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Home >> Lexus >> 2021 >> NX 300h Base >> Repair and Diagnosis >> Brakes >> Traction Control >> Electronically Controlled Brake System - Diagnostics - Introduction (1 Of 2) >> Electronically Controlled Brake System >> Freeze Frame Data [09/2017 - ] >> Freeze Frame Data [09/2017 - ]
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Freeze Frame Data [09/2017 - ]

  1. FREEZE FRAME DATA/INFORMATION 
    1. Using the Techstream, check the vehicle condition (ECU, sensor) when the brake system operates or a DTC is output.
    2. The freeze frame data that is recorded when a DTC is stored can be used to check the INF codes, but only for DTCs which can be stored.
  2. CHECK FREEZE FRAME DATA WHEN BRAKE SYSTEM OPERATES 
    1. Freeze frame data is stored when the brake system operates. The freeze frame data is updated each time the system operates.
    2. Once freeze frame data is stored when the system operates, it is not cleared until the DTC is cleared.
    3. The number of times (maximum: 31) the power switch has been turned from off to on (IG) since the last time the system was activated can be stored and displayed.

      HINT: 

      • When the vehicle is stopped (vehicle speed below 7 km/h), turning the power switch from off to on (IG) does not cause the value to increase.
      • The value "31" is displayed when the power switch was turned on (IG) more than 31 times.
    4. Check freeze frame data when the system operates
      1. Turn the power switch off.
      2. Connect the Techstream to the DLC3 and turn the power switch on (IG).
      3. Enter the following menus: Chassis / ABS/VSC/TRAC / Utility.
      4. Select "ABS History".

        Chassis > ABS/VSC/TRAC > Utility 

        Tester Display
        ABS History
      5. Check the freeze frame data when the system operates.
  3. CHECK FREEZE FRAME DATA AND INFORMATION WHEN DTC WAS STORED 
    1. Freeze frame data is stored when a DTC is output.
    2. Once freeze frame data is stored when a DTC is output, it is not updated or cleared until the DTC is cleared.
    3. The number of times (maximum: 31) the power switch has been turned from off to on (IG) since a DTC was output can be stored and displayed.

      HINT: 

      The value "31" is displayed when the power switch was turned on (IG) more than 31 times.

    4. Check the freeze frame data and INF code when a DTC is output.
      1. Turn the power switch off.
      2. Connect the Techstream to the DLC3 and turn the power switch on (IG).
      3. Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.

        Chassis > ABS/VSC/TRAC > Trouble Codes 

      4. Select a DTC to display the freeze frame data.
      5. Check the freeze frame data for the output DTC.

        HINT: 

        If an "INF Code" item appears when the freeze frame data is displayed, select and check the INF code.

        Chassis > ABS/VSC/TRAC 

        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        Detailed Freeze DTC Detailed code for Freeze Frame DTC Min.: 0, Max.: 65535 - Number of information codes (INF code) output is displayed
        Elapsed Time after Freeze Trigger Elapsed time after freeze trigger Min.: 0 msec, Max.: 500 msec - -
        Number of IG ON Number of times power switch turned on (IG) after Freeze Frame Data stored 0 to 31 - -
        Elapsed Time Elapsed time after power switch turned on (IG) Min.: 0 sec, Max.: 100661 sec - -
        Buzzer Meter buzzer ON or OFF ON: Buzzer on
        OFF: Buzzer off        		 -
        Stop Light SW Stop light switch assembly 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        		 -
        Reservoir Warning SW Brake fluid level warning switch ON or OFF ON: Reservoir level low
        OFF: Reservoir level normal        		 -
        Shift Lever Position Shift position information Fail, 1st-6th/B, D/M, P, N or R Actual shift position -
        Operated System Operated system status ABS, VSC, TRAC, BA, PB, PBA, HAB, HA-CTRL, TSC, SCB, Fail, Non or Sys - ABS: ABS activated
        VSC: VSC activated
        TRAC: TRAC activated
        BA: BA activated
        PB: PB activated
        PBA: PBA activated
        HAB: High power assist brake activated*
        HA-CTRL: Hill-start assist control activated
        TSC: Trailer sway control activated
        SCB: Secondary collision brake*
        Fail: Fail safe mode activated
        Non: No system activated
        Sys: System prohibited
        Stroke Sensor Brake pedal stroke sensor assembly Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.65 to 1.35 V Reading increases when brake pedal is depressed
        Stroke Sensor2 Brake pedal stroke sensor assembly 2 Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 3.65 to 4.35 V Reading decreases when brake pedal is depressed
        Accumulator Sensor Accumulator pressure sensor Min.: 0.00 V, Max.: 5.00 V Specified value: 2.90 to 4.20 V When brake fluid is stored in the accumulator: Accumulator pressure changes in accordance with volume of fluid stored in the accumulator
        Yaw Rate Sensor Yaw rate sensor Min.: -128 degrees/s, Max.: 127 degrees/s Vehicle stopped: 0 degrees/s
        Turning right: -128 to 0 degrees/s
        Turning left: 0 to 127 degrees/s        		 -
        Lateral G Lateral G Min.: -25.10 m/s2 , Max.: 24.90 m/s2 - During turning: Changes in proportion with lateral acceleration
        Forward and Rearward G Forward and backward G Min.: -25.10 m/s2 , Max.: 24.90 m/s2 - During acceleration/deceleration: Changes in proportion with acceleration
        FR Wheel Speed Front speed sensor RH Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
        FL Wheel Speed Front speed sensor LH Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
        RR Wheel Speed Rear speed sensor RH Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
        RL Wheel Speed Rear speed sensor LH Min.: 0 km/h (0 mph), Max.: 326 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 Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
        Accelerator Opening Angle % Percentage of accelerator pedal opening angle Min.: 0.0%, Max.: 128.0% Accelerator pedal released: 0.0% During accelerator pedal operation: Changes in proportion with the pedal movement
        ECB Motor Relay ABS motor relay ON or OFF ON: Relay on
        OFF: Relay off        		 ECB: Electronically Controlled Brake System
        ECB Main Relay ABS main relay ON or OFF ON: Relay on
        OFF: Relay off        		 ECB: Electronically Controlled Brake System
        IG1 Voltage Value IG1 voltage value Min.: 0.00 V, Max.: 20.00 V - Changes in proportion to auxiliary battery voltage
        IG2 Voltage Value IG2 voltage value Min.: 0.00 V, Max.: 20.00 V - Changes in proportion to auxiliary battery voltage
        BS1 Voltage Value BS voltage value Min.: 0.00 V, Max.: 20.00 V - Changes in proportion to auxiliary battery voltage
        VM1 Voltage Value VM1 voltage value Min.: 0.00 V, Max.: 20.00 V - Changes in proportion to auxiliary battery voltage
        Motor Relay Voltage Value Motor relay voltage value Min.: 0.00 V, Max.: 20.00 V During motor operation: 12.00 V
        No motor operation: 0.00 V        		 -
        Steering Angle Sensor Steering sensor Min.: - 3276.8 degrees, Max.: 3276.7 degrees Turning left: Increases
        Turning right: Decreases        		 -
        TRAC/VSC Off Mode TRAC/VSC off mode Normal, TRAC OFF or VSC OFF Normal: Normal mode
        TRAC OFF: TRAC off mode
        VSC OFF: VSC off mode        		 -
        Brake Hold Control Brake hold control status OFF, Hold, Release or EPB OFF: Brake hold control not operating
        Hold: Brake hold operating during brake hold control
        Release: Brake hold released during brake hold control
        EPB: Electric parking brake operating during brake hold control        		 EPB: Electric Parking Brake System
        Regulator Pressure Sensor Output Regulator pressure sensor output Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.10 to 0.90 V Reading increases when brake pedal is depressed
        Regulator Pressure Sensor Output Variant Regulator pressure sensor output variant Min.: -30 MPa/s, Max.: 225 MPa/s - -
        Wheel Cylinder Pressure Sensor Wheel cylinder pressure sensor Min.: 0.00 V, Max.: 5.00 V Brake pedal released: 0.10 to 0.90 V Reading increases when brake pedal is depressed
        SLA Solenoid Current Linear solenoid additional valve (SLA) current Min.: 0.00 A, Max.: 1.50 A Brake pedal released: 0.00 A -
        SLR Solenoid Current Linear solenoid reduction valve (SLR) current Min.: 0.00 A, Max.: 1.50 A Brake pedal released: 0.00 A -
        Target Oil Pressure Wheel target hydraulic pressure Min.: 0.00 Mpa, Max.: 20.00 Mpa - Changes according to the target wheel cylinder hydraulic pressure
        ECB Solenoid (SSC) Simulator cut solenoid valve (SSC) ON or OFF ON: Solenoid on
        OFF: Solenoid off        		 ECB: Electronically Controlled Brake System
        ECB Solenoid (SCC) Switching solenoid valve (SCC) ON or OFF ON: Solenoid on
        OFF: Solenoid off        		 ECB: Electronically Controlled Brake System
        ECB Solenoid (SMC) Master cut solenoid valve (SMC) ON or OFF ON: Solenoid on
        OFF: Solenoid off        		 ECB: Electronically Controlled Brake System
        ECB Solenoid (SRC) Regulator cut solenoid valve (SRC) ON or OFF ON: Solenoid on
        OFF: Solenoid off        		 ECB: Electronically Controlled Brake System
        Voltage of Stroke Sensor Voltage of brake pedal stroke sensor assembly Min.: -2.50 V, Max.: 2.49 V - -
        Voltage of Stroke Sensor2 Voltage of brake pedal stroke sensor assembly 2 Min.: -2.50 V, Max.: 2.49 V - -
        1. *: Not supported
  4. CLEAR FREEZE FRAME DATA AND INFORMATION 
    NOTE:

    Clearing the DTCs will also clear the Freeze Frame Data and information codes (INF codes).

    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Clear the DTCs and Freeze Frame Data.

      Refer to DTC CHECK / CLEAR [10/2014 - 05/2019] , or refer to DTC CHECK / CLEAR [05/2019 - ] 

      Chassis > ABS/VSC/TRAC > Clear DTCs 

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