Power Window Control System: Overview Infiniti M37 IV

Component Description

Scheme 1

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 open when pressing Intelligent Key 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 transmits to power window switch as the encoder pulse signal 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.

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 transmits to power window switch as the encoder pulse signal 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

1. 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.

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

Initialize the system if any of the following work has been done.

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

Initialize the system if any of the following work has been done.

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

Initialize the system if any of the following work has been done.

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

Initialize the system if any of the following work has been done.

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

Note. Before performing the diagnosis in the following procedure, check "Work Flow". Refer to " DIAGNOSIS AND REPAIR WORK FLOW ".