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POWER STEERING SYSTEM FREEZE FRAME DATA

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  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 ignition switch on (IG) and park the vehicle on level ground. Check the freeze frame data by using the intelligent tester.


    1. Turn the ignition switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch on (IG).

    4. Turn the intelligent tester on.

    5. Check the freeze frame data by following the prompts on the intelligent tester display.

      Table 1. Power Steering ECU:
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Meter Vehicle Velocity

      Vehicle speed from meter:

      Min.: 0 km/h (0 mph)

      Max.: 300 km/h (187.5 mph)

      		 0 km/h (mph) Vehicle stopped
      No significant fluctuation Vehicle driven at a constant speed
      Engine Revolution

      Shows the engine speed:

      Min.: 0 rpm

      Max.: 12800 rpm

      		 No significant fluctuation Engine is running at a constant speed
      Motor Actual Current

      Amount of current to motor:

      Min.: -327.68 A

      Max.: 327.67 A

      		 Value changes in proportion to steering effort Power steering is in operation
      Command Value Current

      Demanded amount of current to motor:

      Min.: -327.68 A

      Max.: 327.68 A

      		 Value changes in proportion to steering effort Power steering is in operation
      Steering Angle Velocity

      Steering angle speed:

      Min.: -32768°/sec.

      Max.: 32767°/sec.

      		 Value changes in proportion to steering effort Steering wheel is turned
      Thermistor Temperature

      ECU substrate temperature:

      Min.: -40°C

      Max.: 150°C

      		 -40 to 150°C Ignition switch on (IG)
      PIG Power Supply

      Power source voltage to activate motor:

      Min.: 0 V

      Max.: 20.1531 V

      		 11 to 14 V Power steering is in operation
      IG Power Supply

      ECU power source voltage:

      Min.: 0 V

      Max.: 20.1531 V

      		 11 to 14 V Ignition switch on (IG)
      Motor Rotation Angle

      Motor rotation angle:

      Min.: 0°

      Max.: 360°

      		 During steering operation, motor rotation angle value changes from 0 to 360° Power steering is in operation
      Motor Voltage

      Motor power supply voltage:

      Min.: 0 V

      Max.: 45.955 V

      		 11 to 14 V Power steering is in operation
      Motor Terminal Volt (U)

      Motor terminal voltage (U phase):

      Min.: 0 V

      Max.: 46.667 V

      		 When the steering wheel is turned, a voltage between 1 V and approximately 1 V less than the battery voltage is displayed. Engine running and steering wheel is turned
      Motor Terminal Volt (V)

      Motor terminal voltage (V phase):

      Min.: 0 V

      Max.: 46.667 V

      		 When the steering wheel is turned, a voltage between 1 V and approximately 1 V less than the battery voltage is displayed. Engine running and steering wheel is turned
      Motor Terminal Volt (W)

      Motor Terminal voltage (W phase):

      Min.: 0 V

      Max.: 46.667 V

      		 When the steering wheel is turned, a voltage between 1 V and approximately 1 V less than the battery voltage is displayed. Engine running and steering wheel is turned
      Battery Voltage

      Battery voltage:

      Min.: 0 V

      Max.: 25.5 V

      		 11 to 14 V -
      PS Assist Signal

      Power steering assist signal:

      ON or OFF

      		 ON: Power steering assist signal is sent Ignition switch on (IG) and steering wheel is turned
      OFF: Power steering assist signal is not sent No steering load (in centered position)