ANTI-LOCK BRAKE SYSTEM FREEZE FRAME DATA


  1. FREEZE FRAME DATA


    1. Whenever a DTC is stored, 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 brake control system was activated.

      Tech Tips


      • If the vehicle is stopped or at a low speed (7 km/h (4.3 mph) or less), or if a DTC is stored, the skid control ECU will stop counting the number of times the ignition switch has been turned from off to ON.

      • Freeze Frame Data at the time the brake control system operates:

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

        When the ECU stores data at the time a DTC is stored, the data stored during brake control system operation is cleared.

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

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

  2. CHECK FREEZE FRAME DATA


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the intelligent tester on.

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

    5. According to the display on the tester, select the Freeze Frame Data.

      ABS/VSC/TRC
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Elapsed Time after Freeze Trigger

      Elapsed time after freeze frame trigger/

      Min.: 0 msec, Max.: 500 msec

      		 - -
      Number of IG ON

      Number of operations of ignition switch being 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/

      Non, ABS, VSC, TRC, BA, HAB, Fail, PBA, PB, HA-CTRL or Sys

      		 -

      No system activated: Non

      ABS activated: ABS

      Fail-safe mode activated: Fail

      System prohibit activated: Sys
      FR Wheel Speed

      Front speed sensor RH reading/

      Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)

      		 Actual wheel speed

      When driving at constant speed:

      No large fluctuations
      FL Wheel Speed

      Front speed sensor LH reading/

      Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)

      		 Actual wheel speed

      When driving at constant speed:

      No large fluctuations
      RR Wheel Speed

      Rear speed sensor RH reading/

      Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)

      		 Actual wheel speed

      When driving at constant speed:

      No large fluctuations
      RL Wheel Speed

      Rear speed sensor LH reading/

      Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph)

      		 Actual wheel speed

      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 acceleration/

      Min.: -25.10 m/s2, Max.: 24.90 m/s2

      		During driving: Changes in proportion to vehicle acceleration/deceleration -

  3. CLEAR FREEZE FRAME DATA

    Note

    Clearing the DTCs will also clear the Freeze Frame Data.


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Clear the DTCs and Freeze Frame Data Click here.