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FRONT POWER SEAT CONTROL SYSTEM 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 and switch assembly (driver seat) or position control ECU and switch assembly (front passenger seat). The built-in ECU manages the signals received from the position control ECU and switch assembly (driver seat) or position control ECU and switch assembly (front passenger seat), and operates each motor. If the position control ECU and switch assembly (driver seat) or position control ECU and switch assembly (front passenger seat) receives more than 2 motor operation signals, the motor is stopped. Manual operation is restarted after the position control ECU and switch assembly (driver seat) or position control ECU and switch assembly (front passenger seat) receives 1 signal only.

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WIRING DIAGRAM


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  1. B006709E06
    Table 1.
    *a Lumbar Support Adjuster Assembly LH
    *b Position Control ECU and Switch Assembly LH
    *c Front Lumbar Power Seat Switch
    B0066UZE07

    for Driver Seat

  2. B0065PPE05

    for Front Passenger Seat

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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 position control ECU and switch assembly (driver seat) or position control ECU and switch assembly (front passenger seat).

      Click here

      Result
      Result Proceed to
      Driver power seat functions do not operate A
      Front passenger power seat functions do not operate B

  2. Click here

    CHECK FRONT POWER SEAT OPERATION


    1. Check that each function of the power seat operates normally by using the position control ECU and switch assembly (driver seat).

      Click here

      Result
      Result Proceed to
      One or more power seat functions (except lumbar support adjustment function) do not operate A
      All power seat functions do not operate B
      Front vertical and lifter functions do not operate C
      Only lumbar support adjustment function does not operate D

  3. 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

        		 -










      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











      OK
      ON or OFF is displayed on the GTS according to the table above.
      Result
      Proceed to
      OK
      NG

  4. 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 -






      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




      Result
      Result Proceed to
      The power seat functions operate normally. A
      Slide, front vertical or lifter function does not operate normally. B
      Reclining function does not operate normally. C

  5. Click here

    INSPECT FRONT SEAT ADJUSTER ASSEMBLY (DRIVER SEAT)

    Tip:

    Check the motor operation of applicable function.


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

      Click here

    2. Inspect the front seat adjuster assembly (driver seat) (slide motor, front vertical motor or lifter motor).

      Click here

      Result
      Proceed to
      OK
      NG

  6. Click here

    INSPECT FRONT SEATBACK FRAME SUB-ASSEMBLY (DRIVER SEAT)


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

      Click here

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

      Click here

      Result
      Proceed to
      OK
      NG

  7. Click here

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


    1. Disconnect the b4*1 or a4*2 position control ECU and switch assembly (driver seat) connector.


      • *1: for LHD

      • *2: for RHD

    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 and switch assembly (driver seat) and applicable motor.

      Standard Resistance
      Table 2. for LHD
      Tester Connection Condition Specified Condition
      b4-3 (SLD+) - b1-4 (FWD) Always Below 1 Ω
      b4-3 (SLD+) or b1-4 (FWD) - Body ground Always 10 kΩ or higher
      b4-4 (SLD-) - b1-1 (BACK) Always Below 1 Ω
      b4-4 (SLD-) or b1-1 (BACK) - Body ground Always 10 kΩ or higher
      b4-5 (FRV-) - b3-1 Always Below 1 Ω
      b4-5 (FRV-) or b3-1 - Body ground Always 10 kΩ or higher
      b4-8 (FRV+) - b3-2 Always Below 1 Ω
      b4-8 (FRV+) or b3-2 - Body ground Always 10 kΩ or higher
      b4-10 (LFT+) - b2-4 Always Below 1 Ω
      b4-10 (LFT+) or b2-4 - Body ground Always 10 kΩ or higher
      b4-12 (LFT-) - b2-1 Always Below 1 Ω
      b4-12 (LFT-) or b2-1 - Body ground Always 10 kΩ or higher
      b4-9 (RCL+) - d2-2 Always Below 1 Ω
      b4-9 (RCL+) or d2-2 - Body ground Always 10 kΩ or higher
      b4-11 (RCL-) - d2-1 Always Below 1 Ω
      b4-11 (RCL-) or d2-1 - Body ground Always 10 kΩ or higher
      Table 3. for RHD
      Tester Connection Condition Specified Condition
      a4-3 (SLD+) - a1-4 (FWD) Always Below 1 Ω
      a4-3 (SLD+) or a1-4 (FWD) - Body ground Always 10 kΩ or higher
      a4-4 (SLD-) - a1-1 (BACK) Always Below 1 Ω
      a4-4 (SLD-) or a1-1 (BACK) - Body ground Always 10 kΩ or higher
      a4-5 (FDWN) - a2-1 Always Below 1 Ω
      a4-5 (FDWN) or a2-1 - Body ground Always 10 kΩ or higher
      a4-8 (FUP) - a2-2 Always Below 1 Ω
      a4-8 (FUP) or a2-2 - Body ground Always 10 kΩ or higher
      a4-10 (LFT+) - a3-4 Always Below 1 Ω
      a4-10 (LFT+) or a3-4 - Body ground Always 10 kΩ or higher
      a4-12 (LFT-) - a3-1 Always Below 1 Ω
      a4-12 (LFT-) or a3-1 - Body ground Always 10 kΩ or higher
      a4-9 (RCL+) - c2-2 Always Below 1 Ω
      a4-9 (RCL+) or c2-2 - Body ground Always 10 kΩ or higher
      a4-11 (RCL-) - c2-1 Always Below 1 Ω
      a4-11 (RCL-) or c2-1 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (DRIVER SEAT)Click here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. Click here

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


    1. Disconnect the b5*1 or a5*2 position control ECU and switch assembly (driver seat) connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Voltage
      Table 4. for LHD
      Tester Connection Condition Specified Condition
      b5-12 (SYSB) - Body ground Always 11 to 14 V
      Table 5. for RHD
      Tester Connection Condition Specified Condition
      a5-12 (SYSB) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (DRIVER SEAT)Click here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. Click here

    INSPECT FRONT LUMBAR POWER SEAT SWITCH


    1. Remove the front lumbar power seat switch.

      Click here

    2. Inspect the front lumbar power seat switch.

      Click here

      Result
      Proceed to
      OK
      NG

  10. 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

  11. Click here

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


    1. Disconnect the b4*1 or a4*2 position control ECU and switch assembly (driver seat) connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      Table 6. for LHD
      Tester Connection Condition Specified Condition
      b4-6 (+B2) - b6-5 (B) Always Below 1 Ω
      b4-6 (+B2) or b6-5 (B) - Body ground Always 10 kΩ or higher
      b4-1 (GND2) - b6-2 (E2) Always Below 1 Ω
      b4-1 (GND2) or b6-2 (E2) - Body ground Always 10 kΩ or higher
      Table 7. for RHD
      Tester Connection Condition Specified Condition
      a4-6 (+B2) - a13-5 (B) Always Below 1 Ω
      a4-6 (+B2) or a13-5 (B) - Body ground Always 10 kΩ or higher
      a4-1 (GND2) - a13-2 (E2) Always Below 1 Ω
      a4-1 (GND2) or a13-2 (E2) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  12. Click here

    CHECK HARNESS AND CONNECTOR (FRONT LUMBAR POWER SEAT SWITCH - LUMBAR SUPPORT ADJUSTER ASSEMBLY (DRIVER SEAT))


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

      Standard Resistance
      Table 8. for LHD
      Tester Connection Condition Specified Condition
      b6-1 (R) - d3-2 Always Below 1 Ω
      b6-1 (R) or d3-2 - Body ground Always 10 kΩ or higher
      b6-3 (H) - d3-1 Always Below 1 Ω
      b6-3 (H) or d3-1 - Body ground Always 10 kΩ or higher
      Table 9. for RHD
      Tester Connection Condition Specified Condition
      a13-1 (R) - c4-2 Always Below 1 Ω
      a13-1 (R) or c4-2 - Body ground Always 10 kΩ or higher
      a13-3 (H) - c4-1 Always Below 1 Ω
      a13-3 (H) or c4-1 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (DRIVER SEAT)Click here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  13. Click here

    CHECK FRONT POWER SEAT OPERATION


    1. Check that each function of the power seat operates normally by using the position control ECU and switch assembly (front passenger 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
      Front vertical and lifter functions do not operate C

  14. 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 / Passenger Seat / Data List.

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


      1. Body Electrical > Passenger 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

        		 -










      1. Body Electrical > Passenger 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











      OK
      ON or OFF is displayed on the GTS according to the table above.
      Result
      Proceed to
      OK
      NG

  15. Click here

    PERFORM ACTIVE TEST USING GTS (POWER SEAT MOTOR)


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

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


      1. Body Electrical > Passenger 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 -






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





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





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





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




      Result
      Result Proceed to
      The power seat functions operate normally. A
      Slide, front vertical or lifter function does not operate normally. B
      Reclining function does not operate normally. C

  16. Click here

    INSPECT FRONT SEAT ADJUSTER ASSEMBLY (FRONT PASSENGER SEAT)

    Tip:

    Check the motor operation of applicable function.


    1. Remove the front seat adjuster assembly (front passenger seat).

      Click here

    2. Inspect the front seat adjuster assembly (driver seat) (slide motor, front vertical motor or lifter motor).

      Click here

      Result
      Proceed to
      OK
      NG

  17. Click here

    INSPECT FRONT SEATBACK FRAME SUB-ASSEMBLY (FRONT PASSENGER SEAT)


    1. Remove the front seatback frame sub-assembly (front passenger seat).

      Click here

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

      Click here

      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  18. Click here

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


    1. Disconnect the a4*1 or b4*2 position control ECU and switch assembly (front passenger seat) connector.


      • *1: for LHD

      • *2: for RHD

    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 and switch assembly (front passenger seat) and applicable motor.

      Standard Resistance
      Table 10. for LHD
      Tester Connection Condition Specified Condition
      a4-3 (SLD+) - a1-4 (FWD) Always Below 1 Ω
      a4-3 (SLD+) or a1-4 (FWD) - Body ground Always 10 kΩ or higher
      a4-4 (SLD-) - a1-1 (BACK) Always Below 1 Ω
      a4-4 (SLD-) or a1-1 (BACK) - Body ground Always 10 kΩ or higher
      a4-5 (FDWN) - a2-1 Always Below 1 Ω
      a4-5 (FDWN) or a2-1 - Body ground Always 10 kΩ or higher
      a4-8 (FUP) - a2-2 Always Below 1 Ω
      a4-8 (FUP) or a2-2 - Body ground Always 10 kΩ or higher
      a4-10 (LFT+) - a3-4 Always Below 1 Ω
      a4-10 (LFT+) or a3-4 - Body ground Always 10 kΩ or higher
      a4-12 (LFT-) - a3-1 Always Below 1 Ω
      a4-12 (LFT-) or a3-1 - Body ground Always 10 kΩ or higher
      a4-9 (RCL+) - c2-2 Always Below 1 Ω
      a4-9 (RCL+) or c2-2 - Body ground Always 10 kΩ or higher
      a4-11 (RCL-) - c2-1 Always Below 1 Ω
      a4-11 (RCL-) or c2-1 - Body ground Always 10 kΩ or higher
      Table 11. for RHD
      Tester Connection Condition Specified Condition
      b4-3 (SLD+) - b1-4 (FWD) Always Below 1 Ω
      b4-3 (SLD+) or b1-4 (FWD) - Body ground Always 10 kΩ or higher
      b4-4 (SLD-) - b1-1 (BACK) Always Below 1 Ω
      b4-4 (SLD-) or b1-1 (BACK) - Body ground Always 10 kΩ or higher
      b4-5 (FDWN) - b3-1 Always Below 1 Ω
      b4-5 (FDWN) or b3-1 - Body ground Always 10 kΩ or higher
      b4-8 (FUP) - b3-2 Always Below 1 Ω
      b4-8 (FUP) or b3-2 - Body ground Always 10 kΩ or higher
      b4-10 (LFT+) - b2-4 Always Below 1 Ω
      b4-10 (LFT+) or b2-4 - Body ground Always 10 kΩ or higher
      b4-12 (LFT-) - b2-1 Always Below 1 Ω
      b4-12 (LFT-) or b2-1 - Body ground Always 10 kΩ or higher
      b4-9 (RCL+) - d2-2 Always Below 1 Ω
      b4-9 (RCL+) or d2-2 - Body ground Always 10 kΩ or higher
      b4-11 (RCL-) - d2-1 Always Below 1 Ω
      b4-11 (RCL-) or d2-1 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT PASSENGER SEAT)Click here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  19. Click here

    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT PASSENGER SEAT) - BATTERY)


    1. Disconnect the a5*1 or b5*2 position control ECU and switch assembly (front passenger seat) connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Voltage
      Table 12. for LHD
      Tester Connection Condition Specified Condition
      a5-12 (SYSB) - Body ground Always 11 to 14 V
      Table 13. for RHD
      Tester Connection Condition Specified Condition
      b5-12 (SYSB) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY (FRONT PASSENGER SEAT)Click here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR