POWER SEAT CONTROL SYSTEM

FUNCTION OF MAIN COMPONENTS

Component	Outline
No.2 Position Control ECU Assembly	Inputs signals from the position sensors for the seat adjusters in the front passenger seat and detects the slide, reclining, lifter, headrest and support bladder positions for the front passenger seat. Receives signals from the full front/return switch and performs full front and return operations for the front passenger seat. Receives signals from the mode recall switch and performs full front and return operations for the front passenger seat.
Center Airbag Sensor	Receives signals from the front passenger seat belt buckle switch and sends buckle switch on/off signals to the main body ECU (multiplex network body ECU) via CAN communication.
Front Seat Inner Belt Assembly RH	Detects whether the front passenger seat belt buckle switch is on/off and sends signals to the airbag ECU assembly.
Front Door Courtesy Light Switch Assembly (RH)	Detects the opening and closing of the front passenger door and sends signals to the main body ECU (multiplex network body ECU).
Multi-display	Outputs full front/return switch operation to the front position control ECU assembly RH.
Front Passenger Seat Control Switch	Enable passenger seat operation with front power seat switch LH.
Front Power Seat Switch RH	Operates the reclining function or headrest up/down adjuster of the front passenger seat when the switch is operated. Operates the seat slide function, headrest front up/down function or vertical lifter function of the front passenger seat when the switch is operated.
Certification ECU (Smart Key ECU Assembly)	Sends smart memory call recall command signals to the position control ECU assembly via CAN communication.
Front Multiplex Network Door ECU LH	Inputs signals from the front passenger door courtesy switch, and sends opening and closing signals for the front passenger door to the front position control ECU assembly RH via CAN communication. Sends on/off signals for the front seat inner belt assembly RH to the front position control ECU assembly RH via CAN communication. Sends IG ON signals to the front position control ECU assembly RH via CAN communication.
Position Control ECU Assembly LH	Inputs signals from the position sensors for the seat adjusters in the rear left seat and detects the ottoman, slide, reclining, seatback center folding and headrest positions for the rear left seat. Receives signals from the mode recall switch and performs relaxation mode/return operations for the rear left seat.
Rear Multi Operation Panel	Outputs mode recall switch signals to the front position control ECU assembly RH and rear position control ECU assembly RH.
Occupant Detection Sensor	Detects whether a passenger is in the front passenger seat.

OPERATING CONDITION

Memory Function

The operating conditions of the memory function are as follows:

Function		Condition	Operation
Memory	For Front Seat	Either of the following conditions is met while the power switch is on (IG): Button 1, 2 or 3 (front seat memory switch) is pushed while the "SET" button is pushed. Button 1, 2 or 3 (front 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 sound for 0.5 seconds.
Memory	For Rear Seat	Either of the following conditions is met while the power switch is on (IG): Switch "Set Memory" (rear multi operation panel) is pushed.	Stores the seat position. When the memory setting is completed, the buzzer 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.	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.
		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 engine switch has been turned off and the driver door has been closed.
	For Front Passenger Seat	Button 1, 2 or 3 (front passenger side seat memory switch) is pushed within 180 seconds after: Power switch is off. Front passenger door is opened.
	For Front Passenger Seat	Power switch is on (IG). Shift position is in P. Button 1, 2 or 3 (front passenger side seat memory switch) is pushed.
	For Rear Seat	Power switch is on (IG). Switch "1" or "2" (rear multi operation panel) is pushed.	The seat position that was memorized in the position control ECU assembly is recalled. However, if the ottoman position is lower than the stored position, the ottoman position is not changed. If the ottoman position is higher than the stored position, the ottoman lowers to the stored position.*1
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 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	For Driver Seat	Shift lever is in P. Vehicle speed is less than 10 km/h (6.2 mph). Power switch is off. Driver seat belt is not in use.	The seat automatically moves rearward up to 50 mm (1.97 inch).2 The lumbar support moves to the rearmost position.2
	For Front Passenger Seat	Power switch is off. Vehicle speed is less than 4 km/h (2.5 mph). Front passenger door is opened.	The lumbar support moves to the rearmost position.*2
	For Rear Seat	Power switch is on (IG). Vehicle speed is less than 3 km/h (1.8 mph). Front passenger door is opened.	The seat automatically moves to the default position. This function can be used within 45 seconds of turning the engine switch on (IG) to off.
Automatic Return	For Front Passenger Seat	Seat is in automatic away position. Power switch is turned on (ACC) or on (IG). Front driver side seat inner belt assembly is on. Occupant Detection Sensor is on.	The seat automatically returns to the previous seat position. When getting on from the front passenger seat full front position, the seat is automatically operated to the rear so as to get on quickly.
Remote Control	For Front Passenger Seat	Seat is in automatic away position. Power switch is turned on (ACC) or on (IG). Front driver side seat inner belt assembly is on. Occupant Detection Sensor is on.	Light the front passenger seat remote switch indicator so that you can see that the front passenger seat remote permit state is in effect.

Tech Tips

*1: Models with ottoman function

*2: This setting can be customized using the navigation system. For details, refer to the Repair Manual.

There are two full front and return operations, one for the front passenger seat independent operation and one for the rear seat ottoman-linked operation. Those operations are used according to the switch positions and operation descriptions in the table below.

Operation Name	Switch Position	Operation Description		Start of Operation Buzzer Sounding
Operation Name	Switch Position	Auto/Pressed Continuously	Operation Range	Start of Operation Buzzer Sounding
Front passenger seat auto-switch linked (extra front)	Multi-display	Auto (forward)	Front passenger seat only	No.2 Position Control ECU Assembly
Front passenger seat auto-switch linked (extra return 1)		Auto (backwards)	Rear seat-linked (rear seat operates→front passenger seat operates)	Position Control ECU Assembly LH
Front passenger seat auto-switch linked (extra return 2)		Auto (backwards)	Rear seat-linked (rear seat operates→front passenger seat operates)	Position Control ECU Assembly LH
Front passenger seat extra front (one-push)	Rear Multi Operation Panel	Auto (forward)	Front passenger seat only	No.2 Position Control ECU Assembly
Front passenger seat extra return 1 (one-push)		Auto (backwards)	Rear seat-linked (rear seat operates→front passenger seat operates)	Position Control ECU Assembly LH
Front passenger seat extra return 2 (one-push)		Auto (backwards)	Rear seat-linked (rear seat operates→front passenger seat operates)	Position Control ECU Assembly LH
Front passenger seat extra front (pressed continuously)		Pressed continuously (forward)	Front passenger seat only	-
Front passenger seat extra return (pressed continuously)		Pressed continuously (backwards)	Front passenger seat only	-
Mode recall (relax)		Auto (forward)	Rear seat-linked (front passenger seat operates→rear seat operates)	No.2 Position Control ECU Assembly
Mode recall (entertain 1)		Auto (forward)	Rear seat-linked (front passenger seat operates→rear seat operates)	Position Control ECU Assembly LH
Mode recall (entertain 2)		Auto (backwards)	Rear seat-linked (rear seat operates→front passenger seat operates)	Position Control ECU Assembly LH

FUNCTION

Front Power Seat Control System

The front power seat control system can be used to control the driver seat and front passenger seat using the front power seat switch assembly.
The memory function controls by the position control ECU assembly.

Each function of the front power seat control system operates as follows:

Function		Outline
Manual Control		The user can perform seat slide, seat reclining, front vertical, seat lifter, lumbar support, cushion length*1 and headrest height 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*1 and lumbar support move to the 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.
Remote Control		Front passenger seat can be manually operated from the driver seat for hospitaality to front passenger seat occupant.
Front Passenger Seat Full Front Control*2		The front passenger seat can be retracted to the foremost position and returned back to the original position by pressing the automatic switch located on the integration control panel assembly twice.

*1: For driver side
*2: For front passenger side

Rear Power Seat Control System

The rear power seat control system can be used to control the rear seat using the rear power seat switch and seat vibrator switch.
The memory function controls by the position control ECU assembly.

Each function of the rear power seat control system operates as follows:

Function		Outline
Manual Control		The user can perform seat slide, seat reclining, shoulder support, pelvic support, ottoman* and headrest height adjustments by operating the rear power seat switch and seat vibrator switch.
Memory	Memory	The memory function can memorize 1 different seat position.
	Recall	The recall function can recall 1 different memorized seat position.
	Automatic Away	In order to improve ease of getting in and out of the vehicle, the personalized positions of the rear seat functions can be returned to their default positions when a rear door is opened. The synchronization with the rear door operation can be canceled by pressing the "C" switch of the memory system.

*: Models with ottoman function

DIAGNOSIS

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 Techstream to the DLC3.