POWER STEERING SYSTEM > DATA LIST / ACTIVE TEST

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DATA LIST

HINT:
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.

NOTICE:
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 intelligent tester to the DLC3.

  3. Turn the power switch on (IG).

  4. Turn the intelligent tester on.

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

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

    EMPS 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Meter Vehicle Velocity
    		Vehicle speed from meter/
    Min.: 0 km/h (0 mph)
    Max.: 300 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
    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 rises in left turn
    - The value descends in right turn
    		Power switch on (READY) and steering wheel being turned
    Command Value Current
    		Demanded amount of current to motor/
    Min.: -327.68 A
    Max.: 327.67 A
    		Value changes in proportion to steering effort
    - The value rises in left turn
    - The value descends in right turn
    		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 rises in left turn
    - The value descends in right turn
    		Power switch on (READY) and steering wheel being turned
    Thermistor Temperature
    		ECU substrate temperature/
    Min.: -50°C (-58°F)
    Max.: 150°C (302°F)
    		-50°C to 150°C (-58°F to 302°F)
    		Power switch on (READY)
    PIG Power Supply
    		Power source voltage to active motor/
    Min.: 0 V
    Max.: 20.1531 V
    		9 to 16 V
    		Power switch on (READY) and steering wheel being turned
    IG Power Supply
    		IG power source voltage/
    Min.: 0 V
    Max.: 20.1531 V
    		9 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): 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 Nm
    		Value changes in proportion to steering effort
    - The value rises in left turn
    - The value descends in right turn
    		Power switch on (READY) and steering wheel being turned
    Motor Rotation Angle
    		Motor rotation angle/
    Min.: 0 deg
    Max.: 1441.77 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
    		Demanded amount of current to motor/
    Min.: -327.68 A
    Max.: 327.67 A
    		Value changes in proportion to steering effort
    		Power switch on (READY) and steering wheel being turned
    PIG2 Voltage
    		Coil rear pressurization voltage/
    Min.: 0 V
    Max.: 98 V
    		9 to 16 V
    		Power switch on (READY) and steering wheel being not turned
    Value changes within 4 to 35 V range
    		Power switch on (READY) and steering wheel being turned
    Motor Voltage
    		Motor power supply voltage/
    Min.: 0 V
    Max.: 98 V
    		Approximately 30 V
    		Power switch on (READY) and steering wheel not being turned
    Value changes within 4 to 35 V range
    		Power switch on (READY) and steering wheel being turned
    Motor Terminal Volt (U)
    		Motor terminal voltage (U phase)/
    Min.: 0 V
    Max.: 98 V
    		Value changes within 4 to 35 V range
    		Power switch on (READY) and steering wheel being turned
    Motor Terminal Volt (V)
    		Motor terminal voltage (V phase)/
    Min.: 0 V
    Max.: 98 V
    		Value changes within 4 to 35 V range
    		Power switch on (READY) and steering wheel being turned
    Motor Terminal Volt (W)
    		Motor terminal voltage (W phase)/
    Min.: 0 V
    Max.: 98 V
    		Value changes within 4 to 35 V range
    		Power switch on (READY) and steering wheel being turned
    Torque Sensor 1 Output
    		Torque sensor voltage/
    Min.: 0 V
    Max.: 4.9725 V
    		2.3 to 2.7 V
    		Power switch on (READY) and steering wheel not 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 V
    Max.: 4.9725 V
    		2.3 to 2.7 V
    		Power switch on (READY) and steering wheel not 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 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 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 READY ON 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
    		-
    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
    		-