Nissan Quest E52. Manual - part 1046

SYSTEM

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SYSTEM

POWER SEAT SYSTEM

POWER SEAT SYSTEM : System Description

INFOID:0000000009652934

Power seat switch can be operated regardless of the ignition switch position, because power supply is always
supplied to power seat switch.

SLIDING OPERATION

While operating the sliding switch located in power seat switch, sliding motor operates and makes possible the
seat front and back position adjustment.

RECLINING OPERATION

While operating the reclining switch located in power seat switch, reclining motor operates and makes possi-
ble the seat back forward and backward position adjustment.

LIFTING OPERATION

While operating the lifting switch located in power seat switch, lifting motor operates and makes possible the
seat cushion up and down position adjustment.

LUMBAR SUPPORT

While operating the lumbar support switch, lumbar support motor operates which allows forward and back-
ward operation of seatback support.

HEATED SEAT SYSTEM

HEATED SEAT SYSTEM : System Description

INFOID:0000000009652935

Heated seat is a system that operates when ignition switch is in ON position.

HEATER OPERATION

• While operating the heated seat switch, seat cushion heater and seat back heater operate.
• Temperature of seat can be adjusted by operating on heated seat switch.

SEATBACK POWER FOLDING/RETURN SYSTEM

SEATBACK POWER FOLDING/RETURN SYSTEM : System Description

INFOID:0000000009652936

SYSTEM DIAGRAM

DESCRIPTION

Seatback power folding/return system (electric return type) consists of seatback power return control unit
(buzzer is integrated), third seat fold switch, power return motor (motor sensor is integrated), sector gear posi-
tion limit switch, seatback angle limit switch, and sector gear that transfers the movement of power return

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SYSTEM

motor. The seatback LH and RH of third seat can be folded up or down independently according to the opera-
tion of third seat fold switch in luggage room.

Operation Condition

Seatback power folding/return operation (electric type) starts when all of the following conditions are satisfied.
• Vehicle speed 2 km/h (1 MPH) or less
• Seatback angle limit switch is ON
• Battery voltage is normal

Seatback Power Fold/Return Operation

When third seat fold switch is operated, seatback power return control units checks whether or not the opera-
tion conditions are satisfied, and then controls the return operation of third seatback.
Status of each part is as described in the following table.

1.

When third seatback is in folded up status (return complete position), sector gear is in the initialization
position. Sector gear position limit switch and seatback angle limit switch are in the OFF position.

2.

When third seat fold switch is pressed in the direction of folding down, seatback lock release actuator
operates, winds wire of seatback lock assembly, and then releases seatback lock.
When seatback lock is released, seatback folds down by repulsion of spring in seatback.

No.

Third seatback condition

Sector gear position

Sector gear position 

switch

Seatback angle limit 

switch

1

Return complete position

A: Third seatback
B: Seat cushion

Initial position

OFF

OFF

2

Fold down position

A: Third seatback
B: Seat cushion

Initial position

OFF

ON

3

Return operation

A: Third seatback
B: Seat cushion

Return incomplete 

position

OFF 

→

 ON

ON

4

Return complete position

A: Third seatback
B: Seat cushion

Return complete 

position

ON

OFF

5

Initial position

OFF

OFF

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SYSTEM

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When third seatback folds down, seatback angle limit switch turns ON, and seatback power return control
units judges that third seatback is in the folded down status (folding down position).

3.

When third seat fold switch is pressed in the direction of folding up, seatback power return control unit
supplies power supply to power return motor and sounds return operation start buzzer.
Power return motor, which is supplied power from seatback power return control unit, rotates to the folding
up direction, and operates third seat return operation via sector gear.
When sector gear starts to rotate in the folding up direction, sector gear position limit switch tuns ON, and
seatback power return control unit judges that sector gear is in a position other than the initial position.

4.

When third seat folds up to the return complete position, seatback angle limit switch turns OFF, and seat-
back power return control unit sounds return completion buzzer and stops power return motor.
When power return motor is stopped, after 0.2 seconds, seatback power return control unit rotates power
return motor in the reverse direction so that sector gear returns to the initial position.

5.

When sector gear returns to the initial position according to the reverse rotation of power return motor,
sector gear position limit switch turns OFF and seatback power return control unit stops the reverse rota-
tion of power return motor, and the return operation is complete.

NOTE:
• When third seat fold switch is released during return operation (sector gear position limit switch and seat-

back angle limit switch are in the ON position), seatback power return control unit detects third seat fold
switch OFF signal, rotates power return motor in the reverse direction, and then returns third seatback to the
folded down position. 
When third seat fold switch is pressed again during reverse operation, return operation restarts.

• When battery cable is disconnected from battery terminal while sector gear is in a position other than the ini-

tial position (sector gear position limit switch is in the ON position), and then when battery cable is connected
again to battery terminal, sector gear returns to the initial position.

Anti-Pinch Function

When signal change from motor sensor is detected during third seatback return operation, due to foreign
material trapping, seatback power return control unit sounds buzzer, stops power return motor, and rotates
power return motor in the reverse direction after 0.2 seconds. Third seatback returns to the folded down posi-
tion.

Sector Gear Reverse Starting Condition

Sector gear rotates in the reverse direction when any of the following conditions is satisfied.
• Third seatback return operation is complete (seatback angle limit switch: OFF)
• Third seat fold switch is released before return operation is complete
• Trapping is detected
• Lock status of power return motor is detected
• Third seatback return operation is not complete within 60 seconds
• Battery voltage malfunction is detected during return operation
• Battery voltage returns to normal after battery voltage malfunction is detected during return operation
• Sector gear position limit switch does not turn from OFF to ON within the specified number of times of motor

pulse from the start of return operation

The reverse rotation operation stops when any of the following conditions is satisfied.
• Sector gear initial position (sector gear position limit switch: OFF)
• Lock status of power return motor is detected (lock during reverse rotation operation)
• The sector gear initial position is not completed within 60 seconds

Consumption Electricity Control System

Seatback power return control unit controls electric power so that electric power consumption can be reduced
according to the vehicle condition.

Low Electric Power Consumption Mode

The system shifts to low electric power consumption mode when all the following conditions are satisfied.
• Third seat fold switch is OFF
• Power return motor is not in operation
• When the condition that the vehicle speed is 2 km/h (1 MPH) or less continues for 30 seconds or more
The system releases low electric power consumption mode when any of the following conditions is satisfied.
• When third seat fold switch is pressed
• When the change occurs to the pulse of vehicle speed sensor
For low electric power consumption mode, the following functions are available.
• Power supply for sector gear position limit switch and seatback angle limit switch is turned OFF
• Power supply for motor sensor is turned OFF when power return motor is not in operation

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Buzzer Operation Pattern And Order Priority

Seatback power return control unit sounds a buzzer according to third seatback return operation status. When
buzzer sounding conditions are satisfied at the same time, the highest buzzer pattern are as described in the
following table.

Operation type

Sound pattern

Priority

Malfunction

1

Return operation completed

2

Start return operation

3

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