Memory Positioning Systems: Description and Operation

Description

Optimal mirror position setting can be registered in the mirror control unit by IMS control switch and mirror position sensor by the driver. (This is so called registration operation No.1). Therefore, registered position can be replayed by one touch even after the mirror position has been changed. (This is replay operation No.1). In addition, the keyless can restore the original mirror position that it used be when the driver left the vehicle. (Only if the mirror position has been changed). (This is called replay operation No.2). Above mentioned function can accommodate 2 drivers in maximum.

Function

Mirror position control
Mirror position sensor reads each mirror motor displacement all the time. Mirror position is registered by the registration command through the IMS switch operation. Likewise, mirror position replay is performed by the replay command through the IMS switch operation. As shown in the system component diagram, manual control of mirror position is performed by the input from the mirror switch, which has the priority over registration and replay control.

Motor drive control
1. Driving sequence
In principle, driving sequence is from horizontal direction to vertical direction. As for the displacement in one direction while the mirror is driving in the other direction, hysteresis of target value ± 0.06V is set.
2. Control in memory replay
(1) View range setting
View range should satisfy the following criteria considering the structure of the mirror.
A. Horizontal direction: 1.5 - 3.5V
B. Vertical direction: 1.5 - 3.5V
Specifically speaking, view range here indicates the following
A. Mirror control range not limited by the mechanical lock in the unit itself.
B. Mirror control range not affecting the sensor characteristics (sensing linearity)
(2) Determination of driving path
Since mirror can be mechanically locked due to the structure outside the view range, it is wise to set the driving path while driving the mirror to prevent those mechanical locks.
(3) Detection of the lock
Motor driving time is monitored using the timer to detect the lock.
Monitoring of the replay execution time: If the replay operation does not complete within the 40 seconds after the start of the replay control, then stop the motor output and terminates the control.
3. Outside mirror auto-reverse function
(1) When the "R" of the shift lever is changed from 0 to 1, pull down the outside mirror for 5 degrees by the position of mirror selection switch.
(2) When the "R" is changed from 1 to 0, it returns to the registered position. (previous position before "R" is changed to 1 from 0)
(3) When the mirror selection switch is in L: Left and right outside mirror all moves together.
(4) When the mirror selection switch is in R: only the right outside mirror moves.
(5) When the mirror selection switch is in neutral: Nothing moves.
(6) Manual switch input during the mirror down operation: It stops the current operation and operates only by the manual switch, and returns to the registered position when "R" is changed to 0 form 1.
(7) Mirror switch input during the mirror down operation: It stops the current operation and returns to the registered position when "R" is changed to 0 form 1.
(8) Manual switch input during the returning operation: It stops the returning operation and operates by the switch input.
(9) Position switch input during the returning operation: It completes the returning operation if it is replay-prohibiting condition, otherwise it performs the replay operation.
(10) If the stop switch is inputted during the operation, it stops the operation and returns to the previously registered position when "R" is changed to 0 from 1. It stops returning if it is in returning operation.
(11) Auto-reverse prohibiting operation
A. When the ignition OFF
B. When the auto switch is OFF
C. When the stop switch is ON
D. When the manual switch is ON