POWER STEERING SYSTEM DATA LIST / ACTIVE TEST


  1. DATA LIST

    Tech Tips

    Using the GTS 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 GTS to the DLC3.

    3. Turn the power switch on (IG).

    4. Turn the GTS on.

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

    6. According to the display on the GTS, read the Data List.

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

      Vehicle speed from speedometer/

      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
      Wheel Speed Right

      Rear wheel speed right/

      Min.: 0 km/h (0 MPH)

      Max.: 255 km/h (158 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
      Wheel Speed Left

      Rear wheel speed left/

      Min.: 0 km/h (0 MPH)

      Max.: 255 km/h (158 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

      Value changes in proportion to steering effort

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

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

      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

      		 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.: -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

      		 8 to 16 V Power switch on (IG)
      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

      		 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
      Command Val 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

      		 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 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 Power switch on (READY) 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 Power switch on (READY) 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 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 3.8 V Power switch on (READY) and steering wheel being turned to the right with vehicle stopped
      1.2 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)
      1.2 to 2.5 V Power switch on (READY) and steering wheel being turned to the right with vehicle stopped
      2.5 to 3.8 V Power switch on (READY) 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 Power switch on (READY) 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 Power switch on (READY) and steering wheel not being turned
      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
      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

      Auxiliary battery voltage reduction history/

      Min.: 0 times, Max.: 65535 times

      		 0 to 65535 times -
      PS Assist Signal

      Power steering assist signal/

      OFF or ON

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

      Ready status/

      OFF or Ready

      		 OFF or Ready -
      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 right and decreases when turning left

      		 Power switch on (READY) and steering wheel being turned
      Rotation Angle Sens Avg (SIN)

      Rotation angle sensor average (SIN)/

      Min.: 0.0000 V

      Max.: 4.9725 V

      		 - -
      Rotation Angle Sens Avg (COS)

      Rotation angle sensor average (COS)/

      Min.: 0.0000 V

      Max.: 4.9725 V

      		 - -
      Motor Overheat Limit Cnt (Normal)

      Number of times that assist limit was performed according to the estimated temperature of the portion where heat was generated in the power steering ECU assembly and motor coil/

      Min.: 0 times

      Max.: 255 times

      		 - -
      Assist Limit Cnt (Power Voltage Low)

      Number of times that assist limit was performed due to battery voltage having dropped to 9 V or below/

      Min.: 0 times

      Max.: 255 times

      		 - -
      Power Vol Low Prevention Limit Cnt

      Number of times that assist limit was performed due to battery voltage having dropped to 9.7 V or below/

      Min.: 0 times

      Max.: 255 times

      		 - -
      Eng Stall/Ready OFF Cnt

      Number of times that assist limit was performed after the engine stalled and the engine switch was turned off/

      Min.: 0 times

      Max.: 255 times

      		 - -
      Motor Overheat Limit Cnt (Motor Overload)

      Number of times that assist limit was performed to prevent the system from overheating in a case where the motor is overloaded because it is locked due to the steering wheel being turned to the full lock position or a tire hitting a curb/

      Min.: 0 times

      Max.: 255 times

      		 - -
      Assist Limit Cnt (Vehicle Spd Sig Malf)

      Number of times that assist power was set to a value suitable for high speed driving when high speed is detected due to an abnormal vehicle speed signal/

      Min.: 0 times

      Max.: 255 times

      		 - -
      Assist Limit Record 1

      Information of assist limit that was used in the past or is currently in use (latest history)/

      Unrec, Mtr Overheat, Pow Vol Low, Pow Vol Low Prevent, Eng Stall, Ready OFF, Mtr Overload, Vhcl Spd Sig Malf, Batt Vol Keep

      		 - -
      Record 1 Key Cycle

      Number of times that the power switch was turned on (IG) before Assist Limit Record 1 was stored/

      Min.: 0 times

      Max.: 65535 times

      		 - -
      Record 1 Key Cycle Elapsed Time

      Period of time that elapsed since the power switch was turned on (IG) before Assist Limit Record 1 was stored/

      Min.: 0.0 s

      Max.: 53687091.1 s

      		 - -
      Assist Limit Record 2

      Information of assist limit that was used in the past (second latest history)/

      Unrec, Mtr Overheat, Pow Vol Low, Pow Vol Low Prevent, Eng Stall, Ready OFF, Mtr Overload, Vhcl Spd Sig Malf, Batt Vol Keep

      		 - -
      Record 2 Key Cycle

      Number of times that the power switch was turned on (IG) after Assist Limit Record 2 was stored before Assist Limit Record 1 was stored/

      Min.: 0 times

      Max.: 65535 times

      		 - -
      Record 2 Key Cycle Elapsed Time

      Period of time that elapsed since the power switch was turned on (IG) before Assist Limit Record 2 was stored/

      Min.: 0.0 s

      Max.: 53687091.1 s

      		 - -
      Assist Limit Record 3

      Information of assist limit that was used in the past (third latest history)/

      Unrec, Mtr Overheat, Pow Vol Low, Pow Vol Low Prevent, Eng Stall, Ready OFF, Mtr Overload, Vhcl Spd Sig Malf, Batt Vol Keep

      		 - -
      Record 3 Key Cycle

      Number of times that the power switch was turned on (IG) after Assist Limit Record 3 was stored before Assist Limit Record 2 was stored/

      Min.: 0 times

      Max.: 65535 times

      		 - -
      Record 3 Key Cycle Elapsed Time

      Period of time that elapsed since the power switch was turned on (IG) before Assist Limit Record 3 was stored

      Min.: 0.0 s

      Max.: 53687091.1 s

      		 - -
      Current Key Cycle

      Number of times that the power switch was turned on (IG)/

      Min.: 0 times

      Max.: 65535 times

      		 - -
      Current Key Cycle Elapsed Time

      Time elapsed since the power switch was turned on (IG)/

      Min.: 0.0 s

      Max.: 53687091.1 s

      		 - -
      The Number of DTCs

      Number of detected DTCs when freeze frame data stored/

      Min.: 0

      Max.: 255

      		 0 to 255 -