Repair Instruction: Initialization

1. The position control ECU must be initialized under any of the following conditions. The initialization sets the absolute position of the power seat's sliding and reclining functions.

   HINT:

   Controlling the power seat's sliding and reclining functions together prevents the power seat from interfering with the rear seat during the power seat's sliding or reclining operation.

   • The battery is disconnected.
   • The D/C CUT fuse is replaced.
   • The position control ECU is replaced.
   • The power seat assy is removed from the vehicle.
2. Initialize the sliding function and reclining function of the position control ECU as follows.
   1. Reconnect the battery and use the sliding or reclining function with the front power seat switch to move the power seat to the foremost position (lock position). A buzzer should sound for 0.1 seconds.
   2. Use another function (sliding or reclining) which was not used in step ( 1) to move the front power seat to the foremost position (lock position). A buzzer should sound for 0.5 seconds.
   3. The position control ECU's initialization should be completed.
   NOTE:

   • If the initialization is not completed, the power seat's sliding and reclining functions cannot be controlled together.
   • If the initialization is not completed, a buzzer should sound continuously at 0.45 seconds intervals while the power seat is sliding or reclining backwards.
   • If the initialization is not completed, the position control ECU will not memorize any seat position.

HINT:

When the power seat's sliding and reclining functions linked control does not work properly, the seat's operational area is restricted. In this case, cancel the initialization of the position control ECU so that the sliding and reclining functions can be operated differently.

1. Operate a front power seat switch to slide it to the foremost position or fully tilt forward the seatback. Continue to hold the switch for at least 10 seconds. As a result, cancellation of the position control ECU's initialization is completed.

   HINT:

   • If that the seat's operational area is still restricted after the cancellation, the motor is malfunctioning.
   • In the case that the seat's operational area is not restricted any more after the cancellation, the seat adjuster assy (pulse sensor) is malfunctioning.
   NOTE: After the cancellation, slide the seat to the rear or recline the seatback. A buzzer sounds continuously in intervals of 0.45 seconds. If the initialization is performed again, a buzzer does not sound any more.

HINT:

These procedures described below are for vehicles without the LEXUS navigation system.

1. The location of magnetic north and true north differs depending on the location. Adjustment of the compass' magnetism is required to correct possible compass deviations from true north.
2. Compass function calibration is necessary when: 1) purchasing a vehicle, 2) disconnecting and reconnecting the cable from the negative (-) battery terminal, 3) replacing a battery, 4) driving the vehicle out of the numbered set zone (see the zone map on the next page), and 5) placing magnetic or metal objects on or near the accessory meter (multi display).

   HINT:

   If the accessory meter (multi display) is magnetized, the direction indication on the display blinks.