Lexus IS250 · Service Manual INTRODUCTION

INITIALIZATION

Troubleshooting

NOTICE:
When disconnecting the cable from negative (-) battery terminal, initialize the following system(s) after the terminal is reconnected.

  1. The initialization procedures are show below the table.
System Name
Parking Assist Monitor System
Power Window Control System

CORRECTION ON THE STEERING ANGLE NEUTRAL POINT

  1. If the following operations are performed, "SYSTEM INITIALIZING" is displayed on the multi-display.

    Part Name
    		 Operation
    		 Initialization Item
    Battery cable
    		 Disconnect
    		 Steering angle neutral point in memory
    Steering angle sensor connector
    		 Disconnect
    		 Steering angle neutral point in memory

  2. When "SYSTEM INITIALIZING" is displayed, correct the steering angle neutral point using either of the following methods.


METHOD 1

  1. Turn the steering wheel fully to the right, and left fully.


METHOD 2

  1. Drive the vehicle at more than 20 km/h (12 mph) for more than 5 minutes on a straight road and with as little traffic congestion as possible.

    HINT:
    While driving at a constant vehicle speed, the ECU recognizes the point where the steering angle changes the least and memorizes it as the steering angle neutral point.

  2. Stop the vehicle and check whether the neutral point is stored or not. If it is not stored, drive the vehicle some more (the neutral point is stored by driving the vehicle straight).


RESET (INITIALIZE) POWER WINDOW REGULATOR MOTOR

NOTICE:
  1. Resetting the power window motor (initializing the pulse sensor) is necessary when the battery terminal is disconnected; when the power window regulator master switch, power window regulator switch, wire harness, power window regulator and power window motor are replaced or removed/installed; or when the fuses are replaced. AUTO operation function, jam protection function and remote operation function via the power window regulator master switch do not operate without resetting.
  2. Be sure to reset the power window regulator motors using the power window switch on each door because the motors cannot be reset by remote operation using the power window master switch.
  3. In order to prevent a large amount of current from flowing in the wires, do not simultaneously reset 2 or more power window regulator motors.
  4. If the power window switch has been continuously operated for a long time, the power window regulator motor will stop so that no additional load will be applied to the motor. Continuing to operate the switch even after the motor has stopped will cause the switch to blink while restricting the AUTO UP/DOWN function and the remote UP/DOWN function. If this happens, reset the motor again after several minutes have passed.
  5. Whenever disconnecting the battery terminal, reset all the other systems besides the power window control system.

  1. Turn the engine switch on (IG).

  2. Halfway open the power window by pressing the power window switch.

  3. Fully pull up the switch until the power window is fully closed and continue to hold the switch for approx. 1 second after the power window is fully closed.

  4. Check that the AUTO UP/DOWN function operates normally.
    If the AUTO UP/DOWN function operates normally, reset operations have been completed at this time. If not normal, follow the steps below.

    1. Disconnect the negative battery terminal for 10 seconds.

    2. Connect the battery terminal.

    3. Turn the engine switch on (IG).

    4. Halfway open the power window by pressing the power window switch.

    5. If the AUTO UP/DOWN function operates normally, reset operations have been completed at this time.
      If not normal, follow the steps below.

    6. Turn the engine switch on (IG).

    7. Halfway open the power window by pressing the power window switch.

    8. Fully pull up the switch until the power window is fully closed and continue to hold the switch for approx. 12 seconds after the power window is fully closed.

    9. Check that the AUTO UP/DOWN function operates normally.

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