Front Power Seat Control System (w/o Memory)

SEAT: FRONT POWER SEAT CONTROL SYSTEM (w/o Memory): OPERATION CHECK

1. CHECK FRONT POWER SEAT FUNCTION

(a) Check the basic functions.





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(1) Operate the power seat switches and check to make sure each seat function operates properly:

Sliding

Front vertical

Lifter

Reclining

Lumbar support

2. CHECK POWER SEAT MOTOR ASSEMBLY (SLIDING, FRONT VERTICAL, LIFTER, RECLINING)

(a) Check the PTC thermistor operation inside the power seat motor.

HINT
The resistance of the PTC thermistor increases when the front power seat switch is held down even after the power 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:
* Make sure the inspection is performed with the seat installed in the vehicle.
* Perform the 4 steps below for each power seat function.

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

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

3. CHECK LUMBAR SUPPORT MOTOR

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

NOTICE:
Make sure the inspection is performed with the seat installed in the vehicle.

(1) Operate the power seat switch assembly and move the lumbar support to either the foremost or rearmost position. Keep the lumbar support in that position for approximately 60 seconds.

(2) Operate the power seat switch assembly again and continue to try to move the lumbar support in the same direction as in the previous step. Measure the time until current is shut off (motor operation sound will stop).

Standard:

4 to 90 seconds

(3) After current is shut off, release the power seat switch assembly and wait for approximately 60 seconds.

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