Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VIZH
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 -           ]
Title: POWER ASSIST SYSTEMS: POWER STEERING SYSTEM: DATA LIST / ACTIVE TEST; 2016 - 2020 MY Sienna [12/2015 -        ]

DATA LIST / ACTIVE TEST

1. 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 ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Turn the Techstream on.

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

(f) 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:

Minimum: 0 km/h (mph), Maximum: 300 km/h (186.4 mph)

0 km/h (mph): Vehicle stopped

-

Vehicle driven at constant speed

No significant fluctuation

Engine Revolution

Engine revolution:

Minimum: 0 rpm, Maximum: 12800 rpm

Engine running at constant speed

No significant fluctuation

Motor Actual Current

Current to motor:

Minimum: -327.68 A, Maximum: 327.67 A

Value changes in proportion to steering effort

-

Command Value Current

Requested current to motor:

Minimum: -327.68 A, Maximum: 327.67 A

Value changes in proportion to steering effort

-

Steering Angle Velocity

Steering angle speed:

Minimum: -32768 deg/s, Maximum: 32767 deg/s

Value changes in proportion to steering effort

The engine is running and steering wheel is being turned

Thermistor Temperature

ECU substrate temperature:

Minimum: -50.0°C (-58.0°F), Maximum: 150.0°C (302.0°F)

-

-

PIG Power Supply

Power source voltage to activate motor:

Minimum: 0 V, Maximum: 20.1531 V

11 to 14 V: Always

-

IG Power Supply

ECU power source voltage:

Minimum: 0 V, Maximum: 20.1531 V

11 to 14 V: Ignition switch ON

-

Steering Wheel Torque

Steering Wheel Torque:

Minimum: -327.68 Nm, Maximum: 7.0 Nm

Value changes in proportion to steering effort

Ignition switch ON and power steering is operating

Motor Rotation Angle

Motor rotation angle:

Minimum: 0 deg, Maximum: 1441.77 deg

During steering operation, motor rotation angle value changes from 0 to 360°

The engine is running and steering wheel is being turned

Motor Voltage

Motor Power Supply Voltage:

Minimum: 0 V, Maximum: 98 V

11 to 14 V: Ignition switch ON

-

Motor Terminal Volt(U)

Motor terminal voltage (U phase):

Minimum: 0 V, Maximum: 98 V

Value changes within 4 to 35 V range

The engine is running and steering wheel is being turned.

Motor Terminal Volt(V)

Motor terminal voltage (V phase):

Minimum: 0 V, Maximum: 98 V

Value changes within 4 to 35 V range

The engine is running and steering wheel is being turned.

Motor Terminal Volt(W)

Motor terminal voltage (W phase):

Minimum: 0 V, Maximum: 98 V

Value changes within 4 to 35 V range

The engine is running and steering wheel is being turned.

Torque Sensor 1 Output

Torque sensor 1 output value:

Minimum: 0 V, Maximum: 4.9725 V

2.3 to 2.7 V

The engine is running and steering wheel is not turned (without load).

2.5 to 3.8 V

The engine is running and steering wheel is turned to right with vehicle stopped.

1.2 to 2.5 V

The engine is running and steering wheel is turned to left with vehicle stopped.

Torque Sensor 2 Output

Torque sensor 2 output value:

Minimum: 0 V, Maximum: 4.9725 V

2.3 to 2.7 V

The engine is running and steering wheel is not turned (without load).

1.2 to 2.5 V

The engine is running and steering wheel is turned to right with vehicle stopped.

2.5 to 3.8 V

The engine is running and steering wheel is turned to left with vehicle stopped.

IG ON/OFF Times

Number of times ignition switch turned to ON after DTC detection:

Minimum: 0 times, Maximum: 65535 times

-

-

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

Status of the Record of Engine Revolution Signal Interrupt:

Unrec or Rec

Unrec

-

Spd Sig Invalid Record

Record of vehicle speed signal invalid:

Unrec or Rec

Unrec

-

Battery Voltage Lo Record

Battery voltage drop record:

Minimum: 0 times, Maximum: 65535 times

0 times

-

Battery Voltage

Battery voltage:

Minimum: 0 V, Maximum: 25.5 V

11 to 14 V: Always

-

PS Assist Signal

Status of the Record of Power Steering Assist Signal:

ON or OFF

ON or OFF

-

The Number of DTCs

Number of detected DTCs when freeze frame data stored:

Minimum: 0, Maximum: 255

-

-