Nissan Murano Z51. Manual - part 1205

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< SYSTEM DESCRIPTION >

LUMBAR SUPPORT

LUMBAR SUPPORT

System Description

INFOID:0000000005518134

• 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

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Component Description

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1.

Lumbar support switch 
B457 (With automatic drive position-
er)
B407(Without automatic drive posi-
tioner)

2.

Lumbar support motor 
B458 (With automatic drive position-
er)
B408(Without automatic drive posi-
tioner)

A.

View with seat back pad is removed

JMJIA1458ZZ

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 the forward and backward 
movement of seatback support device

TILT&TELESCOPIC SYSTEM

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TILT&TELESCOPIC SYSTEM

System Diagram

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System Description

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Power from battery is supplied at all times to automatic driver positioner control unit, tilt & telescopic system
can operate regardless of the ignition switch position.

TILT OPERATION

• While operating the tilt & telescopic switch, tilt motor operates, and allows up or down position adjustment of

steering wheel.

TELESCOPIC OPERATION

• Operating the tilt & telescopic switch, telescopic motor operates and allows forward and backward position

regulation of steering wheel.

Component Parts Location

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JMJIA1550GB

1.

Automatic drive positioner control 
unit M75, M104

2.

Tilt & telescopic switch M102

3.

Tilt motor M116

4.

Telescopic motor M117

A.

View with instrument lower panel 
(LH) is removed.

B.

View with steering column cover is 
removed.

JMJIA1551ZZ

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< SYSTEM DESCRIPTION >

TILT&TELESCOPIC SYSTEM

Component Description

INFOID:0000000005518140

Item

Function

Automatic drive positioner control unit

Detects data input signal of tilt & telescopic switch, performs tilt & telescopic motor con-
trol

Tilt & telescopic switch

Tilt switch and telescopic switch, as a unit, transmit switch operation signal to automatic 
drive positioner control unit

Tilt & telescopic motor

Operates with the power received from automatic drive positioner control unit

REAR SEATBACK POWER RETURN SYSTEM

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< SYSTEM DESCRIPTION >

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REAR SEATBACK POWER RETURN SYSTEM

System Diagram

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System Description

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DESCRIPTION

• 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 on the instrument panel or in
the luggage room.

• As for the safety mechanism, the reverse operation is performed if the power return 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

• In the condition that the rear seatback is raised (return completion position), the sector gear is in the initial

position and the primary position limit switch and return complete limit switch are OFF. 

• When manually operating the rear seatback to the fold-down position, the return complete limit switch turns

ON, and the rear seatback power return control unit judges that the rear seatback is tilted (return non-com-
pletion position). 

JMJIA1393GB

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

4

Return completion position

Return completion position

ON

OFF

5

Initial position

OFF

OFF