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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