Lexus NX: Operation Check

OPERATION CHECK

CHECK POWER SEAT FUNCTION

(a) Check the basic functions.

(1) Operate the power seat switches and check that the following seat functions operate properly:

CHECK POWER SEAT MOTOR (SLIDING, FRONT VERTICAL, REAR 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 front power seat switch LH 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.

(1) Choose a power seat function. Operate a switch of the front power seat switch LH 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 front power seat switch LH 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 front power seat switch LH and wait for approximately 60 seconds.

(4) Operate the same switch of the front power seat switch LH and move the seat in the opposite direction. Check that the motor operates.

CHECK LUMBAR SUPPORT ADJUSTMENT MOTOR

(a) Check the PTC operation inside the lumbar support adjustment motor.

NOTICE:

The inspection should be performed with the seat installed in the vehicle.

(1) Operate the front lumbar power seat 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 front lumbar power seat 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 front lumbar power seat switch and wait for approximately 60 seconds.

(4) Operate the front lumbar power seat switch and move the lumbar support in the opposite direction. Check that the motor operates.

CHECK POWER SEAT POWER EASY ACCESS SYSTEM

HINT:

When troubleshooting a function, first make sure that the function is set to the default setting.

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(a) Check that the seat slides backward when either of the following conditions is met:

(b) Check that the seat slides forward when either of the following conditions is met:

CHECK SEAT POSITION MEMORY AND RESTORING FUNCTION

(a) Turn the power switch on (IG) and check that the P position indicator is on.

(b) Move the seat to the foremost and uppermost positions using the front power seat switch LH.

(c) Check that the buzzer sounds for 0.5 seconds and the seat position is memorized when the M1 switch is pressed within 3 seconds of the SET switch being pressed or the M1 switch is pressed while the SET switch is being pressed.

(d) Move the seat out of the foremost and uppermost positions using the front power seat switch LH.

(e) Check that the buzzer sounds for 0.5 seconds and the seat position is memorized when the M2 switch is pressed within 3 seconds of the SET switch being pressed or the M2 switch is pressed while the SET switch is being pressed.

(f) Move the seat to the rearmost and lowermost positions using the front power seat switch LH.

(g) Check that the buzzer sounds for 0.5 seconds and the seat position is memorized when the M3 switch is pressed within 3 seconds of the SET switch being pressed or the M3 switch is pressed while the SET switch is being pressed.

(h) Check that the buzzer sounds for 0.1 seconds and the seat automatically moves into the foremost and uppermost positions (memorized positions) when the M1 switch is pressed.

(i) Check that the buzzer sounds for 0.1 seconds and the seat automatically moves out of the foremost and uppermost positions (memorized positions) when the M2 switch is pressed.

(j) Check that the buzzer sounds for 0.1 seconds and the seat automatically moves into the rearmost and lowermost positions (memorized positions) when the M3 switch is pressed.

(k) Turn the power 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 power switch is turned off.

(l) Turn the power 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 power switch is turned off.

(m) Operate the front vertical function of the front power seat switch LH to tilt the seat down 3 times.

Within 10 seconds after operating the front vertical function of the front power seat switch LH, operate the lifter function of the front power seat switch LH to tilt up and the reclining function of the front power seat switch LH to recline the seat simultaneously. Hold both switches for 10 seconds.

HINT:

The buzzer sounds for 0.5 seconds when the memory is cleared.

CHECK MEMORY CALL FUNCTION

(a) Memory registration

(1) Register the seat position to a seat memory switch (M1, M2, or M3 switch) in advance.

(2) Sit on the driver seat carrying only the electrical key transmitter sub-assembly to be registered to the vehicle.

(3) With the power switch on (IG) and the shift lever in P, restore the memorized position to be registered.

(4) With the power switch on (IG), the shift lever in P, the driver door closed, and a seat memory switch (M1, M2, or M3 switch) being pressed and held, press and hold the door control switch on the multiplex network master switch assembly until the buzzer answer-back function operates.

(b) Automatic memory call function

(1) With the identification code of the electrical key transmitter sub-assembly registered and the entry unlock function operated or wireless door unlock operation performed, check that the buzzer sounds for 0.1 seconds and the seat automatically moves to the memorized position when the driver door is opened.

HINT:

When the customize function "Seat Move Distance" is set to "Standard", the seat slides backward to a position 50 mm (1.97 in.) from the memorized position.

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(c) Memory deletion

(1) Sit on the driver seat carrying only the electrical key transmitter sub-assembly to be deleted from the vehicle.

(2) With the power switch on (IG), the shift lever in P, the driver door closed, and the SET seat memory switch being pressed and held, press and hold the door control switch on the multiplex network master switch assembly until the answerback by the buzzer is confirmed.

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) press the SET switch, M1 switch, M2 switch or M3 switch or 2) press the front power seat switch LH.

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