POSITION MEMORY SYSTEM

id091300999000

Outline

• A position memory system has been adopted in which the position of the driver’s seat can be programmed and positioned.

• The position memory system is controlled by the position memory control module.

Function

Seat position detection function

• The position memory control function can detect the seat position by the pulse signals it receives from the position sensors integrated with each motor.

• The position memory control module receives the pulse signals from the position sensors integrated with each motor when the power seat switch or the position memory switch is operated.

Seat position programming function

• The position memory control module can program seat positions corresponding to each individual remote transmitter or to seat positions corresponding to each switch of the position memory switch.

• The position memory control module can program seat positions using the remote transmitter or the position memory switch when all of the following conditions are met.

― Remote transmitter is used

• Ignition is switched OFF

• Power seat system is not operating

• Seat positioning function is not operating

― Position memory switch is used

• Power seat system is not operating

• Seat positioning function is not operating

Seat positioning function

• The position memory control module can automatically position the seats programmed to each individual remote transmitter or the seat positions programmed to each switch of the position memory switch.

• The position memory control module can automatically position programmed seat positions using the remote transmitter or the position memory switch when all of the following conditions are met.

― Remote transmitter is used

• Ignition is switched OFF

• Power seat system is not operating

• Seat positioning function is not operating

• Seat position is programmed using remote transmitter

• The driver's door is opened within approx. 40 seconds after the doors are unlocked using a request switch or the remote transmitter.

• Position memory switch is not pressed

― Position memory switch is used

Ignition is switched OFF or to ACC

• Power seat system is not operating

• Seat positioning function is not operating

• Seat position is programmed using position memory switch

Ignition is switched ON (engine on)

• Power seat system is not operating

• Seat positioning function is not operating

• Seat position is programmed using position memory switch

• Vehicle speed is 3 km/h or less

• ATX: Shift lever is in P position

• MTX: Parking brake is applied

Programmed seat position clearing function

• The position memory control module can clear all seat positions programmed using the position memory switch and remote transmitters when any of the following conditions is met.

― Remote transmitter is programmed or replaced, or cleared.

― Negative battery cable is disconnected.

― ROOM 15 A fuse is removed

― If any position sensor is malfunctioning, the position memory control module operates the fail-safe function.

• The position memory control module can clear seat positions programmed to individual remote transmitters when the following operations are performed using the remote transmitter.

Note

• Clearing of programmed seat positions can be performed while the power seat system and seat positioning functions are not operating.

1. Ignition is switched OFF (LOCK).

2. The position memory switch SET switch is pressed.

3. Within approx. 5 s from Step 2, the remote transmitter lock button is pressed.

Structure View

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Wiring Diagram

L.H.D.

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R.H.D.

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Operation

Seat position programming

• Using remote transmitter

1. Operate the power seat switch to move the seat to the position you want to program.

2. When the position memory switch SET switch is pressed, the SET switch on signal is input to the position memory control module.

3. When the position memory control module receives the SET switch on signal, it transitions the system to the seat position programming mode and sounds the buzzer.

4. When the remote transmitter unlock button is pressed within 5 s from Step 3, the start stop unit sends ID data and an unlock signal to the position memory control module.

5. When the position memory control module receives the ID data and unlock signal, it records the seat position, returns to the normal mode, and sounds the buzzer.

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• Position memory switch is pressed (Ex.: Memory switch 1 used).

1. Operate the power seat switch to move the seat to the position you want to program.

2. When the SET switch of the position memory switch is pressed, a SET switch on signal is input to the position memory control module.

3. When the position memory control module receives the SET switch on signal, it transitions the system to the seat position programming mode and sounds the buzzer.

4. When memory switch 1 is pressed within 5 s from Step 3, a memory switch 1 signal is input to the position memory control module.

5. When the position memory control module receives the memory switch 1 signal, it records the seat position, returns to the normal mode, and sounds the buzzer.

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Seat positioning

• Remote transmitter is used

1. If an unlock operation is performed using the remote transmitter or a front door request switch, the start stop unit sends ID data and an unlock signal to the position memory control module.

2. When the driver’s door is unlocked within 40 s from Step 1, the instrument cluster sends a driver’s door front door open signal to the position memory control module.

3. When the position memory control module receives the ID data and unlock signal, and the driver’s door front door unlock signal, it starts the seat positioning operation.

4. When the position memory control module starts the seat positioning operation, is calculates the difference between the current seat position and the programmed seat position and determines the direction of movement and distance for each motor.

5. The position memory control module supplies current to each motor based on the determined direction of movement and distance.

6. When the position memory control module detects that the seat has moved to the programmed position, it stops the seat positioning operation and sounds the buzzer.

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• Position memory switch is used (Ex.: Memory switch 1 is used)

1. When memory switch 1 is pressed, the memory switch 1 signal is input to the position memory control module.

2. When the position memory control module receives the memory switch 1 signal, it starts the seat positioning operation.

3. When the position memory control module starts the seat positioning operation, is calculates the difference between the current seat position and the programmed seat positions and determines the direction of movement and distance for each motor.

4. The position memory control module supplies current to each motor based on the determined direction of movement and distance.

5. When the position memory control module detects that the seat has moved to the programmed position, it stops the seat positioning operation and sounds the buzzer.

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Fail-safe

• When any of the following conditions is met, the position memory system operates the fail-safe function.

Detection condition

Fail-safe

Recovery condition

Continuous operation permit time for each power seat motor^*1 is exceeded

Malfunctioning motor operation is stopped and continuous operation is ended

Malfunction in each power seat motor (power short circuit, ground short circuit) detected

Determined fixed-at-on time for each switch^*2 is exceeded

The operation controlled by the switch-on is stopped

switch-off is detected

Detection condition	Fail-safe	Recovery condition
Continuous operation permit time for each power seat motor^*1 is exceeded	Malfunctioning motor operation is stopped and continuous operation is ended	Malfunction in each power seat motor (power short circuit, ground short circuit) detected
Determined fixed-at-on time for each switch^*2 is exceeded	The operation controlled by the switch-on is stopped	switch-off is detected

*1 :Refer to Continuous operation permit time for each power seat motor

*2 :Refer to Determined fixed-at-on time for each switch

Continuous operation permit time for each power seat motor

Name

Continuous operation permit time

Slide motor

Approx. 25 s

Tilt motor

Approx. 25 s

Lift motor

Approx. 40 s

Recliner motor

Approx. 45 s

Name	Continuous operation permit time
Slide motor	Approx. 25 s
Tilt motor	Approx. 25 s
Lift motor	Approx. 40 s
Recliner motor	Approx. 45 s

Determined fixed-at-on time for each switch

Name

Switch fixed-at-on time

Slide switch

Approx. 25 s

Tilt switch

Approx. 25 s

Lift switch

Approx. 40 s

Recliner switch

Approx. 45 s

SET switch

Approx. 10 s

Memory 1 switch

Approx. 5 s

Memory 2 switch

Approx. 5 s

Name	Switch fixed-at-on time
Slide switch	Approx. 25 s
Tilt switch	Approx. 25 s
Lift switch	Approx. 40 s
Recliner switch	Approx. 45 s
SET switch	Approx. 10 s
Memory 1 switch	Approx. 5 s
Memory 2 switch	Approx. 5 s

• When any of the following DTC is detects, the position memory system operates the fail-safe function.

DTC No.

Fail-safe function

B1B87:13

•  Memory clearing:

―  If there is a malfunction in the lift position sensor, clear all the memory positions.

•  Memory seat positioning using position memory switch and remote transmitter:

―  If there is a malfunction in the lift position sensor, inhibits all memory seat positioning.

―  If there is a malfunction in the lift motor, inhibits lift motor seat positioning.

•  Lift motor seat positioning using power seat switch:

―  If there is a malfunction in the lift motor, inhibits lift motor seat positioning.

•  Memory registration using position memory switch and remote transmitter:

―  If there is a malfunction in the lift position sensor, inhibits the memory registration.

―  If there is a malfunction in the lift motor and the malfunction is caused by short circuit, inhibits the memory registration.

B1B89:13

•  Memory clearing:

―  If there is a malfunction in the slide position sensor, clear all the memory positions.

•  Memory seat positioning using position memory switch and remote transmitter:

―  If there is a malfunction in the slide position sensor, inhibits all memory seat positioning.

―  If there is a malfunction in the slide motor, inhibits slide motor seat positioning.

•  Slide motor seat positioning using power seat switch:

―  If there is a malfunction in the slide motor, inhibits slide motor seat positioning.

•  Memory registration using position memory switch and remote transmitter:

―  If there is a malfunction in the slide position sensor, inhibits the memory registration.

―  If there is a malfunction in the slide motor and the malfunction is caused by short circuit, inhibits the memory registration.

B1B91:13

•  Memory clearing:

―  If there is a malfunction in the tilt position sensor, clear all the memory positions.

•  Memory seat positioning using position memory switch and remote transmitter:

―  If there is a malfunction in the tilt position sensor, inhibits all memory seat positioning.

―  If there is a malfunction in the tilt motor, inhibits tilt motor seat positioning.

•  Tilt motor seat positioning using power seat switch:

―  If there is a malfunction in the tilt motor, inhibits tilt motor seat positioning.

•  Memory registration using position memory switch and remote transmitter:

―  If there is a malfunction in the tilt position sensor, inhibits the memory registration.

―  If there is a malfunction in the tilt motor and the malfunction is caused by short circuit, inhibits the memory registration.

B1B93:13

•  Memory clearing:

―  If there is a malfunction in the recliner position sensor, clear all the memory positions.

•  Memory seat positioning using position memory switch and remote transmitter:

―  If there is a malfunction in the recliner position sensor, inhibits all memory seat positioning.

―  If there is a malfunction in the recliner motor, inhibits recliner motor seat positioning.

•  Recliner motor seat positioning using power seat switch:

―  If there is a malfunction in the recliner motor, inhibits recliner motor seat positioning.

•  Memory registration using position memory switch and remote transmitter:

―  If there is a malfunction in the recliner position sensor, inhibits the memory registration.

―  If there is a malfunction in the recliner motor and the malfunction is caused by short circuit, inhibits the memory registration.

U0100:00

•  Memory seat positioning using position memory switch and remote transmitter:

―  If the ignition is switched ON (engine off or on), inhibits all memory seat positioning.

U0101:00^*1

•  Memory seat positioning using position memory switch and remote transmitter:

―  If the ignition is switched ON (engine off or on), inhibits all memory seat positioning.

U0151:00

•  Memory seat positioning using position memory switch and remote transmitter:

―  If the ignition is switched ON (engine off or on), inhibits all memory seat positioning.

U0155:00

•  Memory seat positioning using position memory switch and remote transmitter:

―  Inhibits all memory seat positioning.

U0214:00

•  Memory seat positioning using remote transmitter:

―  Inhibits all memory seat positioning.

•  Memory registration using remote transmitter:

―  Inhibits the memory registration.

U3003:16

•  Not applicable

DTC No.	Fail-safe function
B1B87:13	• Memory clearing: ― If there is a malfunction in the lift position sensor, clear all the memory positions. • Memory seat positioning using position memory switch and remote transmitter: ― If there is a malfunction in the lift position sensor, inhibits all memory seat positioning. ― If there is a malfunction in the lift motor, inhibits lift motor seat positioning. • Lift motor seat positioning using power seat switch: ― If there is a malfunction in the lift motor, inhibits lift motor seat positioning. • Memory registration using position memory switch and remote transmitter: ― If there is a malfunction in the lift position sensor, inhibits the memory registration. ― If there is a malfunction in the lift motor and the malfunction is caused by short circuit, inhibits the memory registration.
B1B89:13	• Memory clearing: ― If there is a malfunction in the slide position sensor, clear all the memory positions. • Memory seat positioning using position memory switch and remote transmitter: ― If there is a malfunction in the slide position sensor, inhibits all memory seat positioning. ― If there is a malfunction in the slide motor, inhibits slide motor seat positioning. • Slide motor seat positioning using power seat switch: ― If there is a malfunction in the slide motor, inhibits slide motor seat positioning. • Memory registration using position memory switch and remote transmitter: ― If there is a malfunction in the slide position sensor, inhibits the memory registration. ― If there is a malfunction in the slide motor and the malfunction is caused by short circuit, inhibits the memory registration.
B1B91:13	• Memory clearing: ― If there is a malfunction in the tilt position sensor, clear all the memory positions. • Memory seat positioning using position memory switch and remote transmitter: ― If there is a malfunction in the tilt position sensor, inhibits all memory seat positioning. ― If there is a malfunction in the tilt motor, inhibits tilt motor seat positioning. • Tilt motor seat positioning using power seat switch: ― If there is a malfunction in the tilt motor, inhibits tilt motor seat positioning. • Memory registration using position memory switch and remote transmitter: ― If there is a malfunction in the tilt position sensor, inhibits the memory registration. ― If there is a malfunction in the tilt motor and the malfunction is caused by short circuit, inhibits the memory registration.
B1B93:13	• Memory clearing: ― If there is a malfunction in the recliner position sensor, clear all the memory positions. • Memory seat positioning using position memory switch and remote transmitter: ― If there is a malfunction in the recliner position sensor, inhibits all memory seat positioning. ― If there is a malfunction in the recliner motor, inhibits recliner motor seat positioning. • Recliner motor seat positioning using power seat switch: ― If there is a malfunction in the recliner motor, inhibits recliner motor seat positioning. • Memory registration using position memory switch and remote transmitter: ― If there is a malfunction in the recliner position sensor, inhibits the memory registration. ― If there is a malfunction in the recliner motor and the malfunction is caused by short circuit, inhibits the memory registration.
U0100:00	• Memory seat positioning using position memory switch and remote transmitter: ― If the ignition is switched ON (engine off or on), inhibits all memory seat positioning.
U0101:00^*1	• Memory seat positioning using position memory switch and remote transmitter: ― If the ignition is switched ON (engine off or on), inhibits all memory seat positioning.
U0151:00	• Memory seat positioning using position memory switch and remote transmitter: ― If the ignition is switched ON (engine off or on), inhibits all memory seat positioning.
U0155:00	• Memory seat positioning using position memory switch and remote transmitter: ― Inhibits all memory seat positioning.
U0214:00	• Memory seat positioning using remote transmitter: ― Inhibits all memory seat positioning. • Memory registration using remote transmitter: ― Inhibits the memory registration.
U3003:16	• Not applicable

*1 :ATX