Power Window Control System (Except Hybrid): Overview Infiniti QX60 I

Windows 1 illustration ~803 words

Component Description

Component	Function
BCM	Supplies power to the window switches. Controls retained power.
Main power window and door lock/unlock switch	Directly controls all power window motors.
Power window and door lock/unlock switch RH	Controls power window motor of passenger door.
Rear power window switch	Controls anti-pinch operation of power window. Controls right and left power window motors for the rear doors.
Power window motor	Integrates the ENCODER and WINDOW MOTOR. Starts operating with signals from each power window switch. Transmits power window motor rotation as a pulse signal to power window switch. Controls anti-pinch operation for all windows.
Front door lock assembly LH (key cylinder switch)	Transmits operation condition of door key cylinder switch to power window main switch.
Front door switch LH/RH	Detects door open/close condition and transmits it to the BCM.

Scheme 1

Scheme 1: System Diagram

POWER WINDOW OPERATION

Power window system is activated by the power window switch when the ignition switch is in the ON position or during the retained power operation after ignition switch turns OFF.
Power window main switch can open/close door glass.
Front and rear power window switch can open/close the corresponding door glass.
Power window lock switch can lock all power windows other than driver seat.
All power windows open when pressing Intelligent Key unlock button for 3 seconds.
If door glass receives resistance that is more than the specified value and the power window is in the AUTO-UP operation, power window will move in the reverse direction (Anti-Pinch Function).
Power window serial link transmits the signals from power window main switch to each power window switch.

POWER WINDOW AUTO-OPERATION

AUTO-UP/DOWN operation can be performed when each power window motor turns to AUTO.
Encoder continues detecting the movement of power window motor and output the encoder pulse signal to power window switch while power window motor is operating.
Power window switch reads the changes of encoder signal and stops AUTO operation when door glass is at fully opened/closed position.
Power window motor is operable in case encoder is malfunctioning.
AUTO function does not operate if encoder is malfunctioning.

RETAINED POWER OPERATION

Retained power operation is an additional power supply function that enables power window system to operate during the 45 seconds even when ignition switch is turned OFF.

ANTI-PINCH OPERATION

Pinch foreign material in the door glass during Auto-Up operation, and it is the anti-pinch that lowers the door glass 150 mm (5.9 in) or 2 seconds when detected.
Encoder continues detecting the movement of power window motor and transmits to the power window switch as the encoder pulse signal while power window motor is operating.
Resistance is applied to the power window motor rotation that changes the frequency of encoder pulse signal if foreign material is trapped in the door glass.
Power window switch controls to lower the door glass for 150 mm (5.9 in) or 2 seconds after it detects encoder pulse signal frequency change.

Operation Condition

When all door glass AUTO-UP operation is performed (anti-pinch function does not operate just before the door glass closes and is fully closed)

Note. Depending on environment and driving conditions, if a similar impact or load is applied to the door glass, it may lower.

DOOR KEY CYLINDER SWITCH OPERATION

Hold the door key cylinder to the LOCK or UNLOCK direction for 1 second or more to OPEN or CLOSE all power windows when ignition switch is OFF. In addition, it stops when key position is moved to N (NEUTRAL) when operating.

Ignition switch OFF.
Hold door key cylinder to LOCK position for 1 second or more to perform CLOSE operation of the door glass.
Hold door key cylinder to UNLOCK position for 1 second or more to perform OPEN operation of the door glass.

Description

When the negative battery terminal is disconnected, the initialization is necessary for normal operation of power window system.

CAUTION

The following specified operations can not be performed under the non-initialized condition. Auto-up operation Anti-pinch function