Home › Steering › Steering Column › VARIABLE GEAR RATIO STEERING: VARIABLE GEAR RATIO STEERING SYSTEM
Last Modified: 11-27-2007 1.6 U
Service Category: Steering Section: Steering Column
Model Year: 2008 Model: LX570 Doc ID: RM000000XO900GX
Title: VARIABLE GEAR RATIO STEERING: VARIABLE GEAR RATIO STEERING SYSTEM: DATA LIST / ACTIVE TEST (2008 LX570)

DATA LIST / ACTIVE TEST

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. READ DATA LIST

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Chassis / VGRS / Data List.

(e) According to the display on the Techstream, read the Data List.

VGRS

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Vehicle Speed (Vsc ECU)

Vehicle speed (Skid control ECU)/

Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph)

Actual vehicle speed (Speed indicated on speedometer)

-

Engine ReVolution (Rpm)

Engine speed (rpm)/

Less than 300 or 300 or more

Engine stopped: Less than 300 rpm

Engine running: 300 rpm or more

-

Mtr Power Source Cur.

Motor power source actual current/

Min.: 0 A, Max.: 127.5 A

Steering wheel not turned: Below 1 A

Steering wheel turned: 1 A or higher

-

PIG-Power Source Volt

PIG power source voltage/

Min.: 0 V, Max.: 25.5 V

Engine switch on (IG): 11 to 14 V

-

IG-Power Source Volt

IG power source voltage/

Min.: 0 V, Max.: 25.5 V

Engine switch on (IG): 11 to 14 V

-

Terminal Voltage U

Terminal voltage U/

Min.: 0 V, Max.: 25.5 V

VGRS system operating: 0 to 16 V

VGRS system not operating: 0 V

Turning the steering wheel changes the value (with the engine running and the VGRS system operating).

Terminal Voltage V

Terminal voltage V/

Min.: 0 V, Max.: 25.5 V

VGRS system operating: 0 to 16 V

VGRS system not operating: 0 V

Turning the steering wheel changes the value (with the engine running and the VGRS system operating).

Terminal Voltage W

Terminal voltage W/

Min.: 0 V, Max.: 25.5 V

VGRS system operating: 0 to 16 V

VGRS system not operating: 0 V

Turning the steering wheel changes the value (with the engine running and the VGRS system operating).

Lock Motor Output Volt

Lock motor output voltage/

Min.: 0 V, Max.: 25.5 V

Engine switch on (IG): 11 to 14 V

-

Thermistor Temperature

Thermistor temperature/

Min.: -50°C (-58°F), Max.: 205°C (419°F)

-

-

Command Value Duty

Command duty value for PVM control/

Min.: 0%, Max.: 100%

VGRS system operating: 0 to 100%

VGRS system not operating: 0%

-

Actuator Lock Duty Val

Command duty value for actuator lock control/

Min.: 0%, Max.: 100%

Engine switch on (IG): Below 10%

-

Straight Angle Valid Flag*1

Straight steering angle valid flag/

Valid or Invalid

Steering angle sensor zero point calibrated: Valid

Steering angle sensor zero point not calibrated: Invalid

-

Actuator Estimate Temp

Actuator estimated temperature/

Min.: -50°C (-58°F), Max.: 205°C (419°F)

-

-

Motor Overheat Record*2

Record of continuous overheat preventive control/

Rec or Unrec

Rec or Unrec

-

Motor Lo Power Record*2

Record of low motor power source voltage/

Rec or Unrec

Rec or Unrec

-

Motor Over load Record*2

Record of high motor power source voltage/

Rec or Unrec

Rec or Unrec

-

The Number of DTCs

The number of DTCs/

Max.: 0, Min.: 255

0 to 255

-

Test Mode Status

Test mode status/

Normal mode or Test mode

Normal mode status: Normal mode

Test mode status: Test mode

-

Steering Mode

Absorber control switch (AVS switch) position/

Sports or Normal

Absorber control switch position SPORT: Sports

Absorber control switch position NORM: Normal

-

Elec Angle Position

Deep-slot electric angle position recorded when actuator angle neutral point adjustment completed normally/

Min.: 0°, Max.: 360°

-

-

Resolver Offset(SIN)

Resolver offset (SIN)/

Min.: 0, V Max.: 25.5 V

Steering wheel turned: 0 to 16 V

Steering wheel not turned: 0 V

-

Resolver Offset(COS)

Resolver offset (COS)/

Min.: 0, V Max.: 25.5 V

Steering wheel turned: 0 to 16 V

Steering wheel not turned: 0 V

-

Motor Current U

Motor current U/

Min.: -63 A, Max.: 64.5 A

Steering wheel turned: 0 to 64.5 A

Steering wheel not turned: 0 A

-

Motor Current V

Motor current V/

Min.: -63 A, Max.: 64.5 A

Steering wheel turned: 0 to 64.5 A

Steering wheel not turned: 0 A

-

Motor Current W

Motor current W/

Min.: -63 A, Max.: 64.5 A

Steering wheel turned: 0 to 64.5 A

Steering wheel not turned: 0 A

-

Motor Voltage

Motor voltage/

Min.: 0 V, Max.: 51 V

VGRS system operating: 9 to 36 V

VGRS system not operating: 0 V

-

Steering Pos 1

Steering position/

Min.: -2047 deg., Max.: 2048.94 deg.

Steering wheel turned to right: Display value changes in negative direction

Steering wheel turned to left: Display value changes in positive direction

-

Steering Pos 2

Steering position/

Min.: -49150.5 deg., Max.: 49152 deg.

Steering wheel turned to right: Display value changes in negative direction

Steering wheel turned to left: Display value changes in positive direction

-

Actuator Position

Actuator position/

Min.: -2047 deg., Max.: 2048.94 deg.

Steering wheel turned: -2047 to 2048.94 deg.

-

Steering Angle Velocity

Steering angle velocity/

Min.: -2047 deg./s, Max.: 2048.94 deg./s

Steering wheel turned to right: Display value changes in negative direction

Steering wheel turned to left: Display value changes in positive direction

-

Actuator Target Angle 1

Actuator target angle 1/

Min.: -2047 deg., Max.: 2048.94 deg.

Steering wheel turned: -2047 to 2048.94 deg.

-

Actuator Target Angle 2

Actuator target angle 2/

Min.: -2047 deg., Max.: 2048.94 deg.

Steering wheel turned: -2047 to 2048.94 deg.

-

Actuator ReVolution Spd

Actuator revolution speed/

Min.: -2047 deg./s, Max.: 2048.94 deg./s

Steering wheel turned to right: Display value changes in negative direction

Steering wheel turned to left: Display value changes in positive direction

-

Actuator Deviation Ang

Actuator deviation angle/

Min.: -32 rad., Max.: 32 rad.

VGRS system operating: -32 to 32 rad.

-

Mode State

Mode state/

00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 0A, 0B, 0C, 0D, 0E, 0F or 10

-

-

NOTICE:

*1: This data must be "Valid" before proceeding with any steering adjustment. If "Invalid" is displayed, perform the steering angle sensor initialization procedure. If the steering actuator or steering control ECU has been replaced, perform VGRS system calibration (steering angle adjustment).

HINT:

*2: If "Rec" is displayed, enter the VGRS menu on the Techstream, select record clearance, and follow the prompts to set to "Unrec".

2. ACTIVE TEST

HINT:

Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests.

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus:

Body Electrical / Combination meter / Active Test.

(e) According to the display on the Techstream, perform the Active Test.

Combination Meter:

Tester Display

Test Part

Control Range

Diagnostic Note

Master Warning

Master warning light

OFF/ON

Confirm that the vehicle is stopped and the engine is running.