System Description

SYSTEM (AUTOMATIC BACK DOOR SYSTEM)

System Description

The automatic back door system performs the automatic open/close operation of the back door by operating the automatic back door switch, the automatic back door close switch, the back door opener switch, and Intelligent Key.

AUTOMATIC BACK DOOR OPEN/CLOSE FUNCTION

- In the case of the back door fully closed, operate the automatic back door switch, Intelligent Key or back door opener switch with the back door unlock. The back door closure motor releases the latch, then the spindle motor opens the back door to the fully open position. The closure motor reverses to the neutral position simultaneously.
- In the case of the back door fully open, operate the automatic back door switch, Intelligent Key or automatic back door close switch. The spindle motor closes the back door to the half-latch position, then the back door closure motor to the full latch position. Then, the closure motor reverses to the neutral position.

AUTOMATIC OPEN/CLOSE TEMPORARY STOP FUNCTION

Revision: March 20122013 Infiniti JX
Automatic open/close temporary stop function temporarily stops the open/close operation by operating back door opener switch during automatic open/close operation or by turning automatic back door main switch OFF.
Back Door Opener Switch Operation
- Automatic open/close operation stops when back door opener switch is operated during automatic open/
close operation.
- Back door performs automatic open operation in an open direction when back door opener switch is operated again during automatic open/close temporary stop function operation.
- Back door performs automatic close operation in a close direction when automatic back door close switch is operated during automatic open/close temporary stop function operation.
- Automatic operation is performed again, in the direction that automatic back door switch operated before stopping, when automatic back door switch or Intelligent Key button is operated during automatic open/close temporary stop function operation.
Automatic Back Door Main Switch Operation
- While automatic back door main switch is ON, automatic open/close operation stops when automatic back door main switch is turned OFF during automatic open/close operation.
- While automatic back door main switch is OFF, automatic open/close operation stops when automatic back door main switch is turned ON then turned OFF during automatic open/close operation.
- Back door performs automatic open operation in an open direction when back door opener switch is operated again during auto open/close temporary stop function operation.
- Back door performs automatic close operation in a close direction when automatic back door close switch is operated during automatic open/close temporary stop function operation.
- Automatic operation is performed again, in the direction that automatic back door switch operated before stopping, when automatic back door switch or Intelligent Key button is operated during automatic open/close temporary stop function operation.

BACK DOOR OPEN POSITION SETTING FUNCTION

Back door open position setting function enables a user to set stop position for automatic open operation.
Setting Procedure
Stop position for back door open position setting function can be set by the following procedure.
1.Manually move the back door to a stop setting position.
2.Press and hold the automatic back door close switch for 3 seconds while maintaining the back door position.
3.The switching is complete when the buzzer sounds (pattern E).
4.Fully close the back door.
Cancellation Procedure
Setting of back door open position setting function can be cancelled by the following procedure.
1.Manually move the back door to a fully open position.
2.Press and hold the automatic back door close switch for 3 seconds.
3.The switching is complete when the buzzer sounds (pattern E).
4.Fully close the back door.

BACK DOOR AUTO CLOSURE FUNCTION

Open Function
When back door opener switch is pressed and automatic back door main switch in the OFF position, BCM
transmits the back door open request signal to automatic back door control module via CAN communication, and automatic back door control module opens back door lock assembly.
Closure Function
When the back door is closed to the half-latch position, the motor drives to rotate the latch lever and pulls it in from half latched to fully latched and automatically closes the door. Then, the closure motor reverses to the neutral position.

WARNING FUNCTION

The warning function is as follows and gives the user warning information using automatic back door warning chime and hazard warning lamps.
Chime Operation Condition
Revision: March 20122013 Infiniti JX






ANTI-PINCH FUNCTION

During auto open operation, if an object is detected by encoder pulse in the door's path, a warning chime sounds and the back door operates in the reverse direction to prevent pinching.
During auto close operation, if an object is detected by the touch sensors and encoder pulse in the door's path, a warning chime sounds and the back door operates in the open direction until it is fully open.
Operation Condition





Revision: March 20122013 Infiniti JX

AUTOMATIC BACK DOOR OPEN/CLOSE OPERATION CONDITION







CONTROL IF NOT WITHIN THE OPERATION CONDITIONS DURING THE OPERATION

If the back door is not within the operation conditions during the operation, the automatic back door control module performs the control as follows.





Revision: March 20122013 Infiniti JX

TIME CHART FOR AUTOMATIC BACK DOOR SYSTEM

Fully Closed to Fully Open Operation
When operating the automatic back door switch, automatic back door opener switch and Intelligent Key in the fully closed position, the system operates as follows.





1.Operates the chime and hazard after the operation enable conditions are established.
2.The back door closure motor performs the open operation after the chime (pattern A) stops sounding.
3.Stops the back door closure motor open operation after turning the open switch to ON
Revision: March 20122013 Infiniti JX
Then, operate the spindle motor to perform the back door open operation.
4.The back door closure motor performs the close operation after turning the half latch switch to ON.
5.Stop the back door closure motor close operation and return the latch to the neutral position after turning the close switch to OFF.
NOTE:
In the operation of steps 3 and 4, the inputs of half latch switch, open switch, and close switch may be different according to the reaction force of the back door weatherstrip. Refer to the area encircled by a broken line in the Time chart (fully closed to fully open operation).
Fully Open to Fully Closed Operation
When operating the automatic back door switch, automatic back door close switch and Intelligent Key, the automatic back door system operates as follows.





1.Operates the chime and hazard after the operation enable conditions are established.
2.After the chime (pattern A) stops sounding, operates the spindle motor to perform the back door close operation.
3.The back door closure motor performs the close operation in 300 msec. or more after turning the half latch switch to OFF.
4.The back door closure motor performs the open operation after turning the close switch to ON.
Revision: March 20122013 Infiniti JX
5.Stop the back door closure motor open operation and return the latch to the neutral position after turning the close switch to OFF.
Revision: March 20122013 Infiniti JX