DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Steering >> Power Steering >> Power Steering System - Diagnostics - Introduction >> Power Steering System >> Data List / Active Test [12/2019 - 11/2023] >> Data List / Active Test [12/2019 - 11/2023]

Data List / Active Test [12/2019 - 11/2023]

  1. DATA LIST 

    HINT: 

    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.
    4. Turn the GTS on.
    5. Enter the following menus: Chassis / EMPS / Data List.
    6. Read the Data List according to the display on the GTS.

      Chassis > EMPS > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Meter Vehicle Velocity Vehicle speed from speedometer Min.: 0.0 km/h (0.0 MPH)
      Max.: 300.0 km/h (186.4 MPH)
      • 0 km/h (0 MPH): Engine running and vehicle stopped
      • No significant fluctuation: Engine running and vehicle driven at a constant speed
      		 -
      Wheel Speed Right Rear right wheel speed Min.: 0 km/h (0 MPH)
      Max.: 255 km/h (158 MPH)
      • 0 km/h (0 MPH): Engine running and vehicle stopped
      • No significant fluctuation: Engine running and vehicle driven at a constant speed
      		 -
      Wheel Speed Left Rear left wheel speed Min.: 0 km/h (0 MPH)
      Max.: 255 km/h (158 MPH)
      • 0 km/h (0 MPH): Engine running and vehicle stopped
      • No significant fluctuation: Engine running and vehicle driven at a constant speed
      		 -
      Engine/Power Management ECU Pseudo Engine Revolution Engine speed Min.: 0 rpm
      Max.: 12800 rpm      		 No significant fluctuation Engine 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
      Engine running and steering wheel being turned*1
      Hybrid control system started and steering wheel being turned*2      		 -
      Command Value Current Requested current to motor Min.: -327.68 A
      Max.: 327.67 A      		 Value changes in proportion to steering effort
      Engine running and steering wheel being turned*1
      Hybrid control system started and steering wheel being turned*2      		 -
      Steering Angle Velocity Steering angle speed Min.: -32768 deg/s
      Max.: 32767 deg/s      		 Value changes in proportion to steering speed
      Engine running and steering wheel being turned*1
      Hybrid control system started and steering wheel being turned*2      		 -
      Thermistor Temperature ECU substrate temperature Min.: -50.0°C (-58.0°F)
      Max.: 150.0°C (302.0°F)      		 -50°C to 150°C (-58°F to 302°F) -
      IG Power Supply IG power source voltage Min.: 0.0000 V
      Max.: 20.1531 V      		 8 to 16 V (w/o Stop and Start System)
      10.5 to 16 V (w/ Stop and Start System)      		 Ignition switch ON
      Steering Angle Sens Sig Steering sensor signal state OK or NG(1) or NG(2) or NG(3) OK: Steering sensor signal received
      NG(1): The learning has not completed
      NG(2): Steering 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
      Engine running and steering wheel being turned*1
      Hybrid control system started and steering wheel being turned*2      		 -
      Motor Rotation Angle Motor rotation angle Min.: 0.000 deg
      Max.: 360.000 deg      		 During steering operation, motor rotation angle value changes from 0 to 360° Engine running and steering wheel being turned*1
      Hybrid control system started and steering wheel being turned*2
      Command Val Current 2 Requested current to motor Min.: -327.68 A
      Max.: 327.67 A      		 Value changes in proportion to steering effort Engine running and steering wheel being turned*1
      Hybrid control system started and steering wheel being turned*2
      Motor Voltage Motor power supply voltage Min.: 0.000 V
      Max.: 98.000 V      		 9 to 16 V Always
      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 Engine running and steering wheel not being turned (without load)*1
      Hybrid control system started and steering wheel not being turned (without load)*2
      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 Engine running and steering wheel not being turned (without load)*1
      Hybrid control system started and steering wheel not being turned (without load)*2
      IG ON/OFF Times Number of times of ignition switch turned on/off since latest DTC detection Min.: 0 times
      Max.: 65535 times      		 - -
      Motor Overheat Record Continuous overheat prevention control record Unrec or Rec Unrec Unrec: Unrecorded
      Rec: Recorded
      The amount of power assist may be decreased to prevent the motor and ECUs from overheating if the steering wheel is continuously turned when the vehicle is either stopped or driven at a low speed, or if the steering wheel is kept in either full lock position for a long time.
      Motor Lo Power Record PIG power source voltage drop record Unrec or Rec Unrec Unrec: Unrecorded
      Rec: Recorded
      If the PIG power source voltage decreases temporarily, the amount of power assist will be reduced.
      Eng Rev/System Start Inter Record Record of engine 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 times -
      Battery Control Count (Body ECU) Number of auxiliary battery load control operations Min.: 0 times
      Max.: 65535 times      		 - -
      PS Assist Signal Status of the record of power steering assist signal OFF or ON for Gasoline Model:
      OFF: Ignition switch ON
      ON: Engine running
      for HV Model:
      OFF: Ignition switch ON
      ON: Ignition switch ON (READY)      		 -
      Ready Status Ready status OFF or Ready OFF: Except ignition switch ON (READY)
      Ready: Ignition switch ON (READY)      		 *2
      Motor Actual Current 2 Amount of current to motor Min.: -327.68 A
      Max.: 327.67 A      		 Value changes in proportion to steering effort Engine running and steering wheel being turned*1
      Hybrid control system started and steering wheel being turned*2
      Stop&Start Ctrl Mode Status of the record of stop and start control mode IG, Run, Stopreq, Stop, Restart IG: Ignition switch ON (Before engine started)
      Run: Engine running
      Stopreq: Engine stop requested
      Stop: Engine stopped
      Restart: Engine restarting      		 w/ Stop and Start System
      Motor Overheat Limit Cnt (Normal) Number of times that assist limit was performed according to the estimated temperature of the motor coil and heat generating components of the power steering ECU assembly Min.: 0 times
      Max.: 255 times      		 - -
      Assist Limit Cnt (Power Voltage Low) Number of times that assist limit was performed due to auxiliary 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 auxiliary 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 when the motor was overloaded 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 limit was performed due to auxiliary battery voltage having dropped to 9 V or below Min.: 0 times
      Max.: 255 times      		 - -
      Battery Voltage Keep Limit Cnt Number of times that assist limit was performed due to auxiliary battery voltage having dropped to 9.7 V or below 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, Vhcl Spd Sig Malf, Batt Vol Keep - -
      Record 1 Key Cycle Number of times that the ignition switch was turned to 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 since the ignition switch was turned to ON before Assist Limit Record 1 was stored Min.: 0.0 s
      Max.: 53687091.1 s      		 - -
      Record 1 Power Source Power source operating status when Assist Limit Record 1 was stored No Data, Running, Stop - -
      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, Vhcl Spd Sig Malf, Batt Vol Keep - -
      Record 2 Key Cycle Number of times that the ignition switch was turned to 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 since the ignition switch was turned to ON before Assist Limit Record 2 was stored Min.: 0.0 s
      Max.: 53687091.1 s      		 - -
      Record 2 Power Source Power source operating status when Assist Limit Record 2 was stored No Data, Running, Stop - -
      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, Vhcl Spd Sig Malf, Batt Vol Keep - -
      Record 3 Key Cycle Number of times that the ignition switch was turned to 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 since the ignition switch was turned to ON before Assist Limit Record 3 was stored Min.: 0.0 s
      Max.: 53687091.1 s      		 - -
      Record 3 Power Source Power source operating status when Assist Limit Record 3 was stored No Data, Running, Stop - -
      Current Key Cycle Number of times that ignition switch was turned to ON Min.: 0 times
      Max.: 65535 times      		 - -
      Current Key Cycle Elapsed Time Time elapsed since ignition switch was turned to ON Min.: 0.0 s
      Max.: 53687091.1 s      		 - -
      Steering Angle Steering angle Min.: -3072.0 deg
      Max.: 3070.5 deg      		 - -
      Torque Sensor 1 Output Torque sensor 1 output value Min.: 0.0000 V
      Max.: 4.9725 V      		 - -
      Torque Sensor 2 Output Torque sensor 2 output value Min.: 0.0000 V
      Max.: 4.9725 V      		 - -
      Torque Sensor 1 Power Supply Torque sensor 1 power supply voltage Min.: 0.0000 V
      Max.: 4.9725 V      		 - -
      Torque Sensor 2 Power Supply Torque sensor 2 power supply voltage Min.: 0.0000 V
      Max.: 4.9725 V      		 - -
      Rotation Angle Sensor Output 1 Rotation angle sensor Vx1 output voltage Min.: 0.0000 V
      Max.: 4.9725 V      		 - -
      Rotation Angle Sensor Output 2 Rotation angle sensor Vx2 output voltage Min.: 0.0000 V
      Max.: 4.9725 V      		 - -
      Rotation Angle Sensor Output 3 Rotation angle sensor Vy1 output voltage Min.: 0.0000 V
      Max.: 4.9725 V      		 - -
      Rotation Angle Sensor Output 4 Rotation angle sensor Vy2 output voltage Min.: 0.0000 V
      Max.: 4.9725 V      		 - -
      Motor 1 Terminal Current (U) Motor 1 terminal current (U phase) Min.: -327.68 A
      Max.: 327.67 A      		 Value changes in proportion to steering effort Engine running and steering wheel being turned*1
      Hybrid control system started and steering wheel being turned*2
      Motor 1 Terminal Current (V) Motor 1 terminal current (V phase) Min.: -327.68 A
      Max.: 327.67 A      		 Value changes in proportion to steering effort Engine running and steering wheel being turned*1
      Hybrid control system started and steering wheel being turned*2
      Motor 1 Terminal Current (W) Motor 1 terminal current (W phase) Min.: -327.68 A
      Max.: 327.67 A      		 Value changes in proportion to steering effort Engine running and steering wheel being turned*1
      Hybrid control system started and steering wheel being turned*2
      Motor 2 Terminal Current (U) Motor 2 terminal current (U phase) Min.: -327.68 A
      Max.: 327.67 A      		 Value changes in proportion to steering effort Engine running and steering wheel being turned*1
      Hybrid control system started and steering wheel being turned*2
      Motor 2 Terminal Current (V) Motor 2 terminal current (V phase) Min.: -327.68 A
      Max.: 327.67 A      		 Value changes in proportion to steering effort Engine running and steering wheel being turned*1
      Hybrid control system started and steering wheel being turned*2
      Motor 2 Terminal Current (W) Motor 2 terminal current (W phase) Min.: -327.68 A
      Max.: 327.67 A      		 Value changes in proportion to steering effort Engine running and steering wheel being turned*1
      Hybrid control system started and steering wheel being turned*2
      Motor 1 U Phase Duty Motor 1 U phase duty Min.: 0.00%
      Max.: 100.00%      		 - -
      Motor 1 V Phase Duty Motor 1 V phase duty Min.: 0.00%
      Max.: 100.00%      		 - -
      Motor 1 W Phase Duty Motor 1 W phase duty Min.: 0.00%
      Max.: 100.00%      		 - -
      Motor 2 U Phase Duty Motor 2 U phase duty Min.: 0.00%
      Max.: 100.00%      		 - -
      Motor 2 V Phase Duty Motor 2 V phase duty Min.: 0.00%
      Max.: 100.00%      		 - -
      Motor 2 W Phase Duty Motor 2 W phase duty Min.: 0.00%
      Max.: 100.00%      		 - -
      Motor 1 Terminal Volt (U) Motor 1 terminal voltage (U phase) Min.: 0.000 V
      Max.: 98.000 V      		 Value changes within 4 to 35 V range Engine running and steering wheel being turned*1
      Hybrid control system started and steering wheel being turned*2
      Motor 1 Terminal Volt (V) Motor 1 terminal voltage (V phase) Min.: 0.000 V
      Max.: 98.000 V      		 Value changes within 4 to 35 V range Engine running and steering wheel being turned*1
      Hybrid control system started and steering wheel being turned*2
      Motor 1 Terminal Volt (W) Motor 1 terminal voltage (W phase) Min.: 0.000 V
      Max.: 98.000 V      		 Value changes within 4 to 35 V range Engine running and steering wheel being turned*1
      Hybrid control system started and steering wheel being turned*2
      Motor 2 Terminal Volt (U) Motor 2 terminal voltage (U phase) Min.: 0.000 V
      Max.: 98.000 V      		 Value changes within 4 to 35 V range Engine running and steering wheel being turned*1
      Hybrid control system started and steering wheel being turned*2
      Motor 2 Terminal Volt (V) Motor 2 terminal voltage (V phase) Min.: 0.000 V
      Max.: 98.000 V      		 Value changes within 4 to 35 V range Engine running and steering wheel being turned*1
      Hybrid control system started and steering wheel being turned*2
      Motor 2 Terminal Volt (W) Motor 2 terminal voltage (W phase) Min.: 0.000 V
      Max.: 98.000 V      		 Value changes within 4 to 35 V range Engine running and steering wheel being turned*1
      Hybrid control system started and steering wheel being turned*2
      Motor 1 PIG Power Supply Power supply voltage to active motor 1 Min.: 0.0000 V
      Max.: 20.1531 V      		 9 to 16 V Engine running and steering wheel being turned*1
      Hybrid control system started and steering wheel being turned*2
      Motor 2 PIG Power Supply Power supply voltage to active motor 2 Min.: 0.0000 V
      Max.: 20.1531 V      		 9 to 16 V Engine running and steering wheel being turned*1
      Hybrid control system started and steering wheel being turned*2
      The Number of DTCs Number of detected DTCs when freeze frame data was stored Min.: 0
      Max.: 255      		 0 to 255 -

      *1: for Gasoline model

      *2: for HV model

      HINT: 

      • With the vehicle stopped or driving very slowly, if the steering wheel is turned repeatedly or turned to a lock position and the vehicle is driven for an extended period of time, the amount of power assist is decreased to prevent overheating of the motor and ECU. If this occurs, engine running and do not turn the steering wheel for approximately 10 minutes to improve power assist.
      • If the auxiliary battery is not sufficiently charged or the voltage decreases temporarily, the amount of power assist is reduced and the EPS warning light comes on. In such cases, the amount of power assist returns to normal when the auxiliary battery voltage recovers.
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