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

  1. CHECK FRONT POWER SEAT FUNCTION

    1. B339799C01

      Check the basic functions.

      Table 1. Function Name

      *1

      Sliding function

      *2

      Reclining function

      *3

      Lifter function

      *4

      Front vertical function

      *5

      Lumbar support function

      1. Operate the power seat switches and check to make sure each seat function works:

        • Sliding

        • Front vertical

        • Lifter

        • Reclining

        • Lumbar support

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

    1. Check the PTC thermistor operation inside the power seat motor.

      Note:

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

      • Perform the 4 steps below for each power seat function.

      Tip:

      The PTC thermistor resistance increases when the power seat switch is held down even after the power seat has been moved to the maximum in one direction. If the resistance increases beyond a specified level, current is cut to prevent a short circuit.

      1. Choose a power seat function. Operate the power seat switch and move the seat as much as possible in one direction. Keep the seat in that position for approximately 60 seconds.

      2. Operate the power seat switch again and continue to try to move the seat in the same direction as in the previous step. Measure the amount of time elapsed before current is automatically cut (the sound of the motor stops).

        Standard

        4 to 90 seconds

      3. After current has been cut, release the power seat switch and wait for approximately 60 seconds.

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

  3. CHECK LUMBAR SUPPORT ADJUSTER ASSEMBLY

    1. Check the PTC thermistor operation inside the lumbar support adjuster.

      Note:

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

      1. Operate the lumbar support switch 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 lumbar support 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 (adjuster operation sound stops).

        Standard

        4 to 90 seconds

      3. After the current is shut off, release the lumbar support switch and wait for approximately 60 seconds.

      4. Operate the lumbar support switch and move the lumbar support in the opposite direction. Check that the motor operates.