POWER SEAT CONTROL SYSTEM

FUNCTION OF MAIN COMPONENTS

1. The main components in the power seat control system have the following functions:

   Components	Outline
   Front Power Seat Switch Assembly	Operates the front power seat.
   Seat Memory Switch*1	Operates the seat position memory function.
   Position Control ECU Assembly*1	Operates the motors in accordance with the signals from the front power seat switch assembly. Registers and recalls seat positions in accordance with the operation of the seat memory switch. Operates the automatic away and automatic return*2 function.
   Main Body ECU (Multiplex Network Body ECU)*1	Various signals are transmitted and received via the Controller Area Network (CAN) by way of the main body ECU. Outputs shift position signals to the position control ECU via the main body ECU.
   Multiplex Tilt and Telescopic ECU*2	Detects the position information of the tilt and telescopic motors. Receives signals from the position control ECU assembly via the CAN, and memorizes and recalls the steering position.
   Multiplex Network Door ECU Assembly*1	Sends seat memory switch operating signals to the main body ECU.

   
   

   • *1: Models with memory function

   • *2: Models with driver side memory function

OPERATING CONDITION

1. Memory Function

   
   

   1. The operating conditions of the memory function are as follows:

      Function		Condition	Operation
      Memory		Either of the following conditions is met while the power switch is on (IG): Button 1, 2 or 3 is pushed while the "SET" button is pushed. Button 1, 2 or 3 is pushed within 3 seconds after the "SET" button is being pushed.	Stores the seat position. When the memory setting is completed, the buzzer will sound for 0.5 seconds.
      Recall	For Driver Seat	Power switch is off. Button 1, 2 or 3 (driver side seat memory switch) is pushed within 180 seconds after the driver door has been opened while the power switch is off. Button 1, 2 or 3 (driver side seat memory switch) is pushed.	Recalls the seat position that was memorized in the position control ECU assembly.
      		Power switch is on (IG). Shift position is in P. Button 1, 2 or 3 (driver side seat memory switch) is pushed.
      		Button 1, 2 or 3 (driver side seat memory switch) is pushed within 60 seconds after the power switch has been turned off and the driver door has been closed.
      	For Front Passenger Seat	Button 1, 2 or 3 (passenger side seat memory switch) is pushed within 180 seconds after: Power switch is off. Front passenger door is opened.
      		Power switch is on (IG). Shift position is in P. Button 1, 2 or 3 (passenger side seat memory switch) is pushed.
      Memory Call	For Driver Seat	A key ID is registered to button 1, 2 or 3. Power switch is off. The inside of the outside door handle is touched or the key unlock button is pushed to unlock, and then the driver door is opened.	The seat automatically moves rearward up to 50 mm (1.97 inch)*1 from the memorized seat position.
      		Seat position is in automatic away position. Power switch is on (ACC) or (IG).	The seat automatically returns to the memorized seat position.
      Automatic Away	For Driver Seat	Shift position is in P. Front driver side seat inner belt assembly is off. Power switch is turned off.	The seat automatically moves rearward up to 50 mm (1.97 inch)*1. The lumbar support, pelvic support and side support move to the rearmost position.
      	For Front Passenger Seat	Vehicle speed is less than 2.5 mph (4 km/h). Front passenger door is opened.	The lumbar support, pelvic support, side support and ottoman*2 move to the rearmost position.
      Automatic Return	For Driver Seat	Seat position is in automatic away position. Power switch is turned on (ACC) or on (IG).	The seat automatically returns to the previous seat position.
      		Seat position is in automatic away position. Front driver side seat inner belt assembly is on.

      Tech Tips

      *1: Seat slide distance can be changed using the body electronics system. For details, refer to the Repair Manual.

      *2: Models with ottoman function

FUNCTION

1. Front Power Seat

   
   

   1. The power seat control system can be used to control the driver seat and front passenger seat using the front power seat switch assembly.

   2. The memory function controls the driver seat by using the position control ECU assembly.

   3. Each function of the front power seat operates as follows:

      Function		Outline
      Manual Control		The user can perform slide, reclining, front vertical, seat lifter, lumbar support, pelvic support*1, cushion length*1, *2, 3, side support*1, shoulder support*2 and ottoman*2, 4 adjustments by operating the front power seat switch assembly.
      Memory*5	Memory	The memory function can memorize 3 different seat positions.
      	Recall	The recall function can recall 3 different memorized seat positions.
      	Memory Call*6	The memory call function, which utilizes the key IDs, is used to memorize and retrieve the optimal driving positions for a person possessing the key.
      	Automatic Away	The slide*6, lumbar support, pelvic support, side support and ottoman*4 move rearward, making it easier to exit the vehicle.
      	Automatic Return*6	The automatic return function automatically returns the seat to the previous position before starting the vehicle.

      
      

      • *1: Models with 16-way and 18-way power seat control system

      • *2: Models with 18-way power seat control system

      • *3: Models without ottoman function

      • *4: Models with ottoman function

      • *5: Models with memory function

      • *6: For driver seat

DIAGNOSIS

1. The position control ECU assembly has a diagnosis function. The position control ECU assembly stores a record of any power seat control system failures in its memory in the form of Diagnostic Trouble Codes (DTCs). DTCs can be read by connecting the Global TechStream (GTS) to the DLC3.