Anti-Lock Brake System Freeze Frame Data

  1. FREEZE FRAME DATA

  1. CHECK FREEZE FRAME DATA

  1. CLEAR FREEZE FRAME DATA

Anti-Lock Brake System -- Freeze Frame Data



FREEZE FRAME DATA

  1. Whenever a DTC is stored, the skid control ECU (brake actuator assembly) stores the current vehicle (sensor) state as freeze frame data.

  2. The skid control ECU (brake actuator assembly) 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.

    HINT:
    1. If the vehicle is stopped or at a low speed (7 km/h (4 mph) or less), or if a DTC is stored, the skid control ECU (brake actuator assembly) stops counting the number of times the ignition switch has been turned from off to ON.
    2. Freeze frame data at the time the ABS operates:
      The skid control ECU (brake actuator assembly) stores and updates data whenever the ABS operates.
      When the ECU stores data at the time a DTC is stored, the data stored during ABS operation is cleared.
    3. Freeze frame data at the time a DTC is stored:
      When the skid control ECU (brake actuator assembly) stores data at the time a DTC is stored, no updates are performed until the data is cleared.

CHECK FREEZE FRAME DATA

  1. Connect the GTS to the DLC3.

  2. Turn the ignition switch to ON.

  3. Turn the GTS on.

  4. Enter the following menus: Chassis / ABS/VSC/TRC / Trouble Codes.

  5. According to the display on the GTS, select the trouble code data display with freeze frame data.

    ABS/VSC/TRC
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Elapsed Time after Freeze Trigger
    		Elapsed time after freeze trigger/ Min.: 0 msec, Max.: 500 msec
    		-
    		-
    Number of IG ON
    		Number of times ignition switch turned to ON after storing freeze frame data/ 0 to 31
    		-
    		-
    Stop Light SW
    		Stop light switch/ ON or OFF
    		ON: Brake pedal depressed
    OFF: Brake pedal released
    		-
    Parking Brake SW
    		Parking brake switch/ ON or OFF
    		ON: Parking brake applied
    OFF: Parking brake released
    		-
    Operated System
    		Operated system status/ ABS, VSC, TRC, BA, HAB, PBA, PB, HA-CTRL, Fail, TSC, Sys or Non
    		-
    		ABS: ABS is activated.
    VSC: VSC is activated.
    TRC: TRC is activated.
    BA: BA is activated.
    Fail: Fail-safe mode is activated.
    Sys: System prohibit is activated.
    Non: No operation is activated.
    Master Cylinder Sensor
    		Master cylinder pressure sensor reading/ Min.: 0.00 V, Max.: 5.00 V
    		When brake pedal released: 0.3 to 0.9 V
    		The value increases when the brake pedal is depressed.
    M/C Sensor Grade
    		Master cylinder pressure sensor change/ Min.: -30 MPa/s, Max.: 225 MPa/s
    		When brake pedal released or pedal held at constant position: 0 MPa/s
    		Changes in proportion to the pedal movement speed when the brake pedal is being operated.
    Forward and Rearward G
    		Forward and backward G/ Min.: -25.10 m/s2, Max.: 24.90 m/s2
    		-
    		Changes in proportion to acceleration during acceleration/deceleration.
    FR Wheel Speed
    		Front speed sensor RH value/ Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)
    		Vehicle stopped: 0 km/h
    		No large fluctuations when driving at a constant speed.
    FL Wheel Speed
    		Front speed sensor LH value/ Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)
    		Vehicle stopped: 0 km/h
    		No large fluctuations when driving at a constant speed.
    RR Wheel Speed
    		Rear speed sensor RH value/ Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)
    		Vehicle stopped: 0 km/h
    		No large fluctuations when driving at a constant speed.
    RL Wheel Speed
    		Rear speed sensor LH value/ Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)
    		Vehicle stopped: 0 km/h
    		No large fluctuations when driving at a constant speed.
    Vehicle Speed
    		Maximum wheel speed sensor value/ Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)
    		Actual vehicle speed
    		The speed which is indicated on the speedometer.
    Vehicle Speed Grade
    		Vehicle acceleration/ Min.: -25.10 m/s2, Max.: 24.90 m/s2
    		Vehicle stopped: 0 m/s2
    		Changes in proportion to the vehicle acceleration/deceleration during driving.
    FR Wheel Direction
    		Front wheel RH direction signal/ Forward or Back
    		Forward: Forward
    Back: Backward
    		-
    FL Wheel Direction
    		Front wheel LH direction signal/ Forward or Back
    		Forward: Forward
    Back: Backward
    		-
    RR Wheel Direction
    		Rear wheel RH direction signal/ Forward or Back
    		Forward: Forward
    Back: Backward
    		-
    RL Wheel Direction
    		Rear wheel LH direction signal/ Forward or Back
    		Forward: Forward
    Back: Backward
    		-
    Accelerator Opening Angle %*
    		Throttle valve opening amount/ Min.: 0.0%, Max.: 128.0%
    		When accelerator pedal released: 0%
    		Changes in proportion to the movement of the pedal during accelerator pedal operation.
    Brake Pedal Load Sensing SW
    		Brake pedal load sensing switch/ ON or OFF
    		ON: Brake pedal depressed beyond specified point
    OFF: Brake pedal not depressed beyond specified point
    		-

    1. *: for 2TR-FE

CLEAR FREEZE FRAME DATA
NOTICE:
Clearing the DTC also clears the freeze frame data.

  1. Connect the GTS to the DLC3.

  2. Turn the ignition switch to ON.

  3. Clear the DTCs and freeze frame data (LandCruiser RM000000XHV0KDX.html).