POWER SEAT CONTROL SYSTEM

FUNCTION OF MAIN COMPONENTS

1. The main components in the front power seat control system (with memory function) have the following functions:

   Component	Outline
   Front Power Seat Switch LH Position Control ECU	Operates the front power seat. Operates the motors in accordance with the signals from the front power seat switch. Registers and recalls seat positions in accordance with the operation of the seat memory switch. Operates the automatic away and automatic return functions.
   Seat Memory Switch	Operates the seat position memory function.
   Main Body ECU (Multiplex Network Body ECU)	Various signals are transmitted and received via the Controller Area Network (CAN).
   Multiplex Tilt and Telescopic ECU	Detects the position information of the tilt and telescopic motors. Receives signals from the position control ECU via the CAN and memorizes and recalls the steering position.
   Outer Mirror Control ECU (Driver Side/Front Passenger Side)	Receives signals from the position control ECU and memorizes and recalls the outer mirror surface position. The driver side outer mirror control ECU sends seat memory switch operating signals to the main body ECU.

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

   Component	Outline
   Rear Power Seat Switch (RH/LH)	Operates the rear power seat control system.
   No. 1 Fold Seat Switch Assembly
   No. 2 Fold Seat Switch Assembly
   Fold Seat Control ECU (RH/LH)	Detects the position information of the rear seat back motors. Controls the seatback reclining and fold down functions. The buzzer simultaneously sounds when the seatback operates.
   Main Body ECU (Multiplex Network Body ECU)	Outputs shift position signals to the fold seat control ECUs.
   Rear Door Courtesy Light Switch Assembly (RH/LH)	Outputs door open/close status signals to the fold seat control ECUs.
   Power Back Door ECU (Multiplex Network Door ECU)*1 or Back Door Lock Assembly*2	Outputs back door open/close status signals to the fold seat control ECUs.

   
   

   • *1: Models with power back door system

   • *2: Models without power back door system

OPERATING CONDITION

1. Memory Function

   
   

   1. The memory function operating conditions are as follows:

      Function	Condition	Operation
      Memory	Either of the following conditions is met while the engine switch is on (IG): Button 1, 2 or 3 (seat memory switch) is pushed while the "SET" button is pushed. Button 1, 2 or 3 (seat memory switch) is pushed within 3 seconds after the "SET" button is pushed.	Stores the seat position. When the memory setting is completed, the buzzer sounds for 0.5 seconds.
      Recall	Engine switch is off. Button 1, 2 or 3 (seat memory switch) is pushed within 180 seconds after the driver door has been opened while the engine switch is off. Button 1, 2 or 3 (seat memory switch) is pushed.	The seat position that was memorized in the position control ECU assembly is recalled. The buzzer sounds for 0.1 seconds once the stored seat position is reproduced.
      	Engine switch is on (IG). Shift position is in P. Button 1, 2 or 3 (seat memory switch) is pushed.
      	Button 1, 2 or 3 (seat memory switch) is pushed within 60 seconds after the engine switch has been turned off and the driver door has been closed.
      Memory Call	A key ID is registered to button 1, 2 or 3 (seat memory switch). Engine switch is off. The inside of the outside door handle is touched or the electrical key transmitter sub-assembly unlock button is pushed to unlock, and then the driver door is opened.	The seat position that was memorized in the position control ECU assembly is recalled. The buzzer sounds for 0.1 seconds once the stored seat position is reproduced.
      Automatic Away	Engine switch is off. Driver seat belt is not in use.	The seat automatically moves rearward up to 50 mm (1.97 in.). The lumbar support moves to the rearmost position.
      Automatic Return	Seat is in the automatic away position. Engine switch is turned on (ACC) or on (IG).	The seat automatically returns to the previous seat position. If the position control ECU determines that the driver seat will interfere with the retractable table while the automatic away function is operating, the automatic away function stops and the buzzer (built into the front power seat switch) sounds simultaneously.
      	Seat is in the automatic away position. Front driver side seat inner belt assembly is on.

2. Rear Power Seat System

   
   

   1. The fold down seat system operating conditions are as follows:

      Function	Condition	Operation
      One Touch Power Fold Down/Return Function	Vehicle speed is 5 km/h (3 mph) or less. Door is open on the side operated from. Rear power seat switch is operated.	Seatback folds down. The seatback returns to the position it was at when the seatback started to fold down. The buzzer sounds once when the seatback operation starts.
      	Vehicle speed is 5 km/h (3 mph) or less. Driver seat No. 1 fold seat switch assembly is operated.
      	Vehicle speed is 5 km/h (3 mph) or less. Back door is open. Deck side No. 2 fold seat switch assembly is operated.
      Emergency Stop Function	When the seatback is operating, the operated switch is operated again. When the seatback is operating, a switch which controls the side that is operating, other than the switch initially used to operate the seatback, is operated.	The operating seatback stops. When the seatback operation stops, the buzzer sounds for 10 seconds.

FUNCTION

1. Memory Function

   
   

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

      Function		Outline
      Manual Control		The user can perform seat slide, seat reclining, front vertical, seat lifter and lumbar support adjustments by operating the front 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 retrieve the optimal driving positions for a person possessing the electrical key transmitter sub-assembly.
      	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.

   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 ECUs memorize the outside rear view mirror positions and recalls them when all conditions are met.

2. Rear Power Seat System

   
   

   1. The fold down seat system has the following functions:

      System	Outline
      Manual Control	The user can perform seat reclining by operating the rear power seat switch.
      Automatic Fold Down/Return	The automatic fold down/return function can fold down and return the seatbacks with one touch via operation of the rear power seat switches or fold seat switch assemblies.

OPERATION

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 after connecting the Global TechStream (GTS) to the DLC3. For details, refer to the Repair Manual.