POWER STEERING SYSTEM DATA LIST / ACTIVE TEST


  1. DATA LIST

    Tech Tips

    Using the Techstream 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 power switch off.

    2. Connect the Techstream to the DLC3.

    3. Turn the power switch on (IG).

    4. Turn the Techstream on.

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

    6. According to the display on the Techstream, 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) Power switch on (READY) and vehicle stopped
      No significant fluctuation Power switch on (READY) and vehicle driven at a constant speed
      Motor Actual Current

      Amount of current to motor/

      Min.: -327.68 A

      Max.: 327.67 A

      		 The value rises Power switch on (READY) and steering wheel being turned
      Command Value Current

      Demanded 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

      		 Power switch on (READY) 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

      		 Power switch on (READY) and steering wheel being turned
      Thermistor Temperature

      ECU substrate temperature/

      Min.: -40.0°C (-40.0°F)

      Max.: 150.0°C (302.0°F)

      		 -40°C to 150°C (-40°F to 302°F) Power switch on (READY)
      PIG Power Supply

      Power source voltage to active motor/

      Min.: 0.0000 V

      Max.: 20.1531 V

      		 9 to 16 V Power switch on (READY) and steering wheel being turned
      IG Power Supply

      IG power source voltage/

      Min.: 0.0000 V

      Max.: 20.1531 V

      		 9 to 16 V Power switch on (IG)
      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

      		 Power switch on (READY) 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° Power switch on (READY) and steering wheel being turned
      Motor Voltage

      Motor power supply voltage/

      Min.: 0.000 V

      Max.: 98.000 V

      		 9 to 16 V Power switch on (READY) and steering wheel being turned
      Motor Terminal Volt (U)

      Motor terminal voltage (A phase)/

      Min.: 0.000 V

      Max.: 98.000 V

      		 Value changes within 4 to 35 V range Power switch on (READY) and steering wheel being turned
      Motor Terminal Volt (V)

      Motor terminal voltage (B phase)/

      Min.: 0.000 V

      Max.: 98.000 V

      		 Value changes within 4 to 35 V range Power switch on (READY) and steering wheel being turned
      Motor Terminal Volt (W)

      Motor terminal voltage (C phase)/

      Min.: 0.000 V

      Max.: 98.000 V

      		 Value changes within 4 to 35 V range Power switch on (READY) 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 Power switch on (READY) and steering wheel not being turned (without load)
      2.5 to 4.7 V Power switch on (READY) and steering wheel being turned to the right with vehicle stopped
      0.3 to 2.5 V Power switch on (READY) 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 Power switch on (READY) and steering wheel not being turned (without load)
      0.3 to 2.5 V Power switch on (READY) and steering wheel being turned to the right with vehicle stopped
      2.5 to 4.7 V Power switch on (READY) and steering wheel being turned to the left with vehicle stopped
      IG ON/OFF Times

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

      Min.: 0 times

      Max.: 65535 times

      		 - This value indicates the number of times of power 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 engine speed signal interruption/

      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

      Auxiliary battery voltage reduction history/

      Min.: 0 times, Max.: 65535 times

      		 0 to 65535 -
      Battery Voltage

      Auxiliary battery voltage/

      Min.: 0.0 V

      Max.: 25.5 V

      		 9 to 16 V Power switch on (IG)
      PS Assist Signal

      Power steering assist signal/

      ON or OFF

      		 OFF Power switch on (IG)
      ON Power switch on (READY)
      Ready Status

      Ready status/

      Ready or OFF

      		 Ready or OFF -
      The Number of DTCs

      Number of detected DTCs when freeze frame data stored/

      Min.: 0

      Max.: 255

      		 0 to 255 -