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Home >> Lexus >> 2016 >> RX 350 Base, FWD >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Dynamic Radar Cruise Control System - Diagnostics - Introduction >> Dynamic Radar Cruise Control System >> Freeze Frame Data [08/2019 - ] >> Freeze Frame Data [08/2019 - ]
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Freeze Frame Data [08/2019 - ]

  1. CHECK FREEZE FRAME DATA 

    HINT: 

    The ECU records vehicle and driving condition information as freeze frame data the moment a DTC is stored.

    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Radar Cruise 1*1 or Radar Cruise 2*2 / Trouble Codes.

      Powertrain > Cruise Control > Trouble Codes 

      Powertrain > Radar Cruise2 > Trouble Codes 

      1. *1: Output from the ECM
      2. *2: Output from the forward recognition camera
    5. Select the DTCs (with snow icon) for which freeze frame data is recorded.
      NOTE:

      The operating conditions the moment a DTC is stored are recorded as freeze frame data. Furthermore, only the latest 3 DTCs can be stored by the forward recognition camera.

  2. LIST OF FREEZE FRAME DATA 

    Powertrain > Cruise Control 

    Tester Display Measurement Item Range Normal Condition Diagnostic Note
    Cruise Vehicle Speed Vehicle speed Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph) Actual vehicle speed -
    Cruise Memory Vehicle Speed Stored vehicle speed Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph) Stored vehicle speed -
    Cruise Request Throttle Opening Angle Cruise requested position 0.00 to 124.99 deg Changes depending on the conditions of the dynamic radar cruise control system -
    Cruise Target Acceleration Target acceleration while in cruise control mode -13.10 to 13.10 m/s2 Current value displayed -
    Driving Support ECU Target Acceleration - - - Cannot be used
    Cruise Request Driving Force Cruise request torque signal -10.00 to 9.92 kN Changes depending on the conditions of the dynamic radar cruise control system -
    Cruise Request Driving Force Feedback Status - - - Cannot be used
    Cruise Control Permission Condition - - - Cannot be used
    Cruise Control Condition - - - Cannot be used
    Cruise Main Switch Operation Condition Cruise control main switch status OFF or ON OFF: Cruise control main switch not pushed
    ON: Cruise control main switch pushed
    -
    Accelerator Pedal Condition of the accelerator pedal during cruising OFF or ON OFF: Accelerator pedal released
    ON: Accelerator pedal depressed
    -
    Cruise Brake Cancel Switch Cruise control brake cancel condition OFF or ON OFF: Brake pedal released
    ON: Brake pedal depressed
    -
    Stop Light Switch Main-CPU Stop light switch signal OFF or ON OFF: Brake pedal released
    ON: Brake pedal depressed
    -
    Stop Light Switch Sub-CPU - - - Cannot be used
    Request Manual Cancel - - - Cannot be used
    Request Automatic Cancel - - - Cannot be used
    Cruise Brake Control Decision Cruise brake control decision OFF or ON OFF: Cruise brake deactivated
    ON: Cruise brake activated
    -
    Cruise Brake Control Permission Condition - - - Cannot be used

    Powertrain > Radar Cruise2 

    Tester Display Measurement Item Range Normal Condition Diagnostic Note
    Total Distance Traveled - - - Cannot be used
    Total Distance Traveled - Unit - - - Cannot be used
    Cruise Control Mode Cruise control mode signal Vehicle-to-vehicle Distance Control (All Speed), Vehicle-to-vehicle Distance Control (Hi Speed) or Constant Speed Control Vehicle-to-vehicle Distance Control (All Speed): Vehicle-to-vehicle distance control mode (w/ Full-speed range following function)
    Vehicle-to-vehicle Distance Control (Hi Speed): Vehicle-to-vehicle distance control mode (w/o Full-speed range following function)
    Constant Speed Control: Constant speed mode
    -
    Estimated Vehicle Acceleration Estimated Vehicle Acceleration Min.: -5.00 m/s2 , Max.: 5.00 m/s2 Current value displayed -
    Accelerator Pedal Idle Accelerator pedal idle position signal OFF or ON OFF: Accelerator pedal depressed
    ON: Accelerator pedal released
    -
    Forward Vehicle Distance Distance to preceding vehicle Min.: 0 m, Max.: 255 m Current value displayed -
    Forward Vehicle Relative Speed Relative speed against preceding vehicle -128 to 127 km/h Current value displayed -
    Cruise Warning Request Forward vehicle approach warning signal OFF or ON OFF: Forward vehicle not approaching
    ON: Forward vehicle approaching
    -
    Accelerator Over Ride Accelerator pedal position signal during cruising OFF or ON OFF: Accelerator over ride OFF
    ON: Accelerator over ride ON
    -
    Front Radar Sensor High Temperature Millimeter wave radar sensor assembly high temperature abnormality Normal or High Temperature Normal: Millimeter wave radar sensor assembly temperature is normal
    High Temperature: Millimeter wave radar sensor assembly temperature is high
    • "High Temperature" displayed when the millimeter wave radar sensor assembly is in the following condition
      • When the ambient temperature of the millimeter wave radar sensor assembly is 70°C (158°F) or more, such as when the vehicle is left alone in an extremely hot environment
    • When "High Temperature" is displayed, and the dynamic radar cruise control system is in one of the following conditions
      • X2027 in the vehicle control history (Front Radar Sensor Outside Guaranteed Operating Temperature) is stored
      • "Radar Cruise Control Unavailable" is displayed on the multi-information display
    • If "High Temperature" is displayed, refer to X2027 in the front radar sensor system vehicle control history
    Front Radar Sensor Low Voltage Millimeter wave radar sensor assembly low voltage abnormality Normal or Low Voltage Normal: Millimeter wave radar sensor assembly voltage is normal
    Low Voltage: Millimeter wave radar sensor assembly voltage is low
    • "Low Voltage" displayed when the millimeter wave radar sensor assembly is in the following condition
      • When the input voltage is approximately 8 V or less, immediately after turning the engine switch is started
    • When "Low Voltage" is displayed, and the dynamic radar cruise control system is in one of the following conditions
      • X2028 in the vehicle control history (Front Radar Sensor Outside Guaranteed Operating Voltage) is stored
      • "Radar Cruise Control Unavailable" is displayed on the multi-information display
    • If "Low Voltage" is displayed, refer to X2028 in the front radar sensor system vehicle control history