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FRONT POWER SEAT CONTROL SYSTEM(w/ Memory) One or more Power Seat Motors do not Operate

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DTC Code DTC Name
  One or more Power Seat Motors do not Operate
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DESCRIPTION

Signals are input into the position control ECU assembly. The built-in ECU manages the signals received from the position control ECU assembly and operates each motor. If the position control ECU assembly receives 2 or more operation signals for the same motor, the motor will be stopped. Manual operation resumes when the position control ECU assembly receives only 1 signal.

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WIRING DIAGRAM


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  1. B0071Q8E03
    B006YLAE01
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CAUTION / NOTICE / HINT

Note:

Inspect the fuses for circuits related to this system before performing the following procedure.

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PROCEDURE


  1. Click here

    CHECK FRONT POWER SEAT OPERATION


    1. Check that each function of the power seat operates normally by using the front power seat switch (driver seat).

      Click here

      Result
      Result Proceed to
      One or more power seat functions do not operate A
      All power seat functions do not operate B

    • AClick here
    • B

      GO TO OTHER DIAGNOSIS PROCEDURE (Front Power Seat does not Operate with Front Power Seat Switch)Click here

  2. Click here

    READ VALUE USING GTS (POWER SEAT SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Driver Seat / Data List.

    5. Read the Data List according to the display on the GTS.


      1. Body Electrical > Driver Seat > Data List
        Tester Display Measurement Item Range Normal Condition Diagnostic Note
        Reclining Rear Reclining switch signal (Rearward) ON or OFF

        ON: Reclining switch (Rearward) on

        OFF: Reclining switch (Rearward) off

        		 -
        Reclining Front Reclining switch signal (Forward) ON or OFF

        ON: Reclining switch (Forward) on

        OFF: Reclining switch (Forward) off

        		 -
        Front Vertical Down Front vertical switch signal (Downward) ON or OFF

        ON: Front vertical switch (Downward) on

        OFF: Front vertical switch (Downward) off

        		 -
        Front Vertical Up Front vertical switch signal (Upward) ON or OFF

        ON: Front vertical switch (Upward) on

        OFF: Front vertical switch (Upward) off

        		 -
        Lifter Switch Down Lifter switch signal (Downward) ON or OFF

        ON: Lifter switch (Downward) on

        OFF: Lifter switch (Downward) off

        		 -
        Lifter Switch Up Lifter switch signal (Upward) ON or OFF

        ON: Lifter switch (Upward) on

        OFF: Lifter switch (Upward) off

        		 -
        Slide Rear Slide switch signal (Rearward) ON or OFF

        ON: Slide switch (Rearward) on

        OFF: Slide switch (Rearward) off

        		 -
        Slide Front Slide switch signal (Forward) ON or OFF

        ON: Slide switch (Forward) on

        OFF: Slide switch (Forward) off

        		 -
        Lumbar Switch Front Lumbar support adjuster switch signal (Forward) ON or OFF

        ON: Lumbar support adjuster switch (Forward) on

        OFF: Lumbar support adjuster switch (Forward) off

        		 -
        Lumbar Switch Rear Lumbar support adjuster switch signal (Rearward) ON or OFF

        ON: Lumbar support adjuster switch (Rearward) on

        OFF: Lumbar support adjuster switch (Rearward) off

        		 -












      1. Body Electrical > Driver Seat > Data List
        Tester Display
        Reclining Rear
        Reclining Front
        Front Vertical Down
        Front Vertical Up
        Lifter Switch Down
        Lifter Switch Up
        Slide Rear
        Slide Front
        Lumbar Switch Front
        Lumbar Switch Rear













      OK
      On the GTS screen, ON or OFF is displayed accordingly
      Result
      Proceed to
      OK
      NG

  3. Click here

    PERFORM ACTIVE TEST USING GTS (POWER SEAT MOTOR)


    1. Enter the following menus: Body Electrical / Driver Seat / Active Test.

    2. Perform the Active Test according to the display on the GTS.


      1. Body Electrical > Driver Seat > Active Test
        Tester Display Measurement Item Control Range Diagnostic Note
        Seat Reclining Seat reclining operation OFF/Rear/Front -
        Front Vertical Operation Seat front vertical operation OFF/Down/Up -
        Lifter Operation Seat lifter operation OFF/Down/Up -
        Seat Slide Operation Seat slide operation OFF/Rear/Front -
        Lumbar Slide Lumbar support operation OFF/Rear/Front -







      1. Body Electrical > Driver Seat > Active Test
        Tester Display
        Seat Reclining





      1. Body Electrical > Driver Seat > Active Test
        Tester Display
        Front Vertical Operation





      1. Body Electrical > Driver Seat > Active Test
        Tester Display
        Lifter Operation





      1. Body Electrical > Driver Seat > Active Test
        Tester Display
        Seat Slide Operation





      1. Body Electrical > Driver Seat > Active Test
        Tester Display
        Lumbar Slide




      Result
      Result Proceed to
      All power seat functions operate normally A
      Slide function does not operate normally B
      Front vertical function does not operate normally C
      Lifter function does not operate normally D
      Reclining function does not operate normally E
      Lumbar support adjustment function does not operate normally F

  4. Click here

    INSPECT SLIDE MOTOR (FRONT SEAT ADJUSTER ASSEMBLY (DRIVER SEAT))


    1. Remove the slide motor (front seat adjuster assembly (driver seat)).

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    2. Inspect the slide motor (front seat adjuster assembly (driver seat)).

      Click here

      Result
      Proceed to
      OK
      NG

    • OKClick here

      GO TO STEP 9

    • NG

      REPLACE SLIDE MOTOR (FRONT SEAT ADJUSTER ASSEMBLY (DRIVER SEAT))Click here

  5. Click here

    INSPECT POWER SEAT TILT MOTOR ASSEMBLY (DRIVER SEAT)


    1. Remove the power seat tilt motor assembly (driver seat).

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    2. Inspect the power seat tilt motor assembly (driver seat).

      Click here

      Result
      Proceed to
      OK
      NG

  6. Click here

    INSPECT POWER SEAT LIFTER MOTOR ASSEMBLY (DRIVER SEAT)


    1. Remove the power seat lifter motor assembly (driver seat).

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    2. Inspect the power seat lifter motor assembly (driver seat).

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      Result
      Proceed to
      OK
      NG

  7. Click here

    INSPECT RECLINING MOTOR (FRONT SEATBACK FRAME SUB-ASSEMBLY (DRIVER SEAT))


    1. Remove the reclining motor (front seatback frame sub-assembly (driver seat)).

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    2. Inspect the reclining motor (front seatback frame sub-assembly (driver seat)).

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      Result
      Proceed to
      OK
      NG

  8. Click here

    INSPECT LUMBAR SUPPORT ADJUSTER ASSEMBLY (DRIVER SEAT)


    1. Remove the lumbar support adjuster assembly (driver seat).

      Click here

    2. Inspect the lumbar support adjuster assembly (driver seat).

      Click here

      Result
      Proceed to
      OK
      NG

  9. Click here

    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY (DRIVER SEAT) - POWER SEAT MOTOR)


    1. Disconnect the a10 and a11 position control ECU assembly (driver seat) connectors.

    2. Measure the resistance according to the value(s) in the table below.

      Tip:

      Check the wire harness and connector between the position control ECU assembly (driver seat) and applicable motor.

      Standard Resistance
      Tester Connection Condition Specified Condition
      a10-1 (SLD+) - a5-4 Always Below 1 Ω
      a10-1 (SLD+) or a5-4 - Body ground Always 10 kΩ or higher
      a10-5 (SLD-) - a5-1 Always Below 1 Ω
      a10-5 (SLD-) or a5-1 - Body ground Always 10 kΩ or higher
      a10-7 (FRV+) - a6-1 Always Below 1 Ω
      a10-7 (FRV+) or a6-1 - Body ground Always 10 kΩ or higher
      a11-4 (FRV-) - a6-4 Always Below 1 Ω
      a11-4 (FRV-) or a6-4 - Body ground Always 10 kΩ or higher
      a10-6 (LFT+) - a7-1 Always Below 1 Ω
      a10-6 (LFT+) or a7-1 - Body ground Always 10 kΩ or higher
      a11-5 (LFT-) - a7-4 Always Below 1 Ω
      a11-5 (LFT-) or a7-4 - Body ground Always 10 kΩ or higher
      a10-10 (RCL+) - o1-1 Always Below 1 Ω
      a10-10 (RCL+) or o1-1 - Body ground Always 10 kΩ or higher
      a11-6 (RCL-) - o1-4 Always Below 1 Ω
      a11-6 (RCL-) or o1-4 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE POSITION CONTROL ECU ASSEMBLY (DRIVER SEAT)Click here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  10. Click here

    INSPECT FRONT POWER SEAT SWITCH (DRIVER SEAT)


    1. Remove the front power seat switch (driver seat).

      Click here

    2. Inspect the front power seat switch (driver seat).

      Click here

      Result
      Proceed to
      OK
      NG

  11. Click here

    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY (DRIVER SEAT) - FRONT POWER SEAT SWITCH (DRIVER SEAT))


    1. Disconnect the a12 position control ECU assembly (driver seat) connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      a8-5 (SLDR) - a12-23 (SLDR) Always Below 1 Ω
      a8-5 (SLDR) or a12-23 (SLDR) - Body ground Always 10 kΩ or higher
      a8-4 (SLDF) - a12-9 (SLDF) Always Below 1 Ω
      a8-4 (SLDF) or a12-9 (SLDF) - Body ground Always 10 kΩ or higher
      a8-10 (RCLR) - a12-22 (RCLR) Always Below 1 Ω
      a8-10 (RCLR) or a12-22 (RCLR) - Body ground Always 10 kΩ or higher
      a8-9 (RCLF) - a12-8 (RCLF) Always Below 1 Ω
      a8-9 (RCLF) or a12-8 (RCLF) - Body ground Always 10 kΩ or higher
      a8-7 (FUP) - a12-6 (FUP) Always Below 1 Ω
      a8-7 (FUP) or a12-6 (FUP) - Body ground Always 10 kΩ or higher
      a8-6 (FDWN) - a12-20 (FDWN) Always Below 1 Ω
      a8-6 (FDWN) or a12-20 (FDWN) - Body ground Always 10 kΩ or higher
      a8-8 (LUP) - a12-7 (LUP) Always Below 1 Ω
      a8-8 (LUP) or a12-7 (LUP) - Body ground Always 10 kΩ or higher
      a8-3 (LDWN) - a12-21 (LDWN) Always Below 1 Ω
      a8-3 (LDWN) or a12-21 (LDWN) - Body ground Always 10 kΩ or higher
      a8-17 (H) - a12-4 (H) Always Below 1 Ω
      a8-17 (H) or a12-4 (H) - Body ground Always 10 kΩ or higher
      a8-14 (R) - a12-18 (R) Always Below 1 Ω
      a8-14 (R) or a12-18 (R) - Body ground Always 10 kΩ or higher
      a8-11 (E) - a12-12 (SENG) Always Below 1 Ω
      a8-11 (E) or a12-12 (SENG) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE POSITION CONTROL ECU ASSEMBLY (DRIVER SEAT)Click here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR