2012 Lexus IS 350CFACTORY OEM SERVICE PROCEDURE

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 engine switch has been turned from off to on (IG) since the last time the ABS was activated.

      HINT: 

      • 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 engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.
    5. According to the display on the Techstream, select the trouble code data display with Freeze Frame Data.
      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 engine switch being turned on (IG) after storing Freeze Frame Data / 0 to 31 - -
      Buzzer Skid control buzzer or meter 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 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, FAIL, SYS or NON - ABS: ABS activated
      VSC: VSC activated
      TRC: TRAC activated
      BA: BA activated
      HAB: HAB activated
      PBA: PBA activated
      PB: PB 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 / 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.: -128 deg/s, Max.: 127 deg/s Vehicle stopped: 0 deg/s
      Turning right: -128 to 0 deg/s
      Turning left: 0 to 127 deg/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 Front wheel speed sensor RH reading / Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
      FL Wheel Speed Front wheel speed sensor LH reading / Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
      RR Wheel Speed Rear wheel speed sensor RH reading / Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
      RL Wheel Speed Rear wheel speed sensor LH reading / Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
      Vehicle Speed Maximum wheel speed sensor reading / Min.: 0 km/h (0 mph), Max.: 326.4 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
      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
      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 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
      FR Target Oil Pressure Front wheel RH target oil pressure reading / Min.: 0 MPa, Max.: 20 MPa - Changes according to the target wheel cylinder hydraulic pressure
      FL Target Oil Pressure Front wheel LH target oil pressure reading / Min.: 0 MPa, Max.: 20 MPa - Changes according to the target wheel cylinder hydraulic pressure
      RR Target Oil Pressure Rear wheel RH target oil pressure reading / Min.: 0 MPa, Max.: 20 MPa - Changes according to the target wheel cylinder hydraulic pressure
      RL Target Oil Pressure Rear wheel LH target oil pressure reading / Min.: 0 MPa, Max.: 20 MPa - Changes according to the target wheel cylinder hydraulic pressure
      Brake Pedal Load Sensing SW Brake pedal load sensing switch / ON or OFF ON: Brake pedal depressed beyond the specified point
      OFF: Brake pedal not depressed beyond the specified point      		 -
      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, TR(A)C OFF or VSC OFF NORMAL: Normal mode
      TRC OFF: TR(A)C 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 Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Clear the DTCs and Freeze Frame Data. Refer to DTC CHECK / CLEAR .
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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