Infiniti FX35, FX50 (S51). Manual - part 1621

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< SYSTEM DESCRIPTION >

POWER SEAT

SYSTEM DESCRIPTION

POWER SEAT

System Description

INFOID:0000000005236596

BCM can operate regardless of the ignition switch position, because battery power is supplied at all times to
power seat switch.

SLIDING OPERATION

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

RECLINING OPERATION

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

LIFTING OPERATION

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

Component Parts Location

INFOID:0000000005236597

1.

Sliding switch and lifting switch (driv-
er side) B414

2.

Reclining switch (driver side) B414

3.

Reclining motor (driver side) B415

4.

Lifting motor (rear) (driver side) B418 5.

Lifting motor (front) (driver side) 
B417

6.

Sliding motor (driver side) B416

A.

View with seat cushion pad and seat 
back pad removed.

B.

Backside of seat cushion

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POWER SEAT

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Component Description

INFOID:0000000005236598

Item

Function

BCM

Supplies at all times the power received from battery to power seat switch

Power seat switch

Built-in reclining switch, sliding switch and lifting switch, and controls the power supplied to each 
motor

Reclining motor

With the power supplied from power seat switch, operates forward and backward movement of 
seatback

Sliding motor

With the power supplied from power seat switch, operates forward and backward slide of seat

Lifting motor (front/rear)

With the power supplied from power seat switch, operates up and down movement of seat cushion

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< SYSTEM DESCRIPTION >

SIDE SUPPORT

SIDE SUPPORT

System Description

INFOID:0000000005236599

• While operating the side support switch, the pump located inside side support unit operates and adjusts the

air pressure in seat cushion and seatback side support.

• It is possible to soften the side support by allowing some air to escape or by deflating the solenoid located

inside side support. 

• It is possible to adjust seat cushion and seatback differently while inflating or deflating solenoid located in

side support unit.

Component Parts Location

INFOID:0000000005236600

Component Description

INFOID:0000000005236601

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1.

Side support (seat cushion)
(Side support unit B467)

2.

Side support (seat back)
(Side support unit B467)

3.

Side support unit B467

4.

Side support switch (seat back side)
B464

5.

Side support switch (cushion side)
B464

A.

View with seat cushion pad and seat 
back pad removed.

Item

Function

Side support switch

With a built-in cushion side and seat back side, and controls the power supplied to pump and to 
each solenoid.

Side support unit

Built-in pump, pump relay, and solenoid, and operates when pressing ON/OFF on side support 
switch. 

LUMBAR SUPPORT

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LUMBAR SUPPORT

System Description

INFOID:0000000005236602

• Lumbar support can operate regardless of the ignition switch position because battery power is supplied to it

at all times.

• While operating the lumbar support switch, lumbar support motor operates which allows forward and back-

ward operation of seatback support.

Component Parts Location

INFOID:0000000005236603

Component Description

INFOID:0000000005236604

1.

Lumbar support switch B457

2.

Lumbar support motor B458

A.

View with seat back pad removed

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Item

Function

Lumbar support switch

Controls the power supplied to lumbar support motor

Lumbar support motor

With the power supplied from lumbar support switch, operates forward and backward 
movement of seatback support device