ANTI-LOCK BRAKE SYSTEM FREEZE FRAME DATA


  1. FREEZE FRAME DATA


    1. Whenever a DTC is detected, 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.

      Tech Tips


      • 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 (brake actuator assembly) will stop counting the number.

      • Freeze Frame Data at the time the ABS operates:

        The skid control ECU (brake actuator assembly) 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 (brake actuator assembly) 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. Replace the normal DLC3 cable (12 V specification) for the intelligent tester with the 24 V DLC3 cable.

      Note

      Be sure to use the 24 V DLC3 cable when connecting the intelligent tester to the DLC3. Using the normal DLC3 cable (12 V specification) will cause damage to the tester.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the intelligent tester on.

    5. Check the freeze frame data by following the prompts on the intelligent tester display.

      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 operations of ignition switch being turned to ON after storing Freeze Frame Data / 0 to 31 - -
      Stop Light SW Stop light switch / OFF or ON

      OFF: Brake pedal released

      ON: Brake pedal depressed

      		 -
      Parking Brake SW Parking brake switch / OFF or ON

      OFF: Parking brake released

      ON: Parking brake applied

      		 -
      Operated System Operated system status / Non, ABS, VSC, TRC, BA, HAB, Fail, PBA, PB, HA-CTRL, TSC, Sys -

      Non: No system activated

      ABS: ABS activated

      VSC: VSC activated

      TRC: TRC activated

      BA: BA activated

      HAB: HAB activated

      Fail: Fail safe mode activated

      PBA: PBA activated

      PB: PB activated

      HA-CTRL: Hill-start assist control activated

      TSC: TSC activated

      Sys: System prohibited
      Master Cylinder Sensor Master cylinder pressure sensor reading / Min.: 0.00 V, Max.: 5.00 V When brake pedal is released: 0.30 to 0.70 V Reading increases when brake pedal is depressed.
      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
      IG1 Voltage Value IG voltage value / Min.: 0.00 V, Max.: 40.00 V - Changes in proportion to battery voltage

  3. CLEAR FREEZE FRAME DATA

    Note

    Clearing the DTC will also clear the Freeze Frame Data.


    1. Replace the normal DLC3 cable (12 V specification) for the intelligent tester with the 24 V DLC3 cable.

      Note

      Be sure to use the 24 V DLC3 cable when connecting the intelligent tester to the DLC3. Using the normal DLC3 cable (12 V specification) will cause damage to the tester.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch to ON.

    4. Clear the DTC and Freeze Frame Data Click here.