Operation Check
SEAT: FRONT POWER SEAT CONTROL SYSTEM (w/ Memory): OPERATION CHECK
1. CHECK POWER SEAT FUNCTION
(a) Check the basic functions.
(1) Operate the switches of the position control ECU and switch assembly and check to make sure that each seat function works:
* Sliding function*1
* Front vertical function*2
* Lifter function*3
* Reclining function*4
* Lumbar support function*5
2. CHECK POWER SEAT MOTOR ASSEMBLY (SLIDING, FRONT VERTICAL, LIFTER AND RECLINING FUNCTIONS)
(a) Check the PTC operation inside the power seat motor.
HINT
The resistance of the PTC thermistor increases when a switch of the position control ECU and switch assembly is held down even after the seat has been moved to the farthest possible position in one direction. If the resistance increases beyond a specified level, the current is shut off to prevent a short circuit.
NOTICE:
* The inspection should be performed with the seat installed in the vehicle.
* Perform the 4 steps below to check the full range of motion for each power seat function.
(1) Choose a power seat function. Operate a switch of the position control ECU and switch assembly and move the seat to the farthest possible position in one direction. Keep the seat in that position for approximately 60 seconds.
(2) Operate the switch of the position control ECU and switch assembly again and continue to try to move the seat in the same direction as in the previous step. Measure the time until the current is shut off (motor operation sound will stop).
Standard:
4 to 90 seconds
(3) After the current is shut off, release the switch of the position control ECU and switch assembly and wait for approximately 60 seconds.
(4) Operate the same switch of the position control ECU and switch assembly and move the seat in the opposite direction. Check that the motor operates.
3. CHECK LUMBAR SUPPORT ADJUSTER ASSEMBLY
(a) Check the PTC operation inside the power seat motor.
HINT
The inspection should be performed with the seat installed in the vehicle.
(1) Operate the lumbar switch and move the lumbar support to either the foremost or rearmost position. Keep the seat in that position for approximately 60 seconds.
(2) Operate the lumbar switch again and continue to try to move the lumbar support in the same direction as in the previous step. Measure the time until the current is shut off (motor operation sound will stop).
Standard:
4 to 90 seconds
(3) After the current is shut off, release the lumbar switch and wait for approximately 60 seconds.
(4) Operate the lumbar switch and move the seat in the opposite direction. Check that the motor operates.
4. CHECK MEMORY AND SEAT RESTORING OPERATION
Text in Illustration
(a) Turn the engine switch on (IG).
(b) Check that the shift lever is in P (for AT).
(c) Set the parking brake (for MT).
(d) Move the seat to the maximum front and upper positions using the position control ECU and switch assembly.
(e) Check that the buzzer sounds for 0.5 seconds and the seat position is memorized when the M1 switch is pressed within 3 seconds after the SET switch is being pressed.
(f) Move the seat out of the maximum front and upper positions using the position control ECU and switch assembly.
(g) Check that the buzzer sounds for 0.5 seconds and the seat position is memorized when the M2 switch is pressed within 3 seconds after the SET switch is being pressed.
(h) Move the seat to the maximum rear and down positions using the position control ECU and switch assembly.
(i) Check that the buzzer sounds for 0.5 seconds and the seat position is memorized when the M3 switch is pressed within 3 seconds after the SET switch is being pressed.
(j) Check that the buzzer sounds for 0.1 seconds and the seat automatically moves into the maximum front and upper positions (memorized positions) when the M1 switch is pressed.
(k) Check that the buzzer sounds for 0.1 seconds and the seat automatically moves out of the maximum front and upper positions (memorized positions) when the M2 switch is pressed.
(l) Check that the buzzer sounds for 0.1 seconds and the seat automatically moves into the maximum rear and down positions (memorized positions) when the M3 switch is pressed.
HINT
* The seat position will be stored when the M3 switch is pressed while the SET switch is being pressed.
* The seat position will not be stored when the SET switch and M2 switch are pressed simultaneously.
* The seat position will not be stored if the SET switch and 2 or more of the seat memory switches (for example, M1 switch and M2 switch) are pressed simultaneously.
* If a memorizing operation has failed, release all switches. The seat memory function does not operate unless the switches are released.
* Seat positions cannot be memorized while the seat is returning to a memorized position.
* Seat positions cannot be memorized while the position control ECU and switch assembly is being operated.
* Seat positions cannot be memorized while the fold or return function is operating.
5. CHECK MEMORY AND SEAT RESTORING OPERATION WHEN ENGINE SWITCH IS OFF
(a) Turn the engine switch off and open the driver door. Check that the buzzer sounds for 0.1 seconds and the seat automatically moves to the memorized position by pressing the M1, M2 or M3 switch within 180 seconds after the engine switch is turned off.
(b) Turn the engine switch off and close the driver door. Check that the buzzer sounds for 0.1 seconds and the seat automatically moves to the memorized position by pressing the M1, M2 or M3 switch within 60 seconds after the engine switch is turned off.
6. CHECK MEMORY CALL FUNCTION
(a) Automatic memory call function check
(1) With a transmitter key recognition code registered:
Perform a wireless door unlock operation and check that opening the driver side door causes the following:
* The buzzer sounds for 0.1 seconds.
* The front seat, the steering wheel (tilt & telescopic) and outer mirror surface position automatically move to their stored positions.
HINT
* The registered transmitter key recognition code is recalled automatically.
* If the automatic memory call function is not operated, the buzzer will not sound.
(b) Memory registration (except card type key)
(1) With the engine switch off and the driver side door closed, press and hold the M1, M2 or M3 switch. The position control ECU and switch assembly will enter transmitter key recognition code registration mode to allow a key to be linked to seat position memory.
HINT
If the memory switch is released before entering registration mode, the memory switch will not enter registration mode.
(2) When the manual LOCK or UNLOCK switch is pressed, check that the buzzer of the position control ECU and switch assembly sounds once (0.5 seconds).
(c) Memory registration (for card type key)
(1) With the engine switch off and the driver side door closed, press and hold the M1, M2 or M3 switch while carrying the card key. The position control ECU and switch assembly will enter transmitter key recognition code registration mode to allow a key to be linked to seat position memory.
HINT
If the memory switch is released before entering registration mode, the memory switch will not enter registration mode.
(2) When the manual door lock switch is pressed, check that the buzzer of the position control ECU and switch assembly sounds once (0.5 seconds).
(d) Memory deletion (except card key type)
(1) With the engine switch off and the driver side door closed, press and hold the SET switch. The position control ECU and switch assembly will enter transmitter key recognition code deletion mode.
HINT
If the memory switch is released before entering deletion mode, the memory switch will not enter deletion mode.
(2) When the manual LOCK or UNLOCK switch is pressed, check that the buzzer of the position control ECU and switch assembly sounds twice (0.1 seconds each time).
(e) Memory deletion (for card type key)
(1) With the engine switch off and the driver side door closed, press and hold the SET switch while carrying the card key. The main body ECU (multiplex network body ECU) will enter transmitter key recognition code deletion mode.
HINT
If the memory switch is released before entering deletion mode, the memory switch will not enter deletion mode.
(2) When the manual door lock switch is pressed, check that the buzzer of the position control ECU and switch assembly sounds twice (0.1 seconds each time).
7. MEMORY CALL EMERGENCY STOP FUNCTION
(a) While a memory call function is operating, check that performing one of the following will stop the memory call operation:
(1) The engine switch is turned on (IG) and the parking brake is released or the vehicle is driven at 4 km/h while the seat is returning to a memorized position.
(2) The SET switch, M1 switch, M2 switch or M3 switch is operated while the seat is returning to a memorized position.
(3) The position control ECU and switch assembly is operated while the seat is returning to a memorized position.
(4) A short is detected in a position sensor power source circuit while the seat is returning to a memorized position.
(5) A locked motor is detected while the seat is returning to a memorized position.
8. CLEAR SEAT POSITION MEMORY
If the seat adjuster assembly has been replaced or voltage has been directly applied to a motor, it is necessary to store end points after clearing the seat position memory.
(a) Turn the engine switch on (IG).
(b) Operate the front vertical function of the power seat switch to tilt the seat down 3 times.
(c) Within 10 seconds after operating the front vertical function of the power seat switch, operate the lifter function of the power seat switch to tilt up and the reclining function of the power seat switch to recline the seat simultaneously, and hold both switches for 10 seconds. The buzzer sounds for 0.5 seconds when the memory is cleared.
NOTICE:
If the seat position memory is cleared, the following memory will then be cleared: seat positions, end points for each motor, lock detection positions for each motor and current seat positions.
9. STORE END POINTS
In order to prevent the headrests and roof from interfering with each other as well as the seatbacks and rear seats, it is necessary to store both end points of the sliding, reclining and lifting operations.
(a) When the end points are not memorized:
HINT
* The position control ECU and switch assembly has been replaced with a new one.
* The seat position memory has been cleared.
(1) Turn the engine switch on (IG).
(2) Operate the position control ECU and switch assembly to slide the seat forward or rearward until the seat stops.
(3) Check that the buzzer sounds for 0.2 seconds after the seat stops moving.
HINT
The end point on the other side will be calculated and registered by the position control ECU and switch assembly.
(4) Operate the position control ECU and switch assembly to recline the seat to the rearmost position or the foremost position until the seat stops.
(5) Check that the buzzer sounds for 0.2 seconds after the seat stops moving.
HINT
The end point on the other side will be calculated and registered by the position control ECU and switch assembly.
(6) Operate the position control ECU and switch assembly to lift the seat to the lowermost or uppermost position until the seat stops.
(7) Check that the buzzer sounds for 0.5 seconds after the seat stops moving.
HINT
The end point on the other side will be calculated and registered by the position control ECU and switch assembly.
(b) When end points are already registered:
(1) If the end points have already been registered, they will be updated when the seat stops moving and the motor locks without sounding the buzzer.
10. CHECK FOLD & RETURN FUNCTION
NOTICE:
If the end points detected by the position sensors are not registered, the fold & return functions will not operate properly. It is necessary to store end points after the end point memory is cleared in the following situations:
* The position control ECU and switch assembly has been replaced with a new one.
* The front seat adjuster assembly has been replaced.
* Voltage has been directly applied to a motor.
(a) Seat fold operation for driver seat.
(1) Check that the following preconditions are met:
* The engine switch is off.
* The shift lever is in P. (for AT)
* The parking brake is applied and the vehicle is stopped.
* Each power seat switch and the seat memory switch of the driver seat are off.
* None of the power seat motors of the driver seat is in operation.
* The driver seat is not occupied.
* The driver side seat belt tongue plate is disengaged from the buckle.
* Stored end points
(2) Press the fold switch of the fold & return switch.
(3) Check that the buzzer sounds for 0.1 seconds and the seat automatically slides to a position 55 mm rearward from the foremost position, reclines to the foremost position, and moves to the lowest position.
HINT
* If any of the preconditions is no longer met during the fold operation, it will be stopped.
* If the fold switch of the fold & return switch is pressed and all preconditions are not met, the buzzer sounds twice at a 0.1-second interval and does not start fold operation.
(4) After the fold operation is completed, check that the seat slides to the foremost position when holding the fold switch of the fold & return switch.
(b) Seat fold operation for passenger seat.
(1) Check that the following preconditions are met:
* Each power seat switch and the seat memory switch of the passenger seat are off.
* None of the power seat motors of the front passenger seat is in operation.
* The front passenger seat is not occupied.
* The front passenger side seat belt tongue plate is disengaged from the buckle.
* Stored end points
(2) Press the fold switch of the fold & return switch.
(3) Check that the buzzer sounds for 0.1 seconds and the seat automatically slides to a position 55 mm rearward from the foremost position, reclines to the foremost position, and moves to the lowest position.
HINT
* If any of the preconditions is no longer met during the fold operation, it will be stopped.
* If the fold switch of the fold & return switch is pressed and all preconditions are not met, the buzzer sounds twice at a 0.1-second interval and does not start fold operation.
(4) After the fold operation is completed, check that the seat slides to the foremost position when holding the fold switch of the fold & return switch.
(c) Seat return operation for driver seat.
(1) Check that the following preconditions are met:
* The engine switch is off.
* The shift lever is in P. (for AT)
* The parking brake is applied and the vehicle is stopped.
* Each power seat switch and the seat memory switch of the driver seat are off.
* None of the power seat motors of the driver seat is in operation.
* The driver seat is not occupied.
* The driver side seat belt tongue plate is disengaged from the buckle.
(2) Press the return switch of the fold & return switch.
(3) Check that the buzzer sounds for 0.1 seconds and the seat automatically slides to a position 120 mm rearward from the foremost position and reclines 29° back from the foremost position (Auto operation).
(4) Check that the seat returns to the same position it was in before the fold operation was started by holding the return switch of the fold & return switch after the return operation is completed (Auto operation).
(5) Check that the buzzer sounds for 0.1 seconds and the seat slides reward only while the fold & return switch is being pressed (Manual return operation)*.
* *: Customize setting for "AUTO" is OFF (multi information display)
HINT
* The seat will not rise from the lowermost position.
* If any of the preconditions is no longer met during the return operation, it will be stopped.
* If the position control ECU and switch assembly is operated after the fold operation stops, the return operation will not operate.
* If the return switch of the fold & return switch is pressed and all preconditions are not met, the buzzer sounds twice at a 0.1-second interval and does not start return operation.
(d) Seat return operation for front passenger seat.
(1) Check that the following preconditions are met:
* All of the power seat switches and the seat memory switches of the front passenger seat are off.
* None of the power seat motors of the front passenger seat is in operation.
* The passenger seat is not occupied.
* The passenger side seat belt tongue plate is disengaged from the buckle.
* Stored end points
(2) Press the return switch of the fold & return switch.
(3) Check that the buzzer sounds for 0.1 seconds and the seat automatically slides to a position 120 mm rearward from the foremost position and reclines 29° back from the foremost position.
(4) Check that the seat returns to the same position it was in before the fold operation was started by holding the return switch of the fold & return switch after the return operation is completed (Auto operation).
(5) Check that the buzzer sounds for 0.1 seconds and the seat slides reward only while the fold & return switch is being pressed (Manual return operation)*.
* *: Customize setting for "AUTO" is OFF (multi information display)
HINT
* The seat will not rise from the lowermost position.
* If any of the preconditions is no longer met during the return operation, it will be stopped.
* If the position control ECU and switch assembly is operated after the fold operation stops, the return operation will not operate.
* If the return switch of the fold & return switch is pressed and all preconditions are not met, the buzzer sounds twice at a 0.1-second interval and does not start return operation.