Infiniti EX35. Manual - part 1251

 

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Infiniti EX35. Manual - part 1251

 

 

REAR SEATBACK POWER RETURN SYSTEM

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• 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 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-completion position). 

• When pressing and holding the power return switch or the rear seatback switch in the UP direction, 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 switch during the return operation (both the primary position limit switch and return com-

plete 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

4

Return completion position

Return completion position

ON

OFF

5

Initial position

OFF

OFF

Operation 
sequence

Rear seatback condition

Sector gear condition

Primary position limit 

switch

Return complete limit 

switch

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REAR SEATBACK POWER RETURN SYSTEM

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.

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 or rear seatback 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 or rear seatback 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/rear seat-
back switch

Power return switch/rear seat-
back 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

Unified meter and A/C amp.

Vehicle speed signal

Operation type

Sound pattern

Priority

Malfunction

1

JMJIA1394ZZ

REAR SEATBACK POWER RETURN SYSTEM

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Component Parts Location

INFOID:0000000003642153

Return operation completed

2

Start return operation

3

Operation type

Sound pattern

Priority

JMJIA1395ZZ

JMJIA1396ZZ

1.

Rear seatback power return control 
unit B226, B227

2.

Rear seatback release relay (LH) 
B246

3.

Rear seatback release relay (RH) 
B247

4.

Power return switch (LH) M174

5.

Power return switch (RH) M175

6.

Rear seatback switch (LH) B52

7.

Primary position limit switch (RH) 
B505

8.

Sector gear (RH)

9.

Power return motor assembly (RH) 
B504

10. Return complete limit switch (LH) 

B513

11.

Rear seatback release actuator (LH) 
B513

12. Unified meter and A/C amp. M66, 

M67

A.

Behind of rear seat (RH)

B.

In seat device

C.

View with seatback pad is removed

D.

Behind cluster lid C

JMJIA1544ZZ

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REAR SEATBACK POWER RETURN SYSTEM

Component Description

INFOID:0000000003642154

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

Rear seatback switch

Performs the return operation or 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

Primary position limit switch

Detect the initial position of sector gear

Return complete limit switch

Detect the return position of rear seatback

Unified meter and A/C amp.

Transmit the vehicle speed signal

Sector gear

Transmit the operation of power return motor to rear seatback

 

 

 

 

 

 

 

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