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 ignition switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to 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 meter/

    Min.: 0.0 km/h (0.0 mph)

    Max.: 300.0 km/h (186.4 mph)

    0 km/h (0 mph) Ignition switch ON (READY) and vehicle stopped
    No significant fluctuation Ignition switch ON (READY) and vehicle driven at constant speed
    Motor Actual Current

    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

    Ignition 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

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

    Power source voltage to activate motor/

    Min.: 0.0000 V

    Max.: 20.1531 V

    9 to 16 V Always
    IG Power Supply

    ECU power source voltage/

    Min.: 0.0000 V

    Max.: 20.1531 V

    9 to 16 V Ignition switch ON (IG)
    Steering Wheel Torque

    Steering wheel torque/

    Min.: -327.68 Nm

    Max.: 7.00 Nm

    Value changes in proportion to steering effort Ignition switch ON (READY) and steering wheel being turned
    Torque Sensor 1 Output

    Torque sensor 1 output value/

    Min.: 0.0000 V

    Max.: 4.9725 V

    2.3 to 2.7 V Ignition switch ON (READY) and steering wheel not being turned (without load)
    2.5 to 3.8 V Ignition switch ON (READY) and steering wheel being turned to right with vehicle stopped
    1.2 to 2.5 V Ignition switch ON (READY) and steering wheel being turned to left with vehicle stopped
    Torque Sensor 2 Output

    Torque sensor 2 output value/

    Min.: 0.0000 V

    Max.: 4.9725 V

    2.3 to 2.7 V Ignition switch ON (READY) and steering wheel not being turned (without load)
    1.2 to 2.5 V Ignition switch ON (READY) and steering wheel being turned to right with vehicle stopped
    2.5 to 3.8 V Ignition switch ON (READY) and steering wheel being turned to left with vehicle stopped
    TRQ1 Zero Point Value

    Zero point value of torque sensor 1/

    Min.: 0.0000 V

    Max.: 4.9725 V

    2.3 to 2.7 V Ignition switch ON (READY) and steering wheel not being turned (without load)
    TRQ2 Zero Point Value

    Zero point value of torque sensor 2/

    Min.: 0.0000 V

    Max.: 4.9725 V

    2.3 to 2.7 V Ignition switch ON (READY) and steering wheel not being turned (without load)
    Motor Terminal Volt(+)

    Motor terminal M1 voltage/

    Min.: 0.0 V

    Max.: 25.5 V

    9 to 16 V Ignition switch ON (READY) and steering wheel being turned to right
    6 to 11V Ignition switch ON (READY) and steering wheel being turned to left
    Motor Terminal Volt(-)

    Motor terminal M2 voltage/

    Min.: 0.0 V

    Max.: 25.5 V

    6 to 11V Ignition switch ON (READY) and steering wheel being turned to right
    9 to 16 V Ignition switch ON (READY) and steering wheel turned to left
    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 IG ON/OFF after the latest DTC detection.
    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 -
    Eng Rev Inter Record

    Record of power switch on (IG) signal interruption/

    Unrec or Rec

    Unrec -
    Battery Voltage Lo Record

    Auxiliary battery voltage reduction history/

    Min.: 0 times, Max.: 65535 times

    0 to 65535 -
    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 -