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SEAT VIBRATION SYSTEM Position of Seat Vibrator cannot be Adjusted

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DTC Code DTC Name
  Position of Seat Vibrator cannot be Adjusted
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DESCRIPTION

The position control ECU operates the lumbar motor based on the signals received from the seat vibrator switch to adjust the seat vibrator position.

A01GY9DE08
A01GY9DE07
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WIRING DIAGRAM

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INSPECTION PROCEDURE

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PROCEDURE


  1. Click here

    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU - BATTERY AND BODY GROUND)


    1. A01H06IE09

      for LH Side:

      Disconnect the f43 ECU connector.

    2. for RH Side:

      Disconnect the f39 ECU connector.

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

      Standard voltage
      Table 1. for LH Side
      Tester Connection Condition Specified Condition
      f43-3 (VB+) - Body ground Always 11 to 14 V
      Table 2. for RH Side
      Tester Connection Condition Specified Condition
      f39-3 (VB+) - Body ground Always 11 to 14 V

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

      Standard resistance
      Table 3. for LH Side
      Tester Connection Condition Specified Condition
      f43-10 (VGND) - Body ground Always Below 1 Ω
      f43-23 (SGND) - Body ground Always Below 1 Ω
      Table 4. for RH Side
      Tester Connection Condition Specified Condition
      f39-10 (VGND) - Body ground Always Below 1 Ω
      f39-23 (SGND) - Body ground Always Below 1 Ω

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    CHECK POSITION CONTROL ECU (SWITCH CIRCUIT)


    1. A01H0EKE12

      Remove the position control ECU with its connectors still connected

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

      Standard voltage
      Table 5. for LH Side
      Tester Connection Switch Condition Specified Condition
      f43-21 (MSW) - Body ground

      Power switch on (IG)

      Lumbar switch (rearward) ON

      		 Below 1 V

      Power switch on (IG)

      Lumbar switch (forward) ON

      		 2 to 3 V
      Other than above 4 to 5 V
      Table 6. for RH Side
      Tester Connection Switch Condition Specified Condition
      f39-21 (MSW) - Body ground

      Power switch on (IG)

      Lumbar switch (rearward) ON

      		 Below 1 V

      Power switch on (IG)

      Lumbar switch (forward) ON

      		 2 to 3 V
      Other than above 4 to 5 V

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    INSPECT SEPARATE TYPE REAR SEATBACK ASSEMBLY (LUMBAR MOTOR)


    1. A01H0K0E28

      Check the operation of the lumbar motor.


      1. Apply battery voltage to the lumbar motor.

      2. Check that the lumbar support adjuster moves smoothly.

        OK
        Table 7. for LH Side
        Measurement Condition Operation Direction

        Battery positive (+) → 2

        Battery negative (-) → 1

        		 Forward

        Battery positive (+) → 1

        Battery negative (-) → 2

        		 Backward
        Table 8. for RH Side
        Measurement Condition Operation Direction

        Battery positive (+) → 1

        Battery negative (-) → 2

        		 Forward

        Battery positive (+) → 2

        Battery negative (-) → 1

        		 Backward
        Table 9. Result
        Result Proceed to
        OK A
        NG (w/o Ottoman) B
        NG (w/ Ottoman) C

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    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU - LUMBAR MOTOR)


    1. A01GWIHE12

      for LH Side:


      1. Disconnect the f43 ECU connector.

      2. Disconnect the f44 motor connector.

    2. for RH Side:


      1. Disconnect the f39 ECU connector.

      2. Disconnect the f41 motor connector.

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

      Standard resistance
      Table 10. for LH Side
      Tester Connection Condition Specified Condition
      f43-1 (LVM+) - f44-2 Always Below 1 Ω
      f43-2 (LVM-) - f44-1 Always Below 1 Ω
      f43-1 (LVM+) - Body ground Always 10 kΩ or higher
      f43-2 (LVM-) - Body ground Always 10 kΩ or higher
      Table 11. for RH Side
      Tester Connection Condition Specified Condition
      f39-1 (LVM+) - f41-1 Always Below 1 Ω
      f39-2 (LVM-) - f41-2 Always Below 1 Ω
      f39-1 (LVM+) - Body ground Always 10 kΩ or higher
      f39-2 (LVM-) - Body ground Always 10 kΩ or higher
      Table 12. Result
      Result Proceed to
      OK (w/ Ottoman) A
      OK (w/o Ottoman) B
      NG C

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    CHECK SEAT TYPE


    1. Check seat type.

      Table 13. Result
      Result Proceed to
      for 4-Passenger with Ottoman A
      for 5-Passenger with Ottoman B

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    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU - SEAT VIBRATOR SWITCH AND BODY GROUND)


    1. A01GXI1E14

      for LH Side:

      Disconnect the f43 ECU connector.

    2. Disconnect the Y6 switch connector.

    3. for RH Side:

      Disconnect the f39 ECU connector.

    4. Disconnect the Y6 switch connector.

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

      Standard resistance
      Table 14. for LH Side
      Tester Connection Condition Specified Condition
      f43-21 (MSW) - Y6-9 (MSWL) Always Below 1 Ω
      Y6-10 (E2) - Body ground Always Below 1 Ω
      f43-21 (MSW) - Body ground Always 10 kΩ or higher
      Table 15. for RH Side
      Tester Connection Condition Specified Condition
      f39-21 (MSW) - Y6-7 (MSWR) Always Below 1 Ω
      Y6-10 (E2) - Body ground Always Below 1 Ω
      f39-21 (MSW) - Body ground Always 10 kΩ or higher

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    CHECK SEAT VIBRATOR SWITCH (OPERATION)


    1. Replace the seat vibrator switch with a new or normally operating one. Perform an operation inspection.

      OK
      Lumbar motor operates normally.

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    END (SEAT VIBRATOR SWITCH IS DEFECTIVE)

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    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU - SEAT VIBRATOR SWITCH AND BODY GROUND)

    Tip:

    *1: LH Side

    *2: RH Side


    1. A01H0TZE13

      for LHD:


      1. Disconnect the f43*1 or f39*2 ECU connector.

      2. Disconnect the z88*1 or z89*2 switch connector.

    2. A01H0TZE14

      for RHD:


      1. Disconnect the f43*1 or f39*2 ECU connector.

      2. Disconnect the z89*1 or z88*2 switch connector.

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

      Standard resistance
      Table 16. for LHD
      Tester Connection Condition Specified Condition
      f43-21 (MSW) - z89-2 (MSWLR)*1 Always Below 1 Ω
      z89-4 (E3) - Body ground*1 Always Below 1 Ω
      f43-21 (MSW) - Body ground*1 Always 10 kΩ or higher
      f39-21 (MSW) - z88-4 (MSWR)*2 Always Below 1 Ω
      z88-14 (E) - Body ground*2 Always Below 1 Ω
      f39-21 (MSW) - Body ground*2 Always 10 kΩ or higher
      Table 17. for RHD
      Tester Connection Condition Specified Condition
      f43-21 (MSW) - z88-4 (MSWR)*1 Always Below 1 Ω
      z88-14 (E) - Body ground*1 Always Below 1 Ω
      f43-21 (MSW) - Body ground*1 Always 10 kΩ or higher
      f39-21 (MSW) - z89-2 (MSWL)*2 Always Below 1 Ω
      z89-4 (E3) - Body ground*2 Always Below 1 Ω
      f39-21 (MSW) - Body ground*2 Always 10 kΩ or higher

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    CHECK SEAT VIBRATOR SWITCH (OPERATION)


    1. Replace the seat vibrator switch with a new or normally operating one. Perform an operation inspection.

      OK
      Lumbar motor operates normally.

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    END (SEAT VIBRATOR SWITCH IS DEFECTIVE)

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    REPAIR OR REPLACE HARNESS OR CONNECTOR

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    REPLACE SEPARATE TYPE REAR SEATBACK ASSEMBLYClick here

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    REPLACE SEPARATE TYPE REAR SEATBACK ASSEMBLYClick here

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    REPLACE POSITION CONTROL ECUClick here

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    REPAIR OR REPLACE HARNESS OR CONNECTOR

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    REPAIR OR REPLACE HARNESS OR CONNECTOR

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    REPLACE POSITION CONTROL ECUClick here

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    REPAIR OR REPLACE HARNESS OR CONNECTOR

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    REPLACE POSITION CONTROL ECUClick here