Power Window Control System: Overview Infiniti QX56 II

OPERATION PROCEDURE

1. Connect both battery cables. NOTE: Supply power using jumper cables if battery is discharged.
2. Turn the push-button ignition switch to ACC position. (At this time, the steering lock will be released.)
3. Disconnect both battery cables. The steering lock will remain released with both battery cables disconnected and the steering wheel can be turned.
4. Perform the necessary repair operation.
5. When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering wheel will lock when the push-button ignition switch is turned to LOCK position.)
6. Perform self-diagnosis check of all control units using CONSULT-III.

Scheme 1

Component Description

COMPONENT DESCRIPTION

Scheme 2

POWER WINDOW OPERATION

1. Power window system is activated by power window switch operation when ignition switch turns ON, or during the retained power operation after ignition switch turns OFF.
2. Power window main switch can open/close door glass.
3. Front and rear power window switch can open/close the corresponding door glass.
4. Power window lock switch can lock all power windows other than driver seat.
5. All power windows close when pressing Intelligent Key lock button or unlock button for 3 seconds.
6. If door glass receives resistance that is the specified value or more while power window of each seat is in AUTO-UP operation, power window operates in the reverse direction.
7. Power window serial link transmits the signals from power window main switch to each power window switch.
8. AUTO-UP/DOWN operation can be performed when front power window switch turns to AUTO.

POWER WINDOW AUTO-OPERATION

1. AUTO-UP/DOWN operation can be performed when each power window motor turns to AUTO.
2. 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.
3. Power window switch reads the changes of encoder signal and stops AUTO operation when door glass is at fully opened/closed position.
4. Power window motor is operable in case encoder is malfunctioning.
5. AUTO function does not operate if encoder is malfunctioning.

RETAINED POWER OPERATION

1. 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.

Retained Power Function Cancel Conditions

1. Front door CLOSE (door switch OFF)-->OPEN (door switch ON).
2. When ignition switch is ON again.
3. When timer time passes. (45 seconds)

ANTI-PINCH OPERATION

1. Anti-pinch foreign lowers door glass 150 mm (5.9 in) when foreign material is pinched in door glass during AUTO-UP operation.
2. 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.
3. 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.
4. Power window switch controls to lower the door glass for 150 mm (5.9 in) 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 1.5 seconds or more to OPEN or CLOSE all power windows when ignition switch is OFF. In addition, it stops when key position is moved to NEUTRAL when operating.

Operation Condition

1. Ignition switch OFF.
2. Hold door key cylinder to LOCK position for 1.5 seconds or more to perform CLOSE operation of the door glass.
3. Hold door key cylinder to UNLOCK position for 1.5 seconds or more to perform OPEN operation of the door glass.

Description

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

When the control unit replaced, the initialization in necessary for normal operation of power window system.

If any of the following operations are performed, the initialization is necessary for normal operation of power window system.

1. When control unit replaced.
2. Electric power supply to power window switch or motor is interrupted by blown fuse or disconnection and connection of the negative terminal of battery, etc.
3. Removal and installation of regulator assembly.
4. Power supply to the power window main switch or power window motor is cut off by the removal of battery terminal or if the battery fuse is blown.
5. Disconnection and connection of power window main switch harness connector.
6. Removal and installation of motor from regulator assembly.
7. Operation of regulator assembly as an independent unit.
8. Removal and installation of door glass.
9. Removal and installation of door glass run.

The following specified operations can not be performed under the non-initialized condition.

1. Auto-up operation
2. Anti-pinch function

If any of the following operations are performed, the initialization is necessary for normal operation of anti-pinch function.

1. When control unit replaced.
2. Electric power supply to power window switch or motor is interrupted by blown fuse or disconnection and connection of the negative terminal of battery, etc.
3. Removal and installation of regulator assembly.
4. Power supply to the power window main switch or power window motor is cut off by the removal of battery terminal or if the battery fuse is blown.
5. Disconnection and connection of power window main switch harness connector.
6. Removal and installation of motor from regulator assembly.
7. Operation of regulator assembly as an independent unit.
8. Removal and installation of door glass.
9. Removal and installation of door glass run.

The following specified operations can not be performed under the non-initialized condition.

1. Auto-up operation
2. Anti-pinch function