Vehicle Stability Control System (For Hydraulic Brake Booster) Freeze Frame Data

  1. FREEZE FRAME DATA

  1. CHECK FREEZE FRAME DATA

  1. CLEAR FREEZE FRAME DATA

Vehicle Stability Control System (For Hydraulic Brake Booster) -- Freeze Frame Data



FREEZE FRAME DATA

  1. Whenever a DTC is stored, the skid control ECU (master cylinder solenoid) stores the current vehicle (sensor) state as freeze frame data.

  2. The skid control ECU (master cylinder solenoid) stores the number of times (maximum: 31) the ignition switch has been turned from off to ON since the last time the ABS/VSC 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 (master cylinder solenoid) will stop counting the number of times the ignition switch has been turned from off to ON.
    2. Freeze frame data at the time the ABS/VSC operates:
      The skid control ECU (master cylinder solenoid) stores and updates data whenever the ABS/VSC operates.
      When the ECU stores data at the time a DTC is stored, the data stored during ABS/VSC operation is cleared.
    3. Freeze frame data at the time a DTC is stored:
      When the skid control ECU (master cylinder solenoid) stores data at the time a DTC is stored, no updates will be 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 / DTC.

  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
    		-
    		-
    Buzzer
    		Buzzer/ ON or OFF
    		ON: Buzzer on
    OFF: Buzzer off
    		The combination meter has a built-in buzzer.
    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
    		-
    Reservoir Warning SW
    		Brake fluid level warning switch/ ON or OFF
    		OFF
    		-
    Gear Position
    		Gear position information/ "P,N", R, 1st-8th, Fail or Not R
    		Actual gear position
    		-
    Shift Lever Position
    		Shift lever position information/ "P,N", R, D/M, 1st-6th/B or Fail
    		Actual shift lever position
    		-
    Operated System
    		Operated system status/ ABS, VSC, TRC, BA, HAB, PBA, PB, HA-CTRL, TSC, Fail, Sys or Non
    		-
    		ABS: ABS is activated.
    VSC: VSC is activated.
    TRC: TRC is activated.
    BA: BA is activated.
    HAB: High power assist brake*1 is activated.
    PBA: Pre-collision brake assist is activated.
    PB: Pre-collision brake is activated.
    HA-CTRL: Hill-start assist control is activated.
    1. TSC: Trailer sway control 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 with the pedal movement speed when the brake pedal is being operated.
    Yaw Rate Sensor
    		Yaw rate and acceleration sensor/ Min.: -128°/s, Max.: 127°/s
    		Vehicle stopped: 0°/s
    Turning right: -128 to 0°/s
    Turning left: 0 to 127°/s
    		-
    Lateral G
    		Lateral G/ Min.: -25.10 m/s2, Max.: 24.90 m/s2
    		-
    		Changes in proportion with 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 with acceleration during acceleration/deceleration.
    FR Wheel Speed
    		Front wheel speed sensor RH reading/ Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)
    		Vehicle stopped: 0 km/h (0 mph)
    		No large fluctuations when driving at a constant speed.
    FL Wheel Speed
    		Front wheel speed sensor LH reading/ Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)
    		Vehicle stopped: 0 km/h (0 mph)
    		No large fluctuations when driving at a constant speed.
    RR Wheel Speed
    		Rear wheel speed sensor RH reading/ Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)
    		Vehicle stopped: 0 km/h (0 mph)
    		No large fluctuations when driving at a constant speed.
    RL Wheel Speed
    		Rear wheel speed sensor LH reading/ Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)
    		Vehicle stopped: 0 km/h (0 mph)
    		No large fluctuations when driving at a constant speed.
    Vehicle Speed
    		Maximum wheel speed sensor reading/ Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)
    		Vehicle stopped: 0 km/h (0 mph)
    		When driving at constant speed: No large fluctuations
    Vehicle Speed Grade
    		Vehicle acceleration/ Min.: -25.10 m/s2, Max.: 24.90 m/s2
    		Vehicle stopped: 0 m/s2
    		Changes in proportion with 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
    		-
    Real Engine Torque
    		Actual engine torque/ Min.: -1024.0 Nm, Max.: 1023.0 Nm
    		-
    		-
    Accelerator Opening Angle %
    		Throttle valve opening amount/ Min.: 0.0%, Max.: 128.0%
    		When accelerator pedal released: 0%
    		Changes in proportion with the movement of the pedal during accelerator pedal operation.
    Inspection Mode
    		Inspection mode/ Other or Inspect
    		Other: Normal mode
    Inspect: Inspection mode
    		-
    Steering Angle Sensor
    		Steering angle sensor/ Min.: - 3276.8°, Max.: 3276.7°
    		Left turn: Increase
    Right turn: Decrease
    		-
    Pre Crash Brake OFF Switch*2
    		Pre-crash brake cancel switch/ ON or OFF
    		ON: Pre-crash brake cancel switch on
    OFF: Pre-crash brake cancel switch off
    		-
    TRC/VSC Off Mode
    		TRC/VSC off mode/ Normal, TRC OFF or VSC OFF
    		Normal: Normal mode
    TRC OFF: TRC off mode
    VSC OFF: VSC off mode
    		-

    1. *1: This function provides an assist in addition to that of the brake assist function when the driver requests a large amount of braking force.
    2. *2: w/ Dynamic Radar Cruise Control System

CLEAR FREEZE FRAME DATA
NOTICE:
Clearing the DTCs will also clear 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 RM0000046KV016X.html).