POWER STEERING SYSTEM DATA LIST / ACTIVE TEST

  1. DATA LIST

    Tip:

    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 power switch off.

    2. Connect the GTS to the DLC3.

    3. Turn the power switch 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.

      Chassis > EMPS > Data List

      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)

      • Power switch on (READY) and vehicle stopped: 0 km/h (0 mph)

      • Power switch on (READY) and vehicle driven at a constant speed: No significant fluctuation

      -

      Motor Actual Current

      Amount of current to motor

      Min.: -327.68 A

      Max.: 327.67 A

      Power switch on (READY) and steering wheel being turned: The value rises

      -

      Command Value Current

      Requested current to motor

      Min.: -327.68 A

      Max.: 327.67 A

      Power switch on (READY) and steering wheel being turned: Value changes in proportion to steering effort

      -The value increases when turning left and decreases when turning right

      -

      Steering Angle Velocity

      Steering angle speed

      Min.: -32768 deg/s

      Max.: 32767 deg/s

      Power switch on (READY) and steering wheel being turned: Value changes in proportion to steering speed

      -The value increases when turning left and decreases when turning right

      -

      Thermistor Temperature

      ECU substrate temperature

      Min.: -50.0°C (-58.0°F)

      Max.: 150.0°C (302.0°F)

      Power switch on (READY): -50°C to 150°C (-58°F to 302°F)

      -

      PIG Power Supply

      Power source voltage to active motor

      Min.: 0.0000 V

      Max.: 20.1531 V

      Power switch on (READY) and steering wheel being turned: 11 to 14 V

      -

      IG Power Supply

      IG power source voltage

      Min.: 0.0000 V

      Max.: 20.1531 V

      power switch on (IG): 11 to 14 V

      -

      Steering Wheel Torque

      Steering wheel torque

      Min.: -327.68 Nm

      Max.: 7.00 Nm

      Power switch on (READY) and steering wheel being turned: Value changes in proportion to steering effort

      -The value increases when turning left and decreases when turning right

      -

      Motor Rotation Angle

      Motor rotation angle

      Min.: 0.000 deg

      Max.: 1441.770 deg

      Power switch on (READY) and steering wheel being turned: During steering operation, motor rotation angle value changes from 0 to 360 deg

      -

      Motor Voltage

      Motor power supply voltage

      Min.: 0.000 V

      Max.: 98.000 V

      Power switch on (READY) and steering wheel being turned: 11 to 14 V

      -

      Motor Terminal Volt(U)

      Motor terminal voltage (A phase)

      Min.: 0.000 V

      Max.: 98.000 V

      Power switch on (READY) and steering wheel being turned: Value changes within 4 to 35 V range

      -

      Motor Terminal Volt(V)

      Motor terminal voltage (B phase)

      Min.: 0.000 V

      Max.: 98.000 V

      Power switch on (READY) and steering wheel being turned: Value changes within 4 to 35 V range

      -

      Motor Terminal Volt(W)

      Motor terminal voltage (C phase)

      Min.: 0.000 V

      Max.: 98.000 V

      Power switch on (READY) and steering wheel being turned: Value changes within 4 to 35 V range

      -

      Torque Sensor 1 Output

      Torque sensor voltage

      Min.: 0.0000 V

      Max.: 4.9725 V

      • Power switch on (READY) and steering wheel not being turned (without load): 2.3 to 2.7 V

      • Power switch on (READY) and steering wheel being turned to the right with vehicle stopped: 2.5 to 4.7 V

      • Power switch on (READY) and steering wheel being turned to the left with vehicle stopped: 0.3 to 2.5 V

      -

      Torque Sensor 2 Output

      Torque sensor voltage

      Min.: 0.0000 V

      Max.: 4.9725 V

      • Power switch on (READY) and steering wheel not being turned (without load): 2.3 to 2.7 V

      • Power switch on (READY) and steering wheel being turned to the right with vehicle stopped: 0.3 to 2.5 V

      • Power switch on (READY) and steering wheel being turned to the left with vehicle stopped: 2.5 to 4.7 V

      -

      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 engine speed signal interruption

      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

      Number of times auxiliary battery voltage is low

      Min.: 0 times

      Max.: 65535 times

      0 to 65535

      -

      Battery Control Count (Body ECU)

      Number of auxiliary battery load control operations

      Min.: 0 times

      Max.: 65535 times

      0 to 65535

      -

      Battery Voltage

      Auxiliary battery voltage

      Min.: 0.0 V

      Max.: 25.5 V

      power switch on (IG): 11 to 14 V

      -

      PS Assist Signal

      Power steering assist signal

      ON or OFF

      • Except power switch on (READY): OFF

      • Power switch on (READY): ON

      -

      Ready Status

      Ready status

      OFF or Ready

      • Except power switch on (READY): OFF

      • Power switch on (READY): ON

      -

      The Number of DTCs

      Number of detected DTCs when freeze frame data stored

      Min.: 0

      Max.: 255

      0 to 255

      -
Tip:

When the value displayed for "Battery Voltage Lo Record" in the Data List is not 0 with the auxiliary battery voltage low, the system is limiting the rear window defogger, PTC heater, outer mirror heater and windshield deicer operation. In this case, inspect the charging system.

Refer to the following procedures.

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