VEHICLE STABILITY CONTROL SYSTEM FREEZE FRAME DATA


  1. FREEZE FRAME DATA


    1. Whenever an ABS 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 (IG) since the last time the ABS 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 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 erased.

      • 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 intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    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 DTC data display with Freeze Frame Data.

      ABS / VSC / TRC:
      Tester Display Measurement Item Reference Value
      Elapsed Time after Freeze Trigger Elapsed time after freeze frame trigger Min.: 0 ms, Max.: 500 ms
      Number of IG ON Number of operations of ignition switch being turned on (IG) after storing Freeze Frame Data 0 to 31
      Buzzer Skid control buzzer signal Skid control buzzer ON: ON, OFF: OFF
      Stop Light SW Stop light switch signal Stop light switch ON: ON, OFF: OFF
      Parking Brake SW Parking brake switch signal Parking brake switch ON: ON, OFF: OFF
      TRC (TRAC)/VSC OFF SW VSC OFF switch signal VSC OFF switch ON: OFF, OFF: ON
      Gear Position Gear position information

      FAIL

      1st

      2nd

      3rd

      4th

      5th

      6th

      7th

      8th

      P, N

      R

      NOT R
      Shift Lever Position Shift lever position information

      FAIL

      1st

      2nd

      3rd

      4th

      5th

      6th/B

      D/M

      P, N

      R
      Operated System Operated system status

      ABS: ABS activated

      VSC: VSC activated

      TRC: TRC activated

      BA: BA activated

      HAB: HAB activated

      HA-CTRL: Hill-start assist control activated

      FAIL: Fail safe mode activated

      SYS: System prohibit activated

      NON: No operation activated
      Master Cylinder Sensor Master cylinder pressure sensor reading

      Brake pedal released: 0.3 to 0.9 V

      Brake pedal depressed: 0.8 to 4.5 V
      M/C Sensor Grade Master cylinder pressure sensor change Min.: -30 MPa/s, Max.: 225 MPa/s
      Yaw Rate Sensor Yaw rate sensor reading Min.: -128 deg/s, Max.: 127 deg/s
      Lateral G Lateral G

      Min.: -25.11 m/s2, Max.: 24.91 m/s2

      Forward and Rearward G Forward and backward G

      Min.: -25.11 m/s2, Max.: 24.91 m/s2

      FR Wheel Speed FR wheel speed Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph)
      FL Wheel Speed FL wheel speed Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph)
      RR Wheel Speed RR wheel speed Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph)
      RL Wheel Speed RL wheel speed Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph)
      Vehicle Speed Vehicle speed reading Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph)
      Vehicle Speed Grade Vehicle speed grade

      Min.: -25.11 m/s2, Max.: 24.91 m/s2

      Real Engine Torque Real engine torque Min.: -1024 Nm, Max.: 1023 Nm
      Accelerator Opening Angle % Accelerator opening Angle % Min.: 0 %, Max.: 128 %
      Brake Pedal Load Sensing SW Brake pedal load sensing switch signal Brake pedal load sensing switch ON: ON, OFF: OFF
      Inspection Mode Inspection mode

      OTHER: Normal mode

      INSPECT: Inspection mode
      Steering Angle Sensor Steering angle sensor reading

      Left turn: Increase

      Right turn: Decrease
      TRC/VSC Off Mode TRC/VSC off mode

      NORMAL: Normal mode

      TRC OFF: TRC off mode

      VSC OFF: VSC off mode

  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 on (IG).

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