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Home >> Lexus >> 2009 >> GS 450h >> Repair and Diagnosis >> Steering >> Power Steering >> Electronic Power Steering System (Diagnostics - Introduction) >> Electronic Power Steering System >> Freeze Frame Data >> Freeze Frame Data
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Freeze Frame Data

  1. FREEZE FRAME DATA 
    NOTE:
    • It is difficult to show the specified values (judgment values) clearly because freeze frame data values change significantly due to differences in measurement conditions, surroundings or vehicle conditions. For this reason, there may be a problem even when the values are within specifications.
    • Turn the power switch ON (IG) and park the vehicle on level ground. Check the freeze frame data by using the Techstream.
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch ON (IG) and check the freeze frame data by following the prompts the Techstream display screen. Enter the following menus: Chassis / EMPS / Utility / Freeze Frame Data.
      Tester Display Measurement Item/Range Normal Condition Reference Value
      Torque Sensor 1 Output Torque sensor 1 rotation angle/
      Min.: 0 deg, Max.: 360 deg
      Steering wheel is turned Value changes from 0 to 360° every 22.5° of steering angle
      Engine Revolution Engine revolution/
      Min.: 0 RPM, Max.: 8192 RPM
      Engine is running at a constant speed No significant fluctuation
      Torque Sensor 2 Output Torque sensor 2 rotation angle/
      Min.: 0 deg, Max.: 360 deg
      Steering wheel is turned Value changes from 0 to 360° every 22.5° of steering angle
      Meter Vehicle Velocity Vehicle speed from meter/
      Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph)
      Vehicle is stopped 0 km/h (0 mph)
      Vehicle is driven at a constant speed No significant fluctuation
      Motor Actual Current Amount of current to motor/
      Min.: -128 A, Max.: 127 A
      Power steering is in operation Value changes in proportion to steering effort
      Command Value Current Demanded amount of current to motor/
      Min.: -128 A, Max.: 127 A
      Power steering is in operation Value changes in proportion to steering effort
      Steering Angle Velocity Steering angle speed/
      Min.: -4096 deg/sec, Max.: 4064 deg/sec
      Steering wheel is turned Value changes in proportion to steering speed
      Thermistor Temperature ECU substrate temperature/
      Min.: -50 °C, Max.: 205°C
      Power switch ON (IG) -
      PIG Power Supply Power source voltage to activate motor/
      Min.: 0 V, Max.: 25.5 V
      Power steering is in operation 10 to 14 V
      IG Power Supply ECU power source voltage/
      Min.: 0 V, Max.: 25.5 V
      Power switch ON (IG) 10 to 14 V
      TRQ1 Zero Point Value Zero point value of torque sensor 1/
      Min.: 0 deg, Max.: 360 deg
      Steering wheel is not turned
      (without load)
      Values differ depending on vehicle
      TRQ2 Zero Point Value Zero point value of torque sensor 2/
      Min.: 0 deg, Max.: 360 deg
      Steering wheel is not turned
      (without load)
      Values differ depending on vehicle
      Steering Wheel Torque Steering torque/
      Min.: -7.0 N*m, Max.: 7.0 N*m
      Power switch ON (IG)
      Steering wheel is turned
      Value changes in proportion to steering effort
      Motor Rotation Angle Motor rotation angle/
      Min.: 0 deg, Max.: 360 deg
      Steering wheel is turned During steering operation, motor rotation angle value changes from 0 to 360°
      Command Val Current 2 Demanded amount of current to motor 2/
      Min.: -128 A, Max.: 127 A
      Power steering is in operation Value changes in proportion to steering effort
      PIG2 Voltage Coil rear pressurization voltage/
      Min.: 0 V, Max.: 64 V
      Power steering is in operation 10 to 15 V
      Motor Voltage Motor power source voltage/
      Min.: 0 V, Max.: 64 V
      Power steering is in operation 27 to 34 V
      Motor Terminal Volt (U) Motor terminal voltage (U phase)/
      Min.: 0 V, Max.: 64 V
      Steering wheel is not turned 12 to 15 V
      Steering wheel is turned 2 to 34 V
      Motor Terminal Volt (V) Motor terminal voltage (V phase)/
      Min.: 0 V, Max.: 64 V
      Steering wheel is not turned 12 to 15 V
      Steering wheel is turned 2 to 34 V
      Motor Terminal Volt (W) Motor terminal voltage (W phase)/
      Min.: 0 V, Max.: 64 V
      Steering wheel is not turned 12 to 15 V
      Steering wheel is turned 2 to 34 V