ELECTRONIC 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 tester on.

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

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

    Tester Display Measurement Item/Range Normal Condition Diagnostic Note
    Torque Sensor 1 Output

    Torque sensor 1 output value:

    Min.: 0 V, Max.: 4.9725V

    		 2.3 to 2.7 V Steering wheel not turned (without load)
    2.5 to 4.7 V Steering wheel turned to right with vehicle stopped
    0.3 to 2.5 V Steering wheel turned to left with vehicle stopped
    Torque Sensor 2 Output

    Torque sensor 2 output value:

    Min.: 0 V, Max.: 4.9725V

    		 2.3 to 2.7 V Steering wheel not turned (without load)
    2.5 to 4.7 V Steering wheel turned to right with vehicle stopped
    0.3 to 2.5 V Steering wheel turned to left with vehicle stopped
    Torque Sensor 3 Output

    Torque value for assist control:

    Min.: 0 V, Max.: 4.9725V

    		 2.3 to 2.7 V Steering wheel not turned (without load)
    0.3 to 2.5 V Steering wheel turned to right with vehicle stopped
    2.5 to 4.7 V Steering wheel turned to left with vehicle stopped
    Meter Vehicle Velocity

    Vehicle speed from meter:

    Min.: 0 km/h, Max.: 255 km/h

    		 0 km/h Vehicle stopped
    No significant fluctuation Vehicle driven at constant speed
    Engine Revolution

    Engine revolution

    Min: 0 rpm

    Max: 8160 rpm

    		 No significant fluctuation The engine is running at constant speed
    Motor Actual Current

    Amount of current to motor:

    Min.: -128 A, Max.: 127 A

    		 Value changes in proportion to steering effort -
    Command Value Current

    Demanded amount of current to motor:

    Min.: -128 A, Max.: 127 A

    		 Value changes in proportion to steering effort -
    Thermistor Temperature

    ECU substratum temperature:

    Min.: -50°C, Max.: 205°C

    		 - Ignition switch ON
    PIG Power Supply

    Power source voltage to activate motor:

    Min.: 0 V, Max.: 25.5 V

    		 11 to 14 V Power steering in operation
    IG Power Supply

    ECU power source voltage:

    Min.: 0 V, Max.: 25.5 V

    		 11 to 14 V -
    TRQ1 Zero Point Value

    Zero point value of torque sensor 1:

    Min.: 0 V, Max.: 4.9725 V

    		 2.3 to 2.7 V Steering wheel not turned (without load)
    TRQ2 Zero Point Value

    Zero point value of torque sensor 2:

    Min.: 0 V, Max.: 4.9725 V

    		 2.3 to 2.7 V Steering wheel not turned (without load)
    TRQ3 Zero Point Value

    Zero point value of torque sensor for assist control:

    Min.: 0 V, Max.: 4.9725 V

    		 2.3 to 2.7 V Steering wheel not turned (without load)
    Motor Terminal Volt(+)

    Motor terminal M1 voltage:

    Min.: 0 V, Max.: 25.5 V

    		 11 to 14 V Steering wheel turned to right
    Motor Terminal Volt(-)

    Motor terminal M2 voltage:

    Min.: 0 V, Max.: 25.5 V

    		 11 to 14 V Steering wheel turned to left
    Motor Overheat Record

    Continuous overheat prevention control record:

    Unrec or Rec

    		 Unrec -
    Motor Lo Power Record

    PIG power source voltage drop record:

    Unrec or Rec

    		 Unrec -
    Control Mode

    Codes indicating DTC detection timing during ECU control displayed in hexadecimal

    Min.: 0, Max.: 255

    		 - -
    IG ON/OFF Times

    Number of times ignition switch ON after DTC detection:

    Min.: 0 time, Max.: 255 times

    		 - -
    The Number of DTCs

    Number of detected DTCs when freeze frame data stored:

    Min.: 0, Max.: 255

    		 - -
    ECU Identification ECU identification information - -
    Test Mode Status

    Selected mode:

    Normal or Test

    		 - -