Coolant Temp

Engine coolant temperature

If the value is -40°C (-40°F), the sensor circuit is open.

If the value is 140°C (284°F) or higher, the sensor circuit is shorted.

Intake Air

Intake air temperature

If the value is -40°C (-40°F), the sensor circuit is open.

If the value is 140°C (284°F) or higher, the sensor circuit is shorted.

2nd Air System Status

Second air system status

-

Air-Fuel Ratio

Ratio compared to stoichiometric level

-

Purge Density Learn Value

Learning value of purge density

-

Evap 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 Pos. Sensor Output

Throttle position

-

Throttle Sensor Position

Throttle sensor positioning

-

Throttle Sensor Position #2

Throttle sensor positioning #2

-

Throttle Motor DUTY

Throttle actuator

-

O2S B1 S2

O2S B2 S2

Heated oxygen sensor output

Performing the Control the Injection Volume or Control the Injection Volume for A/F Sensor function of the Active Test enables the technician to check the output voltage of the sensor.

AFS B1 S1

AFS B2 S1

A/F sensor output

Performing the Control the Injection Volume or Control the Injection Volume for A/F Sensor function of the Active Test enables the technician to check the output voltage of the sensor.

AFS B2 S1

A/F sensor current

-

Total FT #1

Total FT #2

Total fuel trim

-

Short FT #1

Short-term fuel trim

Short-term fuel compensation is used to maintain the air-fuel ratio at the stoichiometric air-fuel ratio.

Long FT #1

Long-term fuel trim

Overall fuel compensation is carried out in the long-term to compensate for a continual deviation of the short-term fuel trim from the central valve.

Short FT #2

Short-term fuel trim

Short-term fuel compensation is used to maintain the air-fuel ratio at the stoichiometric air-fuel ratio.

Long FT #2

Long-term fuel trim

Overall fuel compensation is carried out in the long-term to compensate for a continual deviation of the short-term fuel trim from the central valve.

Fuel System Status (Bank 1)

Fuel system status (for Bank 1)

  • OL (Open Loop): Has not yet satisfied the conditions to go to closed loop.
  • CL (Closed Loop): Using the heated oxygen sensor as feedback for fuel control.
  • OLDrive: Open loop due to driving conditions (fuel enrichment).
  • OLFault: Open loop due to a detected system fault.
  • CLFault: Closed loop but the heated oxygen sensor, which is used for fuel control, is malfunctioning.

Fuel System Status (Bank 2)

Fuel system status (for Bank 2)

  • OL (Open Loop): Has not yet satisfied the conditions to go to closed loop.
  • CL (Closed Loop): Using the heated oxygen sensor as feedback for fuel control.
  • OLDrive: Open loop due to driving conditions (fuel enrichment).
  • OLFault: Open loop due to a detected system fault.
  • CLFault: Closed loop but the heated oxygen sensor, which is used for fuel control, is malfunctioning.

AF Lambda B1 S1

Fuel trim at A/F sensor

-

AFS B1 S1

A/F sensor current

-

AF FT B2 S1

Fuel trim at A/F sensor

-

Catalyst Temp (B1 S1)

Catalyst Temp (B2 S1)

Estimated catalyst temperature (for Sensor 1)

-

Catalyst Temp (B1 S2)

Catalyst Temp (B2 S2)

Estimated catalyst temperature (for Sensor 2)

-

Sub O2S Impedance B1S2

Sub O2S Impedance B2S2

Sub heated oxygen sensor impedance (for Sensor 2)

-

Initial Engine Coolant Temp

Engine coolant temperature at engine start

-

Initial Intake Air Temp

Intake air temperature at engine start

-

Injection Volum (Cylinder 1)

Injection volume

-

Air pump pressure (absolute)

Air pump pressure

-

Air Pump Pulsation Pressure

Air pump pulsation pressure

-

Air Pump2 Pressure (Absolute)

Air pump pressure

-

Air Pump2 Pulsation Pressure

Air pump pulsation pressure

-

Power Steering Pressure

Power steering pressure sensor

-

SPD (SP2)

Output shaft speed

-

SPD (NT)

Input shaft speed

Data is displayed in increments of 50 rpm.

ACC Relay

ACC relay status

-

Starter Relay

Starter relay status

-

Starter Signal

Starter switch (STSW) signal

-

Starter Control

Starter switch status

-

Power Steering Switch

Power steering switch status

-

Power Steering Signal

Power steering signal (history)

This signal status is usually ON until the cables are disconnected from the battery terminals.

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

-

Immobiliser Communication

Immobiliser communication

-

Fuel Cut Condition

Fuel cut condition

-

Battery Voltage

Battery voltage

-

Atmosphere Pressure

Atmosphere pressure

-

Secondary Air Control VSV

Secondary air injection system status

-

ACIS VSV

VSV for Acoustic Control Induction System (ACIS)

-

ACT VSV

A/C cut status for Active Test

-

VVT Control Status (Bank 2)

VVT control status

-

EVAP Purge VSV

EVAP Purge VSV

-

Fuel Pump/Speed Status

Fuel pump/speed status

-

VVT Control Status (Bank 1)

VVT control status

-

Vacuum Pump

Key-off EVAP system leak detection pump status

Refer to the EVAP System

3UR-FE ENGINE CONTROL: SFI SYSTEM: RELATED DTCS (2008 LX570) .

EVAP System Vent Value

Key-off EVAP system vent valve status

-

TC and TE1

TC and CG (TE1) terminals of DLC3

-

AI Test

Secondary air injection system operation prohibit

-

Engine Speed of Cyl #1

Engine speed for cylinder 1

-

Engine Speed of Cyl #2

Engine speed for cylinder 2

-

Engine Speed of Cyl #3

Engine speed for cylinder 3

-

Engine Speed of Cyl #4

Engine speed for cylinder 4

-

Engine Speed of Cyl #5

Engine speed for cylinder 5

-

Engine Speed of Cyl #6

Engine speed for cylinder 6

-

Engine Speed of Cyl #7

Engine speed for cylinder 7

-

Engine Speed of Cyl #8

Engine speed for cylinder 8

-

Av Engine Speed of All Cyl

Engine speed for all cylinders

-

VVT Aim Angle (Bank 1)

VVT aim angle

-

VVT Change Angle (Bank 1)

VVT change angle

-

VVT OCV Duty (Bank 1)

VVT OCV operation duty

-

VVT Ex Hold Lrn Val (Bank 1)

VVT exhaust hold duty ratio learning value (Bank 1)

-

VVT Ex Chg Angle (Bank 1)

VVT exhaust change angle (Bank 1)

-

VVT Ex OCV Duty (Bank 1)

VVT exhaust OCV duty (Bank 1)

-

VVT Aim Angle (Bank 2)

VVT aim angle

-

VVT Change Angle (Bank 2)

VVT change angle

-

VVT OCV Duty (Bank 2)

VVT OCV operation duty

-

VVT Ex Hold Lrn Val (Bank 2)

VVT exhaust hold duty ratio learning value (Bank 2)

-

VVT Ex Chg Angle (Bank 2)

VVT exhaust change angle (Bank 2)

-

VVT Ex OCV Duty (Bank 2)

VVT exhaust OCV duty (Bank 2)

-

Idle Fuel Cut

Fuel cut idle

ON: when the throttle valve is fully closed and the engine speed is more than 3,500 rpm.

FC TAU

Fuel cut during very light load

Fuel cut being performed under a very light load to prevent the engine combustion from becoming incomplete.

Ignition

Ignition counter

-

Cylinder #1 Misfire Count

Cylinder #1 misfire

Only displayed during idling.

Cylinder #2 Misfire Count

Cylinder #2 misfire

Only displayed during idling.

Cylinder #3 Misfire Count

Cylinder #3 misfire

Only displayed during idling.

Cylinder #4 Misfire Count

Cylinder #4 misfire

Only displayed during idling.

Cylinder #5 Misfire Count

Cylinder #5 misfire

Only displayed during idling.

Cylinder #6 Misfire Count

Cylinder #6 misfire

Only displayed during idling.

Cylinder #7 Misfire Count

Cylinder #7 misfire

Only displayed during idling.

Cylinder #8 Misfire Count

Cylinder #8 misfire

Only displayed during idling.

All Cylinders Misfire Count

All cylinders misfire

Only displayed during idling.

Multi Cylinders Misfire Count

Multiple cylinder misfire

-

Misfire RPM

Engine speed when misfire occurred

-

Misfire Load

Engine load when misfire occurred

-

Misfire Margin

Margin to detect engine misfire

-

Catalyst OT MF F/C

Catalyst over temperature misfire prevention F/C

-

Cat OT MF F/C History

Catalyst over temperature misfire prevention F/C history

-

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)

-

Cat OT MF F/C Cylinder#5

Display of fuel cut operation in No. 5 cylinder (if certain level of misfire malfunction is detected)

-

Cat OT MF F/C Cylinder#6

Display of fuel cut operation in No. 6 cylinder (if certain level of misfire malfunction is detected)

-

Cat OT MF F/C Cylinder#7

Display of fuel cut operation in No. 7 cylinder (if certain level of misfire malfunction is detected)

-

Cat OT MF F/C Cylinder#8

Display of fuel cut operation in No. 8 cylinder (if certain level of misfire malfunction is detected)

-

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

-