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Some Motors Do Not Operate. (With Memory)

  1. CHECK OPERATION  .

    Check the slide motor rotation while moving the switch to slide forward and slide backward.

    Does the motor operate at least 1 second when the switch is operated?

    • Yes: Go to 2  .
    • No: Encoder defection. Replace the seat cushion frame assembly.
  2. CHECK SWITCH  .
    1. Disconnect the power seat switch connector.
    2. Measure the resistance between connector terminals when moving the switch to slide forward and slide backward. Ref. to SEATS>Power Seat System>INSPECTION>CHECK POWER SEAT SWITCH .

    Is the inspection result normal?

    • Yes: Go to 3  .
    • No: Replace the power seat switch assembly.
  3. CHECK HARNESS  .
    1. Disconnect the power seat control module connector.
    2. Measure the resistance between the power seat control module connector and power seat switch connector.

      Connector & terminal 

      (R155) No. 7 - (R190) No. 13:

      (R155) No. 6 - (R190) No. 14:

    Is the resistance less than 10 Ω?

    • Yes: Go to 4  .
    • No: Check power seat harness.
  4. CHECK HARNESS  .
    1. Disconnect the slide motor connector.
    2. Measure the resistance between power seat control module connector and slide motor.

      Connector & terminal 

      (R156) No. 15 - (R202) No. 1:

      (R156) No. 16 - (R202) No. 5:

    Is the resistance less than 10 Ω?

    • Yes: Go to 5  .
    • No: Check power seat harness.
  5. CHECK SLIDE MOTOR  .
    1. Connect the slide motor connector.
    2. Apply battery voltage to the power seat control module connector and check the motor rotation.

      Connector & terminal 

      (R156) No. 15 (+) - (R156) No. 16 (-):

      (R156) No. 16 (+) - (R156) No. 15 (-):

    Does the motor rotate normally?

    • Yes: Replace the power seat control module.
    • No: Slide motor problem. Replace the seat cushion frame assembly.
  6. Malfunction of tilt operation 
    1. CHECK OPERATION  .

      Check the tilt motor rotation while moving the switch to tilt up and tilt down.

      Does the motor operate at least 1 second when the switch is operated?

      • Yes: Go to 2  .
      • No: Encoder defection. Replace the seat cushion frame assembly.
    2. CHECK SWITCH  .
      1. Disconnect the power seat switch connector.
      2. Measure the resistance between connector terminals when moving the switch to tilt up and tilt down. Ref. to SEATS>Power Seat System>INSPECTION>CHECK POWER SEAT SWITCH .

      Is the inspection result normal?

      • Yes: Go to 3  .
      • No: Replace the power seat switch assembly.
    3. CHECK HARNESS  .
      1. Disconnect the power seat control module connector.
      2. Measure the resistance between the power seat control module connector and power seat switch connector.

        Connector & terminal 

        (R155) No. 3 - (R190) No. 5:

        (R155) No. 2 - (R190) No. 6:

      Is the resistance less than 10 Ω?

      • Yes: Go to 4  .
      • No: Check power seat harness.
    4. CHECK HARNESS  .
      1. Disconnect the tilt motor connector.
      2. Measure the resistance between power seat control module connector and tilt motor.

        Connector & terminal 

        (R156) No. 5 - (R203) No. 6:

        (R156) No. 4 - (R203) No. 4:

      Is the resistance less than 10 Ω?

      • Yes: Go to 5  .
      • No: Check power seat harness.
    5. CHECK TILT MOTOR  .
      1. Connect the tilt motor connector.
      2. Apply battery voltage to the power seat control module connector and check the motor rotation.

        Connector & terminal 

        (R156) No. 5 (+) - (R156) No. 4 (-):

        (R156) No. 4 (+) - (R156) No. 5 (-):

      Does the motor rotate normally?

      • Yes: Check for temporary poor contact or mechanical trouble in tilt mechanism.
      • No: Tilt motor problem. Replace the seat cushion frame assembly.
  7. Malfunction of lifter operation
    1. CHECK OPERATION  .

      Check the lifter motor rotation while turning the switch to lifter up and lifter down.

      Does the motor operate at least 1 second when the switch is operated?

      • Yes: Go to 2  .
      • No: Encoder defection. Replace the seat cushion frame assembly.
    2. CHECK SWITCH  .
      1. Disconnect the power seat switch connector.
      2. Measure the resistance between connector terminals when moving the switch to lifter up and lifter down. Ref. to SEATS>Power Seat System>INSPECTION>CHECK POWER SEAT SWITCH .

      Is the inspection result normal?

      • Yes: Go to 3  .
      • No: Replace the power seat switch assembly.
    3. CHECK HARNESS  .
      1. Disconnect the power seat control module connector.
      2. Measure the resistance between the power seat control module connector and power seat switch connector.

        Connector & terminal 

        (R155) No. 5 - (R190) No. 2:

        (R155) No. 4 - (R190) No. 1:

      Is the resistance less than 10 Ω?

      • Yes: Go to 4  .
      • No: Check power seat harness.
    4. CHECK HARNESS  .
      1. Disconnect the lifter motor connector.
      2. Measure the resistance between power seat control module connector and lifter motor.

        Connector & terminal 

        (R156) No. 2 - (R204) No. 4:

        (R156) No. 1 - (R204) No. 6:

      Is the resistance less than 10 Ω?

      • Yes: Go to 5  .
      • No: Check power seat harness.
    5. CHECK LIFTER MOTOR  .
      1. Connect the lifter motor connector.
      2. Apply battery voltage to the power seat control module connector and check the motor rotation.

        Connector & terminal 

        (R156) No. 2 (+) - (R156) No. 1 (-):

        (R156) No. 1 (+) - (R156) No. 2 (-):

      Does the motor rotate normally?

      • Yes: Check for temporary poor contact or mechanical trouble in lifter mechanism.
      • No: Lifter motor problem. Replace the seat cushion frame assembly.
  8. Malfunction of reclining operation 
    1. CHECK OPERATION  .

      Check the reclining motor rotation while moving the switch to reclining forward and reclining backward.

      Does the motor operate at least 1 second when the switch is operated?

      • Yes: Go to 2  .
      • No: Encoder defection. Replace the backrest frame assembly.
    2. CHECK SWITCH  .
      1. Disconnect the power seat switch connector.
      2. Measure the resistance between connector terminals when moving the switch to reclining forward and reclining backward. Ref. to SEATS>Power Seat System>INSPECTION>CHECK POWER SEAT SWITCH .

      Is the inspection result normal?

      • Yes: Go to 3  .
      • No: Replace the power seat switch assembly.
    3. CHECK HARNESS  .
      1. Disconnect the power seat control module connector.
      2. Measure the resistance between the power seat control module connector and power seat switch connector.

        Connector & terminal 

        (R155) No. 9 - (R190) No. 4:

        (R155) No. 8 - (R190) No. 3:

      Is the resistance less than 10 Ω?

      • Yes: Go to 4  .
      • No: Check power seat harness.
    4. CHECK HARNESS  .
      1. Disconnect the reclining motor connector.
      2. Measure the resistance between power seat control module connector and reclining motor.

        Connector & terminal 

        (R156) No. 7 - (R201) No. 4:

        (R156) No. 6 - (R201) No. 6:

      Is the resistance less than 10 Ω?

      • Yes: Go to 5  .
      • No: Check power seat harness.
    5. CHECK RECLINING MOTOR  .
      1. Connect the reclining motor connector.
      2. Apply battery voltage to the power seat control module connector and check the motor rotation.

        Connector & terminal 

        (R156) No. 7 (+) - (R156) No. 6 (-):

        (R156) No. 6 (+) - (R156) No. 7 (-):

      Does the motor rotate normally?

      • Yes: Check for temporary poor contact or mechanical trouble in reclining hinge.
      • No: Reclining motor problem. Replace the backrest frame assembly.
    • Malfunction of lumbar operation 
      1. CHECK SWITCH  .
        1. Disconnect the lumbar switch connector.
        2. Measure the resistance between connector terminals when moving the switch to lumbar forward and lumbar backward. Ref. to SEATS>Power Seat System>INSPECTION>CHECK LUMBAR SWITCH .

        Is the inspection result normal?

        • Yes: Go to 2  .
        • No: Replace the lumbar switch assembly.
      2. CHECK HARNESS  .
        1. Disconnect the lumbar motor connector.
        2. Measure the resistance between lumbar switch connector and lumbar motor connector.

          Connector & terminal 

          (R199) No. 1 - (R198) No. 2:

          (R199) No. 2 - (R198) No. 1:

        Is the resistance less than 10 Ω?

        • Yes: Go to 3  .
        • No: Check power seat harness.
      3. CHECK LUMBAR MOTOR  .
        1. Connect the lumbar motor connector.
        2. Apply battery voltage to the lumbar motor and check the motor rotation.

          Connector & terminal 

          (R199) No. 1 (+) - (R199) No. 2 (-):

          (R199) No. 2 (+) - (R199) No. 1 (-):

          Does the motor rotate normally?

          • Yes: Check for temporary poor contact or mechanical trouble in lumbar mechanism.
          • No: Lumbar motor problem. Replace the backrest frame assembly.
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