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
    Engine Revolution

    Engine revolution

    Min: 0 rpm

    Max: 12800 rpm

    		 No significant fluctuation The engine is running 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 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 angle sensor abnormal

    NG(3): Communication Error

    		 -
    Steering Wheel Torque

    Steering wheel torque/

    Min.: -7.00 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 ignition 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 ignition switch on (IG) signal interruption/

    Unrec or Rec

    		 Unrec -
    Spd Sig Invalid Record

    Vehicle speed signal invalid record/

    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 -
    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 ignition 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 driving at high speeds 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, DC-DC Malf, Vhcl Spd Sig Malf, Batt Vol Keep

    		 - -
    Record 1 Key Cycle

    Number of times that the ignition switch was turned ON before Assist Limit Record 1 was stored/

    Min.: 0 times

    Max.: 65535 times

    		 - -
    Record 1 Key Cycle Elapsed Time

    Period of time that elapsed after the ignition switch was turned ON 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, DC-DC Malf, Vhcl Spd Sig Malf, Batt Vol Keep

    		 - -
    Record 2 Key Cycle

    Number of times that the ignition switch was turned ON 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 after the ignition switch was turned ON 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, DC-DC Malf, Vhcl Spd Sig Malf, Batt Vol Keep

    		 - -
    Record 3 Key Cycle

    Number of times that the ignition switch was turned ON 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 after the ignition switch was turned ON before Assist Limit Record 3 was stored/

    Min.: 0.0 s

    Max.: 53687091.1 s

    		 - -
    Current Key Cycle

    Number of times that the ignition switch was turned to ON since Assist Limit Record 1 was stored/

    Min.: 0 times

    Max.: 65535 times

    		 - -
    Current Key Cycle Elapsed Time

    Period of time that elapsed after Assist Limit Record 1 was stored before the ignition switch was turned to ON/

    Min.: 0.0 s

    Max.: 53687091.1 s

    		 - -
    Steering Angle

    Steering angle value/

    Min.: -3072.0 deg

    Max.: 3070.5 deg

    		 - During steering operation: Changes in proportion with steering wheel rotation
    The Number of DTCs

    Number of detected DTCs when freeze frame data stored/

    Min.: 0

    Max.: 255

    		 0 to 255 -