Lexus IS250 · Service Manual STEERING

FREEZE FRAME DATA

Troubleshooting


FREEZE FRAME DATA

NOTICE:
  1. It is difficult to show the specified values (judgement values) clearly because freeze frame data values change significantly due to differences in measurement conditions, surroundings, or vehicle conditions. For this reason, there may be a problem even when the values are within specifications.
  2. Turn the engine switch on (IG) and park the vehicle on level ground. Check the freeze frame data by using the intelligent tester.

  1. Connect the intelligent tester to the DLC3.

  2. Turn the engine switch on (IG) and check the freeze frame data by following the prompts on the intelligent tester's display screen.

    Item
    		 Item Description/Range (Display)
    		 Inspection Condition
    		 Reference Value
    Trq1
    		 Torque sensor 1 rotation angle/
    Min.: 0 deg, Max.: 360 deg
    		 Steering wheel is turned
    		 Value changes from 0 to 360° every 22.5° of steering angle
    Trq2
    		 Torque sensor 2 rotation angle/
    Min.: 0 deg, Max.: 360 deg
    		 Steering wheel is turned
    		 Value changes from 0 to 360° every 22.5° of steering angle
    Engine Speed
    		 Vehicle speed from meter/
    Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph)
    1. Vehicle is stopped
    2. Vehicle is driven at a constant speed
    1. 0 km/h (0 mph)
    2. No significant fluctuation
    Engine Rev
    		 Engine revolution/
    Min.: 0 rpm, Max.: 8,192 rpm
    		 Engine is running at a constant speed
    		 No significant fluctuation
    Motor Actual
    		 Amount of current to motor/
    Min.: -128 A, Max.: 127 A
    		 Power steering is in operation
    		 Value changes in proportion to steering effort
    Command Value
    		 Demanded amount of current to motor/
    Min.: -128 A, Max.: 127 A
    		 Power steering is in operation
    		 Value changes in proportion to steering effort
    Str Angl Vel
    		 Steering angle speed/
    Min.: -4,096 deg/sec, Max.: 4,064 deg/sec
    		 Steering wheel is turned
    		 Value changes in proportion to steering speed
    Thermistor Temp
    		 ECU substrate temperature/
    Min.: -50°C, Max.: 205°C
    		 Engine switch on (IG)
    		 -
    PIG Supply
    		 Power source voltage to activate motor/
    Min.: 0 V, Max.: 25.5 V
    		 Power steering is in operation
    		 10 to 14 V
    IG Supply
    		 ECU power source voltage/
    Min.: 0 V, Max.: 25.5 V
    		 Engine switch on (IG)
    		 10 to 14 V
    Trq1 Zero Val
    		 Zero point value of torque sensor 1/
    Min.: 0 deg, Max.: 360 deg
    		 Steering wheel is not turned
    (without load)
    		 Values differ depending on vehicle
    Trq2 Zero Val
    		 Zero point value of torque sensor 2/
    Min.: 0 deg, Max.: 360 deg
    		 Steering wheel is not turned
    (without load)
    		 Values differ depending on vehicle
    Steering Torque
    		 Steering torque/
    Min.: -7.0 N*m, Max.: 7.0 N*m
    		 Steering wheel is turned
    		 Value changes in proportion to steering effort
    Motor Rotate
    		 Motor rotation angle/
    Min.: 0 deg, Max.: 360 deg
    		 Steering wheel is turned
    		 Value changes from 0 to 360° every 5° of steering angle
    Command Value 2
    		 Demanded amount of current to motor 2/
    Min.: -128 A, Max.: 127 A
    		 -
    		 -
    PIG2 Voltage
    		 Motor drive voltage after pressurization
    		 Power steering is in operation
    		 27 to 34 V
    Motor Voltage
    		 Motor power source voltage/
    Min.: 0 V, Max.: 64 V
    		 Power steering is in operation
    		 27 to 34 V
    Mtr Terminal (U)
    		 Motor terminal voltage (U phase)/
    Min.: 0 V, Max.: 64 V
    		 Power steering is in operation
    		 0 to 34 V
    Mtr Terminal (V)
    		 Motor terminal voltage (V phase)/
    Min.: 0 V, Max.: 64 V
    		 Power steering is in operation
    		 0 to 34 V
    Mtr Terminal (W)
    		 Motor terminal voltage (W phase)/
    Min.: 0 V, Max.: 64 V
    		 Power steering is in operation
    		 0 to 34 V
    Str Sens Sig
    		 Steering angle sensor signal status/
    OK or NG
    		 -
    		 -
    Mtr Overheat
    		 Continuous overheat prevention control record/
    REC or UNREC
    		 -
    		 -
    Mtr Low Power
    		 PIG power source voltage drop record/
    REC or UNREC
    		 -
    		 -
    Eng Rev Inter
    		 Record of engine revolution signal interruption/
    REC or UNREC
    		 -
    		 -
    Str Angl Inter
    		 Record of steering angle sensor signal interruption/
    REC or UNREC
    		 -
    		 -
    Spd Sig Invalid
    		 Record of vehicle speed signal invalid/
    REC or UNREC
    		 -
    		 -
    IG ON/OFF Times
    		 Number of times IG switch is turned on after DTC detection/
    Min.: 0 time, Max.: 255 times
    		 -
    		 -
    DTC
    		 Number of detected DTCs when freeze frame data is stored/
    Min.: 0, Max.: 255
    		 -
    		 -
    Battery Voltage
    		 Battery voltage/
    Min.: 0V, Max.: 25.5
    		 -
    		 10 to 14 V
    PS Assist Sig
    		 Power steering assist signal/
    ON or OFF
    		 Engine switch on (IG)
    		 -

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