Power Steering System (For 2Az-Fe) Data List / Active Test

Steering. Corolla. Zre142 Aze141
Power Assist Systems. Corolla. Zre142 Aze141

  1. DATA LIST

Power Steering System (For 2Az-Fe) -- Data List / Active Test



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.
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 ignition switch off.

  2. Connect the Techstream to the DLC3.

  3. Turn the ignition switch on (IG).

  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 km/h (0 mph)
    Max.: 300 km/h (186.4 mph)
    		0 km/h (0 mph)
    		Vehicle stopped
    No significant fluctuation
    		Vehicle driven at a constant speed
    Engine Revolution
    		Engine revolution/
    Min.: 0 rpm
    Max.: 12800 rpm
    		No significant fluctuation
    		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
    		Power steering is in operation
    Command Value Current
    		Demanded amount of current to motor/
    Min.: -327.68 A
    Max.: 327.67 A
    		Value changes in proportion to steering effort
    		Power steering is in operation
    Steering Angle Velocity
    		Steering angle speed/
    Min.: -32768 deg/s
    Max.: 32767 deg/s
    		Value changes in proportion to steering effort
    		Steering wheel is turned
    Thermistor Temperature
    		ECU substrate temperature/
    Min.: -40°C (-40°F)
    Max.: 150°C (302°F)
    		-40°C to 150°C (-40°F to 302°F)
    		Ignition switch on (IG)
    PIG Power Supply
    		Power source voltage to active motor/
    Min.: 0 V
    Max.: 20.1531 V
    		11 to 14 V
    		Power steering is in operation
    IG Power Supply
    		ECU power source voltage/
    Min.: 0 V
    Max.: 20.1531 V
    		11 to 14 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 is received
    NG(1): The learning has not completed
    NG(2): Steering sensor is 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
    		Ignition switch on (IG) and power steering is in operation
    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 steering in operation
    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 steering is in operation
    PIG2 Voltage
    		Coil rear pressurization voltage/
    Min.: 0 V
    Max.: 45.955 V
    		Approximately 27 V
    		Ignition switch on (IG) and steering wheel is not turned
    Value changes within 4 to 35 V range
    		Ignition switch on (IG) and steering wheel is turned
    Motor Voltage
    		Motor power supply voltage/
    Min.: 0 V
    Max.: 45.955 V
    		Approximately 27 V
    		Ignition switch on (IG) and steering wheel is not turned
    Value changes within 4 to 35 V range
    		Ignition switch on (IG) and steering wheel is turned
    Motor Terminal Volt(U)
    		Motor terminal voltage (U phase)/
    Min.: 0 V
    Max.: 46.667 V
    		Value changes within 4 to 35 V range
    		Ignition switch on (IG) and steering wheel is turned
    Motor Terminal Volt(V)
    		Motor terminal voltage (V phase)/
    Min.: 0 V
    Max.: 46.667 V
    		Value changes within 4 to 35 V range
    		Ignition switch on (IG) and steering wheel is turned
    Motor Terminal Volt(W)
    		Motor terminal voltage (W phase)/
    Min.: 0 V
    Max.: 46.667 V
    		Value changes within 4 to 35 V range
    		Ignition switch on (IG) and steering wheel is turned
    Torque Sensor 1 Output
    		Torque sensor voltage/
    Min.: 0 V
    Max.: 5 V
    		2.3 to 2.7 V
    		Ignition switch on (IG) and steering wheel is not turned (without load)
    2.5 to 3.8 V
    		Ignition switch on (IG) and steering wheel turned to right with vehicle stopped
    1.2 to 2.5 V
    		Ignition switch on (IG) and steering wheel turned to left with vehicle stopped
    Torque Sensor 2 Output
    		Torque sensor voltage/
    Min.: 0 V
    Max.: 5 V
    		2.3 to 2.7 V
    		Ignition switch on (IG) and steering wheel is not turned (without load)
    1.2 to 2.5 V
    		Ignition switch on (IG) and steering wheel turned to right with vehicle stopped
    2.5 to 3.8 V
    		Ignition switch on (IG) and steering wheel turned to left with vehicle stopped
    TRQ1 Zero Point Value
    		Torque sensor voltage/
    Min.: 0 V
    Max.: 5 V
    		Values differ depending on vehicle
    		Steering wheel is not turned
    TRQ2 Zero Point Value
    		Torque sensor voltage/
    Min.: 0 V
    Max.: 5 V
    		Values differ depending on vehicle
    		Steering wheel is not turned
    IG ON/OFF Times
    		Number of times of ignition switch ON/OFF after fail detection/
    Min.: 0 time
    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 engine revolution signal 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 vehicle speed signal invalid/
    Unrec or Rec
    		Unrec
    		-
    PS Assist Signal
    		Power steering assist signal/
    ON or OFF
    		OFF
    		No steering load (in neutral position)
    ON
    		Ignition switch on (IG) and steering wheel is turned
    The Number of DTCs
    		Number of detected DTCs when freeze frame data stored/
    Min.: 0
    Max.: 255
    		0 to 255
    		-