POWER SEAT CONTROL SYSTEM


  1. OPERATING CONDITION


    1. Memory Function (Driver Seat)


      1. The memory, recall and seat slide back conditions of the memory function are as follows:

        Function Condition Operation Action
        Memory Power switch is on (IG). Switch 1, 2 or 3 is pressed while the "SET" switch is pressed.

        • Memorizes the seat position when switch 1, 2 or 3 is pressed.

        • When the memory setting is completed, the buzzer will sound for 0.5 seconds.
        Switch 1, 2 or 3 is pressed within 3 seconds after the "SET" switch is pressed.
        Recall

        • Power switch is on (IG).

        • Shift lever is in P.

        • Memory switch is off.

        • Seat position is memorized.

        		 Switch 1, 2 or 3 is pressed. Recalls the seat position that was memorized in the position control ECU (front power seat switch).

        • Power switch is off.

        • Memory switch is off.

        • Seat position is memorized.

        • Driver door is opened.

        		 Switch 1, 2 or 3 is pressed within 180 seconds after the Power switch is turned off and the driver door is opened.

        • Power switch is off.

        • Memory switch is off.

        • Seat position is memorized.

        • Open driver door is closed.

        		 Switch 1, 2 or 3 is pressed within 60 seconds after the Power switch is turned off and the open driver door is closed.
        Automatic Away

        • Power switch is off.

        • Driver seat belt is not fastened.

        • Shift lever is in P.

        		 The seat automatically moves rearward up to 50 mm (1.97 in.). -
        Automatic Return

        • Seat is in the automatic away position.

        • Power switch is on (IG).

        • Fasten the driver seat belt.

        • Shift lever is in P.

        		 The seat automatically returns to the previous seat position. -

    2. Lever-operated "Front, Fold and Return" Function


      1. The lever operated "Front, Fold and Return" function will not operate in the following situations:


        • The front seat belt of the seat to be operated is fastened.

        • The Power switch is in on (IG) mode and the shift lever is in a position other than P (driver seat only).

      2. Operation of the lever-operated "Front, Fold and Return" function will stop in the following situations:


        • A power seat adjusting switch or a driving position memory switch is pressed.

        • The front seat belt of the seat which is operating is fastened.

        • The Power switch is in on (IG) mode and the shift lever is moved to a position other than P (driver seat only).

  2. FUNCTION


    1. Memory Function


      1. The power seat control system has the following functions:

        Function Outline
        Power Control The fore-and-aft slide, reclining, front vertical, lifter and lumbar support* can be adjusted using the power seat switch.
        Memory* Memory The memory function can memorize 3 different seat positions.
        Recall The recall function can recall 3 different memorized seat positions.
        Memory Call The memory call function, which utilizes the key IDs, is used to memorize and recall the optimal driving position for a person possessing the key.
        Automatic Away The seat slide moves rearward, making it easier to exit the vehicle.
        Automatic Return The automatic return function automatically returns the seat to the previous position before starting the vehicle.

        *: Only for driver seat

      2. The memory function works in combination with the following systems, ensuring usability and enabling easy entering or exiting of the vehicle.

        System Outline
        Power Tilt and Telescopic System The multiplex tilt and telescopic ECU memorizes the steering column position and recalls it when all conditions are met.
        Outside Rear View Mirror System The outer mirror control ECU assembly (LH/RH) memorizes the outside rear view mirror positions and recalls them when all conditions are met.

    2. Lever-operated "Front, Fold and Return" Function

      Function Operation Action
      Front and Fold Pull the reclining lever

      • The lock of the seatback is released.

      • The position control ECU receives a position signal from Hall IC of the sliding motor and lifter motor and memorizes the current seat position.

      • The lift motor operates to lower the seat to prevent interference with the roof lining.
      Fold the seatback completely forward The front seat will moves forward.
      Return Move the seatback backward until it locks The front seat returns to its original position automatically.

      Tech Tips

      Quickly creates entry and exit space when the seatback is manually reclined.

  3. OPERATION


    1. Seat Position Detection Method


      1. Power Seats with Memory Function


        1. The Hall IC installed on the power seat motor generates pulses corresponding to the speed of the motor. These pulses are then picked up by the position control ECU (front power seat switch) in order to detect the seat position.

          B004D1TC03
          *1 Power Seat Motor *2 Position Control ECU (Front Power Seat Switch)
          *3 Hall IC - -
          *a Pulsation generated by motor - -

  4. DIAGNOSIS


    1. The position control ECU (front power seat switch) has a diagnosis function. It stores a record of any power seat control system malfunctions in its memory in the form of Diagnostic Trouble Codes (DTCs).

    2. The position control ECU (front power seat switch) outputs malfunction data and 5-digit DTCs to the Global TechStream (GTS).

    3. The 5-digit DTCs can be read by connecting the Global TechStream (GTS) to the DLC3. For details, refer to the Repair Manual.