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Freeze Frame Data

  1. FREEZE FRAME DATA 
    1. Whenever a DTC is detected, the skid control ECU stores the current vehicle (sensor) state as Freeze Frame Data.
    2. 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.

      HINT: 

      • However, if the vehicle is stopped or at a low speed (7 km/h (4.3 mph) or less), or if a DTC is detected, the skid control ECU will stop counting the number.
      • Freeze Frame Data at the time the ABS operates:

        The skid control ECU stores and updates data whenever the ABS system operates.

        When the ECU stores data at the time a DTC is detected, the data stored during ABS operation is cleared.

      • Freeze Frame Data at the time a DTC is detected:

        When the skid control ECU stores data at the time a DTC is detected, no updates will be performed until the data is cleared.

  2. CHECK FREEZE FRAME DATA 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Check the freeze frame data by following the prompts on the Techstream display.
      ABS/VSC/TRAC

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Elapsed Time after Freeze Trigger Elapsed time after freeze trigger/Min.: 0 ms, Max.: 500 ms - -
      Number of IG ON Number of operations of ignition switch being turned to ON after storing Freeze Frame Data/0 to 31 - -
      Buzzer Skid control buzzer/ON or OFF ON: Buzzer ON
      OFF: Buzzer OFF      		 -
      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      		 -
      Gear Position Gear position information/P, N, R, 1st-8th, FAIL, NOT R - Actual gear position
      Shift Lever Position Shift lever position information/P, N, R, D/M, 1st-6th/B, FAIL - Actual shift lever position
      Operated System Operated system status/ABS, VSC, TRAC, BA, FAIL, SYS, NON - ABS activated: ABS
      VSC activated: VSC
      TRAC activated: TRAC
      BA activated: BA
      Fail safe mode activated: FAIL
      System prohibit activated: SYS
      No operation activated: NON
      Master Cylinder Sensor Master cylinder pressure sensor reading/Min.: 0 V, Max.: 5 V When brake pedal is released: 0.3 to 0.9 V Reading increases when brake pedal is depressed
      M/C Sensor Grade Master cylinder pressure sensor change/Min.: -30 MPa/s, Max.: 225 MPa/s When brake pedal is released or pedal held at constant position: 0 MPa/s When brake pedal is being operated: Changes in proportion with pedal movement speed
      Yaw Rate Sensor Yaw rate sensor/Min.: -100 deg/s, Max.: 100 deg/s Vehicle stopped: 0°/s
      Turning right: -100 to 0°/s
      Turning left: 0 to 100°/s      		 -
      Lateral G Lateral G/Min.: -25.11 m/s2 , Max.: 24.91 m/s2 - During turning: Changes in proportion with acceleration
      Forward and Rearward G Forward and backward G/Min.: -25.11 m/s2 , Max.: 24.91 m/s2 - During acceleration/deceleration:
      Changes in proportion with acceleration
      FR Wheel Speed FR wheel speed sensor reading/Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Vehicle stopped:
      0 km/h      		 When driving at constant speed:
      No large fluctuations
      FL Wheel Speed FL wheel speed sensor reading/Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Vehicle stopped:
      0 km/h      		 When driving at constant speed:
      No large fluctuations
      RR Wheel Speed RR wheel speed sensor reading/Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Vehicle stopped:
      0 km/h      		 When driving at constant speed:
      No large fluctuations
      RL Wheel Speed RL wheel speed sensor reading/Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Vehicle stopped:
      0 km/h      		 When driving at constant speed:
      No large fluctuations
      Vehicle Speed Maximum wheel speed sensor reading/Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Actual vehicle speed Speed indicated on speedometer
      Vehicle Speed Grade Vehicle speed grade/Min.: -25.11 m/s2 , Max.: 24.91 m/s2 Vehicle stopped: 0 m/s2 During driving: Changes in proportion with vehicle acceleration/deceleration
      Real Engine Torque Real engine torque/Min.: -1024 N*m, Max.: 1023 N*m - -
      Accelerator Opening Angle % The difference of a present accelerator/Min.: 0%, Max.: 128% When the accelerator pedal is released: 0% During accelerator pedal operation: Changes in proportion with the pedal movement
      Inspection Mode Inspection mode/OTHER or INSPECT OTHER: Normal mode
      INSPECT: Inspection mode      		 -
      Steering Angle Sensor Steering angle sensor/Min.: -3276.8 deg, Max.: 3276.7 deg Left turn: Increase
      Right turn: Decrease      		 -
      TRAC/VSC Off Mode TRAC/VSC off mode/Normal, TRAC OFF or VSC OFF Normal: Normal mode
      TRAC OFF: TRAC OFF mode
      VSC OFF: TRAC, VSC OFF mode      		 -
  3. CLEAR FREEZE FRAME DATA 
    NOTE:

    Clearing the DTC will also clear the Freeze Frame Data.

    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Clear the DTC and Freeze Frame Data. Refer to DTC CHECK / CLEAR .
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