Automatic Drive Positioner: Overview Nissan Quest IV

DESCRIPTION

The system automatically moves the driver seat and door mirror position by the driver seat control unit and the automatic drive positioner control unit. The driver seat control unit corresponds with the automatic drive positioner control unit by UART communication.

Sleep Control

Driver seat control unit equips sleep control for reducing power consumption.

The system switches to sleep control when all of the following conditions are satisfied.

1. Ignition switch is OFF.
2. All devices of auto driving position system are not operating.
3. 45 seconds timer of driver seat control unit is not operating.
4. Set switch and memory switch (1 and 2) are OFF.

Wake-up Control

Sleep control releases when detecting status change in either of the following item.

1. CAN communication
2. Power seat switch
3. Set switch and seat memory switch (1 and 2)

Scheme 1

Scheme 2

Scheme 3

Scheme 4

1. The driving position (seat and door mirror position) can be adjusted manually with power seat switch and door mirror remote control switch.
2. The power seat can be operated manually regardless of the ignition switch position.
3. The door mirrors can be operated manually when ignition switch is in either ACC or ON position.
4. When power seat switch is operated, operation signal is transmitted to driver seat control unit. Each motor is operated according to operation signal.
5. When mirror switch and changeover switch are operated, operation signal is transmitted to automatic drive positioner control unit. Mirror motor is operated according to operation signal.

Scheme 5

1. The driver seat control unit can store the optimum driving positions (seat and door mirror position) for 2 people. If the front seat position is changed, one-touch (pressing desired memory switch) operation allows changing to the other driving position.
2. When memory switch 1 and 2 are operated, operation signal is transmitted to driver seat control unit.
3. When driver seat control unit detects that memory switch is pressed for 0.5 seconds or more, driver seat control unit operates each motor of driver seat and detects the driver seat position according to signals transmitted from each sensor. Driver seat control unit requests the operation of mirror motor to automatic drive positioner control unit via UART communication.
4. Automatic drive positioner control unit operates mirror motor, detects the door mirror position according to signal transmitted from mirror sensor, and transmits the detected door mirror position to driver seat control unit via UART communication.
5. Driver seat control unit stops the operation of each motor when each part reaches the memorized positions.
6. Driver seat control unit turns memory indicator lamp OFF that is blinking while each motor operates.

Note. Further information for the memory storage procedure. Refer to " WORK PROCEDURE ".

Operation Condition

Satisfy all of the following items. The memory function is not performed if these items are not satisfied.

Timer Function

1. The memory function can be performed for 45 seconds after opening the driver door even if the ignition switch position is in OFF position.
2. Satisfy all of the following items. The timer function is not performed if these items are not satisfied.

Scheme 6

1. This function slides driver seat toward vehicle rear and facilitates entry/exit of the vehicle.
2. Seat slide set amount of exit assist function is adjustable.
3. When driver side door is open while operation conditions are satisfied, driver seat control unit receives front door switch (driver side) signal (open/close) from BCM via CAN communication. Driver seat control unit operates sliding motor and moves driver seat toward vehicle rear to the seat slide set amount when driver seat control unit detects that driver side door is open.
4. Driver seat control unit receives sliding sensor position signal from sliding sensor. Driver seat control unit stops the operation of sliding motor when driver seat control unit detects that driver seat is slid to the seat slide set amount.

Note. This function is set to ON before delivery (initial setting). Further information for the system setting procedure. Refer to " DESCRIPTION ".

Operation Condition

Satisfy all of the following items. The exit assist function is not performed if these items are not satisfied.

Scheme 7

1. This function allows the driver seat control unit to return the driver seat from the exiting position to the previous driving position, when ignition switch is operated from OFF to ACC.
2. Entry assist function stops when starter signal is ON while entry assist function is being operated. Entry assist function restarts when starter signal is OFF.
3. When ignition switch is operated OFF to ACC while operation conditions are satisfied, driver seat control unit receives ACC signal from BCM via CAN communication. Driver seat control unit operates sliding motor when driver seat control unit detects that ignition switch is changed to ACC.
4. Driver seat control unit receives sliding sensor position signal from sliding sensor. Driver seat control unit stops the operation of sliding motor when driver seat control unit detects that driver seat is returned to the previous driving position from the exiting position.

Note. This function is set to ON before delivery (initial setting). Further information for the system setting procedure. Refer to " DESCRIPTION ".

Operation Condition

Satisfy all of the following items. The entry assist function is not performed if these items are not satisfied.

Scheme 8

1. By associating Intelligent Key and automatic drive positioner system, the unlock operation of Intelligent Key or driver side door request switch performs memory function and entry/exit function.
2. Registration of Intelligent Key interlock function can register a different key ID to the driver seat control unit, one by one, for memory switch 1 and 2. A total of 2 key IDs can be registered.
3. Driver seat control unit receives door unlock signal and key ID signal from BCM when driver side door is unlocked using Intelligent Key or driver side door request switch.
4. Driver seat control unit automatically adjusts driver seat and door mirror to the driving position according to key ID. Driver seat performs turnout position and sets to standby status.
5. In standby status, when ignition switch is operated from OFF to ACC, return operation sets driver seat to the registered position.

Note. When another key ID is newly registered to a key switch to which a key ID is already registered, the previously registered key ID is overwritten and becomes unusable. When starter signal turns ON during return operation, the operation is interrupted, starter signal turns from ON to OFF, and operation restarts. Further information for Intelligent Key interlock function. Refer to " DESCRIPTION ".

Operation Condition

Satisfy all of the following items. The Intelligent Key interlock function is not performed if these items are not satisfied.

Each function is reset to the following condition when the battery terminal is disconnected.

Note. Notice that disconnecting the battery when detected DTC are present will erase the DTC memory.

Each function is reset to the following condition when the driver seat control unit is replaced.

Note. Notice that disconnecting the battery when detected DTC are present will erase the DTC memory.

Always perform the initialization when the battery terminal is disconnected or the driver seat control unit is replaced.

The entry/exit assist function will not operate normally if no initialization is performed.

Always perform the memory storage when the battery terminal is disconnected or the driver seat control unit is replaced. The memory function will not operate normally if no memory storage is performed.

Always perform the Intelligent Key interlock function storage when the battery terminal is disconnected or the driver seat control unit is replaced. The Intelligent Key interlock function will not operate normally if no memory storage is performed.

The settings of the automatic driving positioner system can be changed, using CONSULT and the set switch. Always check the settings before and after disconnecting the battery terminal or replacing driver seat control unit.

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Modern vehicle is equipped with many electronic control unit, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H-line, CAN L-line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

Driver seat control unit performs UART communication with the automatic drive positioner control unit using 1 communication lines. Driver seat control unit receives the operation signals of door mirror remote control switch and the position signals of door mirror sensor from the automatic drive positioner control unit and transmits the operation request signal.

The following symptoms are normal operations, and they do not indicate a malfunction.

Scheme 9

1. Remove driver seat. Refer to " «REMOVAL AND INSTALLATION»(ref-672657-S09690577832014112400000) ".
2. Remove screws (A), and then remove driver seat control unit (2) from seat cushion frame (1)

See also:
• DOOR LOCK SYSTEM: COMPONENT PARTS LOCATION