Last Modified: 7-3-2017 6.8:8.0.40 Doc ID: RM000001A5S007X
Model Year Start: 2007 Model: LX470 Prod Date Range: [08/2006 -           ]
Title: BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: FREEZE FRAME DATA; 2007 MY LX470 [08/2006 -        ]

FREEZE FRAME DATA

1. FREEZE FRAME DATA

HINT:

  • When a DTC is detected or the ABS operates, the skid control ECU stores the current vehicle (sensor) state as freeze frame data.
  • The skid control ECU stores the number of times (maximum: 31) the ignition switch has been turned from OFF to ON since the last time the ABS was activated. However, if the vehicle is stopped, the vehicle is driven at 7 km/h (4.3 mph) or less, or a DTC is detected, the ECU will not count the next time the ignition switch is turned from OFF to ON.
  • Freeze frame data at the time the ABS operates:

    The skid control ECU stores data or updates stored data when the ABS operates. This data is erased when the ECU stores data at the time a DTC is detected.

  • Freeze frame data at the time a DTC is detected:

    When the ECU stores data at the time a DTC is detected, the data will not be updated until the data is cleared.

(a) Connect the intelligent tester (with CAN VIM) to the DLC3.

(b) Turn the ignition switch ON.

(c) From the display on the tester, select FREEZE FRAME DATA.

Intelligent Tester Display

Measurement Item

Reference Value

VEHICLE SPD

Wheel speed sensor reading

Speed indicated on speedometer

STOP LIGHT SW

Stop light switch signal

Stop light switch ON: ON

Stop light switch OFF: OFF

# IG ON

Number of operations of ignition switch ON after memorizing freeze frame data

0 to 31

MAS CYL PRESS

Master cylinder pressure sensor output voltage

Release brake pedal: 0.3 to 0.9 V

Depress brake pedal: 3.2 to 4.5 V

MASS PRESS GRAD

Master cylinder pressure sensor changing declivity

-30 to 200 MPa/s

SYSTEM

Operate system
  • ABS activated: ABS
  • BA activated: BA
  • VSC / TRAC activated: VSS / TRC
  • No system activated: No SYS
  • Fail- safe mode activated: FAIL SF

YAW RATE

Yaw rate angle sensor output value

-100 to 100

STEERING ANG

Steering sensor output value

Left turn: Increase

Right turn: Drop

THROTTLE

Throttle position sensor output value

Release accelerator pedal: Approx. 0 deg.

Depress accelerator pedal: Approx. 90 deg.

G (RIGHT & LEFT)

Right and left G

-1,869 to 1,869

G (BACK & FORTH)

Back and forth G

-1,869 to 1,869

VAC (TRC) OFF SW

VSC OFF switch signal

VSC OFF SW ON: ON

OFF: OFF

SHIFT POSITION

Shift lever position
  • P: P
  • R: R
  • N: N
  • D: D
  • 4: 4
  • 3: 3
  • 2: 2
  • L: L

THROTTLE

Throttle sensor reading

0 to 125 deg.