POWER STEERING SYSTEM DATA LIST / ACTIVE TEST


  1. DATA LIST

    Tech Tips

    Using the intelligent tester to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

    Note

    In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.


    1. Turn the ignition switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the ignition switch to ON.

    4. Turn the intelligent tester on.

    5. Enter the following menus: Chassis / EMPS / Data List.

    6. According to the display on the intelligent tester, read the Data List.

      EMPS
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Meter Vehicle Velocity

      Vehicle speed from meter/

      Min.: 0.0 km/h (0.0 mph)

      Max.: 300.0 km/h (186.4 mph)

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

      Engine speed/

      Min.: 0 rpm

      Max.: 12800 rpm

      		 No significant fluctuation Engine running at a constant speed
      Motor Actual Current*1

      Amount of current to motor/

      Min.: -327.68 A

      Max.: 327.67 A

      Value changes in proportion to steering effort

      - The value increases when turning right and decreases when turning left

      		 Engine running and steering wheel being turned
      Motor Actual Current*2

      Amount of current to motor/

      Min.: -327.68 A

      Max.: 327.67 A

      Value changes in proportion to steering effort

      - The value increases when turning left and decreases when turning right

      		 Engine running and steering wheel being turned
      Command Value Current*1

      Requested current to motor/

      Min.: -327.68 A

      Max.: 327.67 A

      Value changes in proportion to steering effort

      - The value increases when turning right and decreases when turning left

      		 Engine running and steering wheel being turned
      Command Value Current*2

      Requested current to motor/

      Min.: -327.68 A

      Max.: 327.67 A

      Value changes in proportion to steering effort

      - The value increases when turning left and decreases when turning right

      		 Engine running and steering wheel being turned
      Steering Angle Velocity

      Steering angle speed/

      Min.: -32768 deg/s

      Max.: 32767 deg/s

      Value changes in proportion to steering speed

      - The value increases when turning left and decreases when turning right

      		 Engine running and steering wheel being turned
      Thermistor Temperature

      ECU substrate temperature/

      Min.: -50.0°C (-58.0°F)

      Max.: 150.0°C (302.0°F)

      		 -50°C to 150°C (-58°F to 302°F) -
      PIG Power Supply

      Power source voltage to active motor/

      Min.: 0.0000 V

      Max.: 20.1531 V

      		 9 to 16 V Always
      IG Power Supply

      IG power source voltage/

      Min.: 0.0000 V

      Max.: 20.1531 V

      		 9 to 16 V Ignition switch ON
      Steering Angle Sens Sig

      Steering angle sensor signal state/

      OK or NG(1) or NG(2) or NG(3)

      OK: Steering angle sensor signal received

      NG(1): The learning has not completed

      NG(2): Steering Sensor Abnormal

      NG(3): Communication Error

      		 -
      Steering Wheel Torque

      Steering wheel torque/

      Min.: -327.68 Nm

      Max.: 7.00 Nm

      Value changes in proportion to steering effort

      - The value increases when turning left and decreases when turning right

      		 Engine running and steering wheel being turned
      Motor Rotation Angle

      Motor rotation angle/

      Min.: 0.000 deg

      Max.: 1441.770 deg

      		 During steering operation, motor rotation angle value changes from 0 to 360° Engine running and steering wheel being turned
      Command Val Current 2*1

      Requested current to motor/

      Min.: -327.68 A

      Max.: 327.67 A

      Value changes in proportion to steering effort

      - The value increases when turning left and decreases when turning right

      		 Engine running and steering wheel being turned
      Command Val Current 2*2

      Requested current to motor/

      Min.: -327.68 A

      Max.: 327.67 A

      Value changes in proportion to steering effort

      - The value increases when turning right and decreases when turning left

      		 Engine running and steering wheel being turned
      Motor Voltage

      Motor power supply voltage/

      Min.: 0.000 V

      Max.: 98.000 V

      		 9 to 16 V Always
      Motor Terminal Volt (U)

      Motor terminal voltage (U phase)/

      Min.: 0.000 V

      Max.: 98.000 V

      		 Value changes within 4 to 16 V range Engine running and steering wheel being turned
      Motor Terminal Volt (V)

      Motor terminal voltage (V phase)/

      Min.: 0.000 V

      Max.: 98.000 V

      		 Value changes within 4 to 16 V range Engine running and steering wheel being turned
      Motor Terminal Volt (W)

      Motor terminal voltage (W phase)/

      Min.: 0.000 V

      Max.: 98.000 V

      		 Value changes within 4 to 16 V range Engine running and steering wheel being turned
      Torque Sensor 1 Output

      Torque sensor voltage/

      Min.: 0.0000 V

      Max.: 4.9725 V

      		 2.3 to 2.7 V Engine running and steering wheel not being turned (without load)
      2.5 to 3.8 V Engine running and steering wheel being turned to the right with vehicle stopped
      1.2 to 2.5 V Engine running and steering wheel being turned to the left with vehicle stopped
      Torque Sensor 2 Output

      Torque sensor voltage/

      Min.: 0.0000 V

      Max.: 4.9725 V

      		 2.3 to 2.7 V Engine running and steering wheel not being turned (without load)
      1.2 to 2.5 V Engine running and steering wheel being turned to the right with vehicle stopped
      2.5 to 3.8 V Engine running and steering wheel being turned to the left with vehicle stopped
      TRQ1 Zero Point Value

      Torque sensor voltage/

      Min.: 0.0000 V

      Max.: 4.9725 V

      		 Values differ depending on vehicle Engine running and steering wheel not being turned
      TRQ2 Zero Point Value

      Torque sensor voltage/

      Min.: 0.0000 V

      Max.: 4.9725 V

      		 Values differ depending on vehicle Engine running and steering wheel not being turned
      IG ON/OFF Times

      Number of times of ignition switch ON/OFF after fail detection/

      Min.: 0 times

      Max.: 65535 times

      		 - This value indicates the number of times of ignition switch ON/OFF after the latest DTC detection.
      Motor Overheat Record

      Continuous overheat prevention control record/

      Unrec or Rec

      		 Unrec

      Unrec: Unrecorded

      Rec: Recorded
      Motor Lo Power Record

      PIG power source voltage drop record/

      Unrec or Rec

      		 Unrec

      Unrec: Unrecorded

      Rec: Recorded
      Eng Rev Inter Record

      Record of READY ON signal interruption/

      Unrec or Rec

      		 Unrec

      Unrec: Unrecorded

      Rec: Recorded
      Str Angle Inter Record

      Record of steering sensor signal interruption occurrence display/

      Unrec or Rec

      		 Unrec

      Unrec: Unrecorded

      Rec: Recorded
      Spd Sig Invalid Record

      Record of vehicle speed signal invalid/

      Unrec or Rec

      		 Unrec

      Unrec: Unrecorded

      Rec: Recorded
      Battery Voltage Lo Record

      Battery voltage reduction history/

      Min.: 0 times, Max.: 65535 times

      		 0 to 65535 -
      PS Assist Signal

      Status of the Record of Power Steering Assist Signal/

      OFF or ON

      		 OFF Ignition switch ON
      ON Engine running
      The Number of DTCs

      Number of detected DTCs when freeze frame data stored/

      Min.: 0

      Max.: 255

      		 0 to 255 -

    Tech Tips


    • *1: for LHD

    • *2: for RHD