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Home >> Lexus >> 2011 >> LX 570 >> Repair and Diagnosis (Single Page) >> Steering >> Steering Gear >> Variable Gear Ratio Steering System (Diagnostics - Introduction) >> Variable Gear Ratio Steering System >> Freeze Frame Data >> Freeze Frame Data
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Freeze Frame Data

HINT: 

The VGRS system stores data when a trouble code is stored which can be viewed using the Techstream.

  1. FREEZE FRAME DATA OF STEERING CONTROL ECU 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG) and check the freeze frame data by following the prompts on the Techstream screen.
      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)/
      Und 300 or Ovr 300      		 Engine stopped: Und 300 rpm
      Engine running: Ovr 300 rpm      		 -
      Mtr Power Source Cur. Motor power source actual current/
      Min.: 0.0 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.: 0.0 V, Max.: 25.5 V      		 Engine switch on (IG): 11 to 14 V -
      IG-Power Source Volt IG power source voltage/
      Min.: 0.0 V, Max.: 25.5 V      		 Engine switch on (IG): 11 to 14 V -
      Lock Motor Output Volt Lock motor output voltage/
      Min.: 0.0 V, Max.: 25.5 V      		 Engine switch on (IG): 11 to 14 V -
      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% -
      Resolver Offset(SIN) Resolver offset (SIN)/
      Min.: 0.0 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.: 0.0 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.: -63.0 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.: -63.0 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.: -63.0 A, Max.: 64.5 A      		 Steering wheel turned: 0 to 64.5 A
      Steering wheel not turned: 0 A      		 -
      Motor Voltage Motor voltage/
      Min.: 0.0 V, Max.: 51.0 V      		 VGRS system operating: 9 to 36 V
      VGRS system not operating: 0 V      		 -
      Steering Pos 1 Steering position/
      Min.: -2047.0000 deg, Max.: 2048.9375 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.: -2047.0000 deg, Max.: 2048.9375 deg      		 Steering wheel turned: -2047 to 2048.9375 deg -
      Steering Angle Velocity Steering angle velocity/
      Min.: -2047.0000 deg/s, Max.: 2048.9375 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.: -2047.0000 deg, Max.: 2048.9375 deg      		 Steering wheel turned: -2047 to 2048.9375 deg -
      Actuator Target Angle 2 Actuator target angle 2/
      Min.: -2047.0000 deg, Max.: 2048.9375 deg      		 Steering wheel turned: -2047 to 2048.9375 deg -
      Actuator ReVolution Spd Actuator revolution speed/
      Min.: -2047.0000 deg/s, Max.: 2048.9375 deg/s      		 Steering wheel turned to right: Display value changes in negative direction
      Steering wheel turned to left: Display value changes in positive direction      		 -
      Mode State Mode state/
      00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 0A, 0B, 0C, 0D, 0E, 0F or 10      		 - -
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