Nissan Murano Z51. Manual - part 1206

SE-12

< SYSTEM DESCRIPTION >

REAR SEATBACK POWER RETURN SYSTEM

• When pressing the power return switch on the instrument panel or in the luggage room, the rear seatback

power return control unit detects the power return ON signal and supplies the power to the power return
motor. Then, the rear seatback power return control unit sounds the operation start buzzer.

• With the power supplied from the rear seat back power control unit, the power return motor rotates in the

return direction. The rear seatback starts the return operation via the sector gear.

• When the sector gear starts rotating in the return direction, the primary position limit switch turns ON. The

rear seatback power return control unit judges that the sector gear is in any position other than the initial
position. 

• When the rear seatback moves to the return position, the return complete limit switch turns OFF. The rear

seatback power return control unit activates the return completion buzzer and stops the power return motor.
Then, the rear seatback power return control unit reverses the power return motor after 0.2 seconds so that
the sector gear returns to the initial position.

• When the sector gear returns to the initial position by reverse rotation of the power return motor, the primary

position limit switch turns OFF. The rear seatback power return control unit stops the reverse operation of
the power return motor. The return operation is completed. 

• When releasing the power return switch during the return operation (both the primary position limit switch

and return complete limit switch are ON), the rear seatback power return control unit detects the power
switch OFF signal and returns the rear seatback to the fold-down position by the reverse rotation of the
power return motor. When pushing the switch again during the reverse operation, the return operation
restarts.

NOTE:
Disconnect the battery with the sector gear in any position other than the initial position (primary position limit
switch: ON). The sector gear is returned to the initial position when the battery is connected again. 

ANTI-PINCH OPERATION

When the pinch between RH/LH rear seatbacks is detected during the return operation, the malfunction
detecting buzzer sounds and the rear seatback returns to the fold-down position. 
• If there is a pinching of foreign materials between the left and right rear seatbacks during the return opera-

tion (both the primary position limit switch and return complete switch are ON), the voltage pulse of motor
sensor changes.

• When inputting the pinching signal from the motor sensor, the rear seatback power return control unit

sounds the malfunction detecting buzzer and stops the power return motor. Then, the rear seatback power
return control unit reverses the power return motor after 0.2 second so that the rear seatback returns to the
fold-down position.

SECTOR GEAR REVERSE STARTING CONDITION

If any of the following conditions are satisfied, the sector gear may be reversed. 

• Rear seatback return is completed (return complete limit switch: OFF)
• Release the power return switch before completing the return
• Pinch detection
• Lock detection of power return motor

(Lock at normal rotation)

• The rear seatback return is not completed within 60 seconds
• Detect the battery voltage malfunction during the return operation
• Return to the normal condition after detecting the battery voltage malfunction during the return operation
• The primary position limit switch does not turn OFF 

→

 ON within the specified motor pulse number from

starting the return operation. 

SECTOR GEAR REVERSE STOP CONDITION

If any of the following conditions are satisfied, the reverse operation stops.

• Sector gear initial position (primary position limit switch: OFF)
• Lock detection of power return motor (Lock during reverse operation)
• The sector gear initial position is not completed within 60 seconds
NOTE:
The battery voltage indicates the voltage between battery voltage (system) terminal 17 and GND (system) ter-
minal 32 of rear seatback power return control unit. It is normal when the voltage is 7.5 

±

 10% or more. If it is

less than the specified value, there is a malfunction. 

POWER CONSUMPTION CONTROL SYSTEM

Rear seatback power return control unit incorporates a power consumption control function that reduces the
power consumption according to the vehicle status.

REAR SEATBACK POWER RETURN SYSTEM

SE-13

< SYSTEM DESCRIPTION >

C

D

E

F

G

H

I

K

L

M

A

B

SE

N

O

P

Low Power Consumption Mode

If all of the following conditions are satisfied for 30 seconds period of time, the system shifts to the low power
consumption mode. 
• Power return switch is OFF
• Power return motor does not operate
• Vehicle speed 2 km/h (1 MPH) or less
If any of the following conditions are satisfied, the low power consumption mode is released. 
• When the power return switch is pressed
• When the change occurs to the pulse of vehicle speed sensor
There are the following functions as the low power consumption mode. 
• Turn the power supply of limit switch to OFF
• Turn the power supply of the motor sensor to OFF when the power return motor is not operated

INPUT/OUTPUT SIGNAL CHART

BUZZER OPERATION PATTERN AND ORDER OF PRIORITY

Item

Input signal to rear seatback 

power return control unit 

Rear seatback power return 

function

Actuator

Power return switch

Power return switch signal

Rear seatback power return 
control

Power return motor

Primary position limit switch

Primary position limit switch 
signal

Return complete limit switch

Return complete limit switch 
signal

Motor sensor

Motor sensor signal

Combination meter

Vehicle speed signal

Operation type

Sound pattern

Priority

Malfunction

1

Return operation completed

2

Start return operation

3

JMJIA1396ZZ

JMJIA1395ZZ

JMJIA1394ZZ

SE-14

< SYSTEM DESCRIPTION >

REAR SEATBACK POWER RETURN SYSTEM

Component Parts Location

INFOID:0000000005518143

Component Description

INFOID:0000000005518144

1.

Rear seatback power return control 
unit B492, B493

2.

Front power return switch (LH) M114 3.

Front power return switch (RH) M113

4.

Rear power return switch (LH) B106 5.

Primary position limit switch (RH) 
B495

6.

Power return motor assembly (RH) 
B494

7.

Sector gear (RH)

8.

Return complete limit switch (RH) 
B496

9.

Combination meter M34

A.

Back of rear seat (RH)

B.

Luggage side (LH)

C.

In seat device

JMJIA1410ZZ

Item

Function

Rear seatback power return control unit

Control the rear seatback power return system

Power return motor

Operate the rear seatback

Motor sensor

Detect the operation of power return motor

Power return switch

Switch that performs the return operation

Primary position limit switch

Detect the initial position of sector gear

Return complete limit switch

Detect the return position of rear seatback

Combination meter

Transmit the vehicle speed signal

Sector gear

Transmit the operation of power return motor to rear seatback

POWER SUPPLY AND GROUND CIRCUIT

SE-15

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

H

I

K

L

M

A

B

SE

N

O

P

DTC/CIRCUIT DIAGNOSIS

POWER SUPPLY AND GROUND CIRCUIT

REAR SEATBACK POWER RETURN CONTROL UNIT

REAR SEATBACK POWER RETURN CONTROL UNIT : Diagnosis Procedure

INFOID:0000000005518145

1.

CHECK FUSE

Check that the following fuses are not fusing.

Is the fuse fusing?

YES

>> Replace the blown fuse after repairing the affected circuit if a fuse is blown.

NO

>> GO TO 2.

2.

CHECK POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect rear seatback power return control unit connector.

3.

Check voltage between rear seatback power return control unit harness connector and ground.

Is the measurement value normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK GROUND CIRCUIT

Check continuity between rear seatback power return control unit harness connector and ground.

Does continuity exist?

YES

>> INSPECTION END

NO

>> Repair harness or connector.

AUTOMATIC DRIVE POSITIONER CONTROL UNIT

AUTOMATIC DRIVE POSITIONER CONTROL UNIT : Diagnosis Procedure

INFOID:0000000005518146

1.

CHECK FUSIBLE LINK

Check that the following fuse and fusible link are not fusing.

Is the fuse fusing?

Terminal No.

Signal name

Fuse No.

16

Battery power supply

32 (30A)

17

6 (10A)

(+)

(

−

)

Voltage

(Approx.)

Rear seatback power return control unit

Connector

Terminal

B492

16

Ground

Battery voltage

B493

17

Rear seatback power return control unit

Ground

Continuity

Connector

Terminal

B492

13

Existed

B493

32

Terminal No.

Signal name

Fusible link No.

25

Battery power supply

L (40A)