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Data List / Active Test

  1. DATA LIST 

    HINT: 

    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 ignition switch off.
    2. Connect the Techstream to the DLC3.
    3. Turn the ignition switch to ON.
    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 mph)
      Max.: 300.0 km/h (186.4 mph)      		 0 km/h (0 mph) The vehicle is stopped.
      No significant fluctuation The vehicle is driven at a constant speed.
      Engine Revolution Engine speed/
      Min.: 0 rpm
      Max.: 12800 rpm      		 No significant fluctuation The 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 The engine is running and the steering wheel is being turned.
      Command Value Current Amount of current requested for motor/
      Min.: -327.68 A
      Max.: 327.67 A      		 Value changes in proportion to steering effort The engine is running and the steering wheel is being turned.
      Steering Angle Velocity Steering angle speed/
      Min.: -32768 deg/s
      Max.: 32767 deg/s      		 Value changes in proportion to steering effort The engine is running and the steering wheel is being turned.
      Thermistor Temperature ECU substrate temperature/
      Min.: -40.0°C (-40°F)
      Max.: 150.0°C (302°F)      		 -40°C to 150°C (-40°F to 302°F) The ignition switch is ON.
      PIG Power Supply Power source voltage sent to active motor/
      Min.: 0.0000 V
      Max.: 20.1531 V      		 11 to 14 V The engine is running and the power steering is operating.
      IG Power Supply ECU power source voltage/
      Min.: 0.0000 V
      Max.: 20.1531 V      		 11 to 14 V The ignition switch is 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): Learning 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 engine is running and the steering wheel is 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° The engine is running and the steering wheel is being turned.
      Command Val Current 2 Amount of current requested for motor/
      Min.: -327.68 A
      Max.: 327.67 A      		 Value changes in proportion to steering effort The engine is running and the steering wheel is being turned.
      PIG2 Voltage Rear pressurization voltage of coil/
      Min.: 0.000 V
      Max.: 45.955 V      		 11 to 14 V The engine is running.
      Motor Voltage Motor power supply voltage/
      Min.: 0.000 V
      Max.: 45.955 V      		 Approximately 27 V The engine is running and the steering wheel is not being turned.
      Value changes within 4 to 35 V range The engine is running and the steering wheel is being turned.
      Motor Terminal Volt(U) Motor terminal voltage (U phase)/
      Min.: 0.000 V
      Max.: 46.667 V      		 Value changes within 4 to 35 V range The engine is running and the steering wheel is being turned.
      Motor Terminal Volt(V) Motor terminal voltage (V phase)/
      Min.: 0.000 V
      Max.: 46.667 V      		 Value changes within 4 to 35 V range The engine is running and the steering wheel is being turned.
      Motor Terminal Volt(W) Motor terminal voltage (W phase)/
      Min.: 0.000 V
      Max.: 46.667 V      		 Value changes within 4 to 35 V range The engine is running and the steering wheel is being turned.
      Torque Sensor 1 Output Torque sensor 1 output voltage/
      Min.: 0.0000 V
      Max.: 4.9725 V      		 2.3 to 2.7 V The engine is running and the steering wheel is not being turned (no load).
      2.5 to 3.8 V The engine is running and the steering wheel is turned to the right with the vehicle stopped.
      1.2 to 2.5 V The engine is running and the steering wheel is turned to the left with the vehicle stopped.
      Torque Sensor 2 Output Torque sensor 2 output voltage/
      Min.: 0.0000 V
      Max.: 4.9725 V      		 2.3 to 2.7 V The engine is running and the steering wheel is not being turned (no load).
      1.2 to 2.5 V The engine is running and the steering wheel is turned to the right with the vehicle stopped.
      2.5 to 3.8 V The engine is running and the steering wheel is turned to the left with the vehicle stopped.
      TRQ1 Zero Point Value Torque sensor 1 zero point voltage/
      Min.: 0.0000 V
      Max.: 4.9725 V      		 Value differs depending on vehicle The engine is running and the steering wheel is not being turned.
      TRQ2 Zero Point Value Torque sensor 2 zero point voltage/
      Min.: 0.0000 V
      Max.: 4.9725 V      		 Value differs depending on vehicle The engine is running and the steering wheel is not being turned.
      IG ON/OFF Times Number of times of ignition switch turned to ON/off after detection of failure/
      Min.: 0 times
      Max.: 65535 times      		 0 times This value indicates the number of times of the engine has been turned on/off after the latest DTC storage.
      PS Assist Signal Power steering assist signal/
      ON or OFF      		 OFF The engine is not running.
      ON The engine is running.
      The Number of DTCs Number of stored DTCs when freeze frame data stored/
      Min.: 0
      Max.: 255      		 0 -
  2. CONTROL HISTORY (DATA LIST) 
    EMPS

    Tester Display Measurement Item/Range Normal Condition Diagnostic Note
    Motor Overheat Record Record of continuous overheat prevention control/
    Unrec or Rec    		 Unrec -
    Motor Lo Power Record Record of PIG power source voltage drop/
    Unrec or Rec    		 Unrec -
    Eng Rev Inter Record Record of engine speed interruption/
    Unrec or Rec    		 Unrec -
    Str Angle Inter Record Record of steering sensor signal interruption occurrence display/
    Unrec or Rec    		 Unrec -
    Spd Sig Invalid Record Record of invalid vehicle speed signal/
    Unrec or Rec    		 Unrec -
    Battery Voltage Lo Record Battery voltage reduction history/
    Min.: 0 times
    Max.: 65535 times    		 0 times -

    HINT: 

    • The amount of power assist may be decreased to prevent the motor and ECUs from overheating if the steering wheel is continuously turned when the vehicle is either stopped or driven at a low speed, or if the steering wheel is kept at either full lock position for a long time. In such cases, the amount of power assist returns to normal if the steering wheel is not turned for approximately 10 minutes with the engine idling.
    • If the battery is not sufficiently charged or the voltage decreases temporarily, the amount of power assist will be reduced and the power steering warning light will come on. In such cases, the amount of power assist returns to normal when the battery voltage recovers.
    • When any value other than 0 is displayed for the battery voltage reduction history, inspect the charging system. Refer to ON-VEHICLE INSPECTION .
  3. ACTIVE TEST 

    HINT: 

    Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.

    1. Turn the ignition switch off.
    2. Connect the Techstream to the DLC3.
    3. Turn the ignition switch to ON.
    4. Turn the Techstream on.
    5. Enter the following menus: Body Electrical / Combination Meter / Active Test.
    6. According to the display on the Techstream, perform the Active Test.
      COMBINATION METER

      Tester Display Test Part Control Range Diagnostic Note
      Indicat. EPS Power steering warning light ON or OFF Perform the test with the vehicle stopped and the engine idling.
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