Kia Cee'd: IMS (Integrated Memory) / Description and operation

Description
system outline
An optimal seat position set by a driver can be memorized in Power seat unit by IMS SW, which enables restoration of seat position set by the driver despite
Playing of this function during drive is banned for safety reasons, and it has emergency stop function of restoration and gearing operation as well
Input Specification
1.
IGN2
IGN switch input is determined by Local switch “IGN2”.
2.
SEAT MANUAL switch : SEAT Input
(1)
SLIDE Front rear / rear right manual switch
Operating SLIDE motor of Seat either backward or forward
(2)
Recline Front rear / rear right switch
Operating recline motor of seat either backward or forward
(3)
Front rear height UP / DOWN manual switch
Operating Front rear height motor of SEAT either upward or downward
(4)
Rear right height UP / DOWN manual switch
Operating rear right height motor of SEAT either upward or downward
3.
SEAT position Sensor (pulse Signal)
Sensing movement amount of Slide, Recline, Front rear height, and Rear right height motor
4.
Dr Door switch
Sensing that drive door opens
5.
Speed
This signal is received for sensing vehicle speed by BCM
6.
IMS switch
(1)
SET switch
Allowing for saving the SEAT position set by driver
(2)
1, 2 switch
Saving and replaying the SEAT position set by driver
7.
CAN Communication LINE
Transmitting communication signals between IMS and BCM
CHATTERING Control in Input Signal
1.
Input switch - 40ms delay
SLIDE, RECLINE, Front rear height, rear right HEIGHT switch
“P” Position switch, SPEED, KEY IN, LOCAL KEY IN switch, DR DOOR switch, IGN2 switch
2.
IGN switch input is determined by Local switch “IGN2.
TIME Error
1.
±10%, for TIME without error indication
±50ms, for TIME not exceeding 500ms
2.
Indicated time in each function does not include Time of controlling CHATTERING started from changing point of rr input.
Operation
Control Specification
1.
MANUAL Operation
(1)
MANUAL Seat Operation SEAT is to be operated by MANUAL switch Input of SEAT. SLIDE, RECLINE, Front rear height, and rear right height is available to operate manually with IGN2 ON regardless of ECU B+ OFF.
2.
MEMORY Saving Operation
(1)
Allowing for Memory Storage
This process is allowed in case that IGN2 switch = ON, and SPEED input is high ( less than 3km/h ).
1 BUZZER output is generated from IMS by receiving the DATA, “SET = 1.”
(2)
Memory Saving Operation
When MEM_1 or MEM_2 of transmitted LIN communication DATA receives the DATA (“1”) by IMS switch generated from 1 or 2 switch control in memory storage permission mode above, 2 BUZZER outputs are generated and current seat position is stored. ( IMS switch transmits storage command only if 1 or 2 switch input is generated within 5 seconds from SET switch OFF->ON, and the storage permission mode is cancelled if more than 5 seconds are elapsed.)
(3)
Requirements for Memory Storage
MEMORY Storage is not allowed or cancelled in case that all of the following requirements are not met.
Ignition switch is ON
Vehicle speed input received from BCM is high ( less than 3Km/h )
Less than 5 seconds elapsed from SET switch OFF->ON (determined by IMS switch )
(4)
Memory SET is to be available for memory storage notwithstanding the number of SET times. (However, each MEMORY switch operation delivers 1 memory storage action only.)
(5)
If MEMORY command is received during operating easy access function or reproducing memory, activation is stopped, and current position is stored.
If the command is received during operating MANUAL switch of SEAT, it will be stored where the memory command is received.
Memory Reproduction
1.
Reproducing Memory
When “1” is received by DATA PL_1 or PL_2 of LIN communication transmitted by IMS switch generated from 1 or 2 switch operation, 1 BUZZER output is generated and SEAT position is automatically controlled, moving back to where it is stored to be according to MEMORY.
2.
Anti-Reproduction
Reproducing memory is not allowed if the following condition is not met.
IMS will reproduce memory, only if all of ① and ② are satisfied, and also either ③ or ④ is satisfied.
① Vehicle speed input received from BCM is high ( less than 3Km/h )
② MANUAL switch of SEAT is not operated.
③ 1 and 2 switch of IMS switch is ON in case that driver door is open or within 30 seconds from driver door close.
④ Ignition switch is ON
3.
Stopping Memory Reproduction
Reproducing memory is stopped unless all of the following conditions are met.
“P” Position switch of LOCAL switch is positioned at PARKING
Vehicle speed input received from BCM is high ( less than 3Km/h )
Target position of motor not reached
MANUAL switch of SEAT is not operated.
BUZZER output is operated for USER to understand reproduction by other UNIT, regardless that MANUAL switch of SEAT is ON.
SET switch is not operated
4.
Other
(1)
If memory is not stored, Reproduction will not be activated by 1 or 2 switch and BUZZER Output is generated.
(2)
The most recently received signal will be reproduced if other DATA (reproduction command) is received during reproducing memory.
(3)
If Input of SEAT MANUAL switch is operated during reproducing seat position, the activation should be completely stopped.
(4)
If ERROR occurs during operating SEAT, memory of related motor will clear.
5.
Motor Driving Control
(1)
To prevent inrush current from being duplicated during driving motor, automated control of driving motor will defer driving time for 100ms each, and the priority is as follows. SLIDE > RECLINE > Front rear height > rear right height
(2)
Driving motor is executed in the following order, in case of reproduction process, and DELAY TIME among each motor is as follows.

TIME value of each continuous driving motor (excluding operation by MANUAL switch)
SLIDE: 20 seconds, RECLINE: 35 seconds, Front rear height: 10 seconds, rear right height: 15 seconds
(3)
Motor Driving Control of Reverse Direction
If motor driving requires being in reverse direction during operating easy access function or reproduction process, driving in current direction is immediately stopped, and driving in the reverse direction will be operated following 100ms.
(4)
If distance difference between stored position on reproduction and current position is under the rated measurement, motor is not operating regardless of receiving reproduction DATA. * SLIDE, RECLINE, Front rear height, rear right HEIGHT: 12EDGE (6PULSE)
(5)
Operation is stopped in reaching target position of motor, when operating easy access function or reproduction process.
Easy access functionEasy access function
(user option - default : Operating easy access function)
1.
If “SET” switch is pressed over 6 seconds, Easy access function can be set/cancelled by AUTO_SET. (2 Buzzer Outputs when setting / 1 Buzzer Output when canceling)
2.
If Signal “BCM KEY IN” transmitted from BCM and signal “LOCAL KEY IN” in case that key is removed are changed from “LOW”(KEY IN) → “HIGH” (KEY OFF), KEY IN→OUT & DRIVER DOOR OPEN SEAT SLIDE is moved 50mm backward from KEY OUT position.
3.
Signal “BCM KEY IN” transmitted from BCM or signal “LOCAL KEY IN” is changed from “HIGH” ( KEY OFF) → “LOW” ( KEY IN ) by inserting KEY, it is moved to KEY OUT position.
4.
Prohibiting and Stopping easy access operation.The following requirements are determined and controlled by IMS. If one of the following conditions is met during anti-operation or operation process, it is stopped.
(1)
“P”Position switch is not ON
(If "P” Position switch is OFF during operating, the operation is completed.)
(2)
Vehicle data “SPEED” transmitted from BCM is LOW ( More than 3km/h )
(3)
MANUAL switch of SEAT is in operation
(4)
Reproduction command is received during easy access operation
(5)
“AUTO_SET” DATA transmitted from IMS switch has “ OFF” value.
(If “AUTO_SET” is changed during operating, the operation is completed.)
(6)
SET message transmitted from IMS switch is “1” during easy access operation
5.
If control is stopped during moving backward, the backward action is paused without moving further. When returning, it moves just as much the distance as it previously moved backwards.
6.
MANUAL switch Input is operated during or after moving backward, it will move to KEY OUT position on easy access operated by KEY IN.
7.
Condition to Restore Memory of riding position in a vehicle
(1)
MANUAL switch is operated in the level above Key IN
(2)
Reproducing memory is in operation

LIMIT Setting
1.
LIMIT position is randomly set as following since there is no SLIDE, RECLINE, rear right height, and Front rear height LIMIT switch.
(1)
Control is immediately stopped, and the location in front of 6 pulse is set Driving LIMIT position, if more than 6PULSE is not generated for 2 seconds during initial operation by MANUAL switch or by easy access function after inserting battery.
(LIMIT position in reverse direction is the same as above.)
However, LIMIT position for Front rear height and rear right height is set if more than 6PULSE is not generated for a second.
(2)
If virtual LIMIT is set, MEMORY Reproduction is not operated off the LIMIT boundary for preventing motor damage by mechanical LOCK
(3)
If PULSE is correctly input away from the LIMIT boundary by MANUAL operation or by Easy access function with the previously set LIMIT applied, LIMIT position is renewed
Detecting and Controlling ERROR
1.
Detecting seat ERROR
ERROR is controlled if the following situation occurs during easy access operation, reproduction process and operating MANUAL switch of each motor.
(1)
ERROR resulted from PULSE is not input

Related motor output is stopped if ERROR is detected during reproduction and easy access operation
Related motor output is stopped, if ERROR is found in MANUAL operation.
(2)
Sensor Vcc of Seat is detected as much as 40ms from less than 1V. => Return if Sensor Vcc of Seat is over 7V.
If SEAT Sensor Vcc ERROR is detected during reproduction and easy access operation, all operating SEAT motor is stopped. (BUZZER output is not operated.)
2.
ERROR Control
If ERROR is detected as shown above, it is considered to be caused by broken HARNESS or Sensor malfunctioning, and is controlled as following.
BUZZER output is operated during receiving storage and reproduction command regardless of ERROR occurrence
Paused easy access operation and memory reproduction is available to be re-activated from operating MEMORY command after motor malfunctioning is repaired, and it is as following.
(When SLIDE motor is repaired from Sensor ERROR, Easy access function is available)
SEAT: 6PULSE is correctly input from ERROR causing motor position Sensor by operating MANUAL switch with in 2 seconds (SLIDE, RECLINE)/ 1 second(Front rear height, Rear right height).
Determining Seat Position
Seat position is relatively determined rather than by absolute position.
Schematic diagrams
Circuit Diagram Input/Output Specification Connector Pin Lay Out IMS input/output pin information   No Signal Name ...

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