Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Data List / Active Test

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Steering / Power Assist Systems / Power Steering System(for Hv Model) / Data List / Active Test

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.

(a) Turn the power switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Chassis / EMPS / Data List.

(f) Read the Data List according to the display on the Techstream.

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): Power switch on (READY) and vehicle stopped
  • No significant fluctuation: Power switch on (READY) 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): Power switch on (READY) and vehicle stopped
  • No significant fluctuation: Power switch on (READY) 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): 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 increases when turning right and decreases when turning left

Power 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

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 increases when turning left and decreases when turning right

Power 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°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

Power switch on (IG)

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.: -327.68 Nm

Max.: 7.00 Nm

Value changes in proportion to steering effort

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

Power switch on (READY) and steering wheel being turned

Motor Rotation Angle

Motor rotation angle

Min.: 0.000 deg

Max.: 1441.770 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

Requested 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

Motor Voltage

Motor power supply voltage

Min.: 0.000 V

Max.: 98.000 V
  • Approximately 27 V: Power switch on (READY) and steering wheel being turned
  • Approximately 27 to 34 V: Power switch on (READY) and steering wheel not being turned

-

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

Power 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

Power switch on (READY) and steering wheel not being turned (without load)

IG ON/OFF Times

Number of times of power 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 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

OFF: Power switch on (IG)

ON: Power switch on (READY)

-

Ready Status

Ready status

OFF or Ready

OFF: Except power switch on (READY)

Ready: Power switch on (READY)

-

Motor Actual Current 2

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

Rotation Angle Sens Avg(SIN)

Rotation angle sensor average (SIN)

Min.: 0.0000 V

Max.: 4.9725 V

-

-

Rotation Angle Sens Avg(COS)

Rotation angle sensor average (COS)

Min.: 0.0000 V

Max.: 4.9725 V

-

-

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 power 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 power was set to a value suitable for high-speed driving when high speed is detected due to an abnormal vehicle speed signal

Min.: 0 times

Max.: 255 times

-

-

Battery Voltage Keep Limit Cnt

Number of times that the system was limited to conserve auxiliary battery voltage

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 power switch was turned on (IG) 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 power switch was turned on (IG) 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 power switch was turned on (IG) 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 power switch was turned on (IG) 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 power switch was turned on (IG) 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 power switch was turned on (IG) 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 power switch was turned on (IG)

Min.: 0 times

Max.: 65535 times

-

-

Current Key Cycle Elapsed Time

Time elapsed since power switch was turned on (IG)

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

Power switch on (READY) and steering wheel being turned

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

Power switch on (READY) and steering wheel being turned

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

Power switch on (READY) and steering wheel being turned

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

Power switch on (READY) and steering wheel being turned

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

Power switch on (READY) and steering wheel being turned

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

Power switch on (READY) and steering wheel being turned

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

Power switch on (READY) and steering wheel being turned

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

Power switch on (READY) and steering wheel being turned

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

Power switch on (READY) and steering wheel being turned

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

Power switch on (READY) and steering wheel being turned

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

Power switch on (READY) and steering wheel being turned

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

Power switch on (READY) and steering wheel being turned

Motor 1 PIG Power Supply

Power supply voltage to active motor 1

Min.: 0.0000 V

Max.: 20.1531 V

9 to 16 V

Power switch on (READY) and steering wheel being turned

Motor 2 PIG Power Supply

Power supply voltage to active motor 2

Min.: 0.0000 V

Max.: 20.1531 V

9 to 16 V

Power switch on (READY) and steering wheel being turned

The Number of DTCs

Number of detected DTCs when freeze frame data was stored

Min.: 0

Max.: 255

0 to 255

-

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, power switch on (READY) 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.
    Check Assist Limit Record

    Diagnosis System

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