Infiniti EX35. Manual - part 1250

HEATED SEAT

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HEATED SEAT

System Description

INFOID:0000000003642141

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

Component Parts Location

INFOID:0000000003642142

Component Description

INFOID:0000000003642143

1.

Heated seat switch (driver side) 
M172

2.

Heated seat switch (passenger side) 
M173

3.

Seat back heater
• Driver side B412
• Passenger side B432

4.

Seat cushion heater
• Driver side B412
• Passenger side B432

5.

Heated seat relay M70

A.

Behind cluster lid C

JMJIA1541ZZ

Item

Function

Heated seat switch

• Power is supplied to each heater
• Depending on LOW/HIGH position of switch, operating heater number is changeable

Seat cushion heater

Built-in seat cushion, heater operate with the power supplied from heater seat switch

Seat back heater

Built-in seatback, heater operate with the power supplied from heater seat switch

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LUMBAR SUPPORT

LUMBAR SUPPORT

System Description

INFOID:0000000003642155

• 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:0000000003642156

Component Description

INFOID:0000000003642157

1.

Lumbar support switch B457

2.

Lumbar support motor B458

A.

View with seat back pad is removed

JMJIA1542ZZ

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

REAR SEATBACK RELEASE CONTROL

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REAR SEATBACK RELEASE CONTROL 

System Description

INFOID:0000000003642148

• Rear seatback release control is composed of rear seatback release switch and rear seatback release actu-

ator

• When rear seatback release switch is pressed, the rear seatback release actuator operate in order to unlock

the rear seatback lock

• When the rear seatback is unlocked, the spring located inside the rear seat device rebound, and the rear

seatback return to the fall down position

Component Parts Location

INFOID:0000000003642149

Component Description

INFOID:0000000003642150

1.

Rear seatback release switch (LH) 
B49

2.

Rear seatback release actuator (RH) 
B506

3.

Rear seatback release relay (LH) 
B246

4.

Rear seatback release relay (RH) 
B247

A.

In seatback

B.

Behind of rear seat (RH)

JMJIA1543ZZ

Item

Function

Rear seatback release switch

Release the rear seatback when it is locked

Rear seatback release actuator 

Pressed the rear seatback release switch to release the rear seatback when it is locked

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< FUNCTION DIAGNOSIS >

REAR SEATBACK POWER RETURN SYSTEM

REAR SEATBACK POWER RETURN SYSTEM

System Diagram

INFOID:0000000003642151

System Description

INFOID:0000000003642152

DESCRIPTION

Rear Seatback Release Control

• Rear seatback release control is composed of rear seatback release switch and rear seatback release actu-

ator

• When rear seatback switch is pressed in release direction, the rear seatback release actuator operate in

order to unlock the rear seatback lock

• When the rear seatback is unlocked, the spring located inside the rear seat device rebound, and the rear

seatback return to the fall down position.

Rear Seatback Power Return System

• The rear seat back power return system is the system that enables the return operation of the left and right

rear seatbacks independently by pressing and holding the power return switch or the rear seatback switch in
the UP direction.

• As for the safety mechanism, the reverse operation is performed if the switch is released during the return

operation. The anti-pitch function is installed so that the automatic reverse operation is performed if the
pinching of foreign materials between the left and right rear seatbacks is detected. 

OPERATION DESCRIPTION

The rear seatback power return system consists of the sector gear that transmits the movement information of
rear seatback power return control unit, power return switch, power return motor, motor sensor, primary posi-
tion limit switch, return complete limit switch and power return motor. 

Return Operation Starting Condition

The rear seat back return operation starts when all of the following conditions are satisfied.
• Vehicle speed 2 km/h (1 MPH) or less
• Return complete limit switch: ON
• The battery voltage is normal

JMJIA1539GB

Operation 
sequence

Rear seatback condition

Sector gear condition

Primary position limit 

switch

Return complete limit 

switch

1

Return completion position

Initial position

OFF

OFF

2

Fold-down position

Initial position

OFF

ON

3

Active

Return non-completion po-

sition

OFF 

→

 ON

ON