SEAT VIBRATION SYSTEM Seat Vibrator does not Operate

DESCRIPTION

The position control ECU operates the seat vibrator based on the signals from the seat vibrator switch.

WIRING DIAGRAM

A000TBUE20
A000YG1E05
A000YG1E07

PROCEDURE


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


    1. A000WA5E02

      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
      for LH Side
      Tester Connection Condition Specified Condition
      f43-3 (VB+) - Body ground Always 11 to 14 V
      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
      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
      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

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK POSITION CONTROL ECU (SWITCH CIRCUIT)


    1. A000W78E02

      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
      for LH Side
      Tester Connection Switch Condition Specified Condition
      f43-20 (VSW) - Body ground

      Power switch on (IG)

      Vibrator switch OFF

      		 Below 1 V

      Power switch on (IG)

      Vibrator switch ON

      		 2 to 3 V
      Other than above 4 to 5 V
      for RH Side
      Tester Connection Switch Condition Specified Condition
      f39-20 (VSW) - Body ground

      Power switch on (IG)

      Vibrator switch OFF

      		 Below 1 V

      Power switch on (IG)

      Vibrator switch ON

      		 2 to 3 V
      Other than above 4 to 5 V

    NG

    CHECK SEAT TYPE Click here

    OK

  3. CHECK POSITION CONTROL ECU


    1. A000T8LE01

      Remove the position control ECU with its connectors still connected.

    2. Using an oscilloscope, check the waveform.

      Measurement condition (for LH Side)
      Item Content
      Terminal No. (Symbols) f43-12 (VIB+) - f43-11 (VIB-)
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition

      power switch on (IG)

      Vibrator switch ON
      Measurement condition (for RH Side)
      Item Content
      Terminal No. (Symbols) f39-12 (VIB+) - f39-11 (VIB-)
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition

      Power switch on (IG)

      Vibrator switch ON
      OK
      Waveform is as shown in the illustration.

    OK

    REPLACE POSITION CONTROL ECU Click here

    NG

    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU - SEAT VIBRATOR) Click here

  4. CHECK SEAT TYPE


    1. Check seat type.

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

    B

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

    A

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


    1. Disconnect the Y6 switch connector.

      A000TUKE04

    2. for LH Side:

      Disconnect the f43 ECU connector.

    3. for RH Side:

      Disconnect the f39 ECU connector.

    4. Measure the resistance according to the values in the table below.

      Standard resistance
      for LH Side
      Tester Connection Condition Specified Condition
      f43-20 (VSW) - Y6-8 (VSWL) Always Below 1 Ω
      Y6-10 (E2) - Body ground Always Below 1 Ω
      f43-20 (VSW) - Body ground Always 10 kΩ or higher
      for RH Side
      Tester Connection Condition Specified Condition
      f39-20 (VSW) - Y6-6 (VSWR) Always Below 1 Ω
      Y6-10 (E2) - Body ground Always Below 1 Ω
      f39-20 (VSW) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK SEAT VIBRATOR SWITCH (OPERATION)


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

      OK
      Seat vibrator operates normally.

    OK

    END (SEAT VIBRATOR SWITCH IS DEFECTIVE)

    NG

    REPLACE POSITION CONTROL ECU Click here

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

    Tech Tips

    *1: LH Side

    *2: RH Side

    A000VPBE02

    1. for LHD:


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

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

      A000XJYE02

    2. 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 values in the table below.

      Standard resistance
      for LHD
      Tester Connection Condition Specified Condition
      f43-20 (VSW) - z89-1 (VSWL)*1 Always Below 1 Ω
      z89-4 (E3) - Body ground*1 Always Below 1 Ω
      f43-20 (VSW) - Body ground*1 Always 10 kΩ or higher
      f39-20 (VSW) - z88-3 (VSWL)*2 Always Below 1 Ω
      z88-14 (E) - Body ground*2 Always Below 1 Ω
      f39-20 (VSW) - Body ground*2 Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      f43-20 (VSW) - z88-3 (VSWR)*1 Always Below 1 Ω
      z88-14 (E) - Body ground*1 Always Below 1 Ω
      f43-20 (VSW) - Body ground*1 Always 10 kΩ or higher
      f39-20 (VSW) - z89-2 (VSWL)*2 Always Below 1 Ω
      z89-4 (E3) - Body ground*2 Always Below 1 Ω
      f39-20 (VSW) - Body ground*2 Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. CHECK SEAT VIBRATOR SWITCH (OPERATION)


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

      OK
      Seat vibrator operates normally.

    OK

    END (SEAT VIBRATOR SWITCH IS DEFECTIVE)

    NG

    REPLACE POSITION CONTROL ECU Click here

  9. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU - SEAT VIBRATOR)


    1. for LH Side:

      A00104RE04

      1. Disconnect the f43 ECU connector.

      2. Disconnect the f22 vibrator connector.

    2. for RH Side:


      1. Disconnect the f39 ECU connector.

      2. Disconnect the f2 vibrator connector.

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

      Standard resistance
      for LH Side
      Tester Connection Condition Specified Condition
      f43-12 (VIB+) - f22-1 (C2) Always Below 1 Ω
      f43-11 (VIB-) - f22-2 (C1) Always Below 1 Ω
      f43-12 (VIB+) - Body ground Always 10 kΩ or higher
      f43-11 (VIB-) - Body ground Always 10 kΩ or higher
      for RH Side
      Tester Connection Condition Specified Condition
      f39-12 (VIB+) - f2-1 (C2) Always Below 1 Ω
      f39-11 (VIB-) - f2-2 (C1) Always Below 1 Ω
      f39-12 (VIB+) - Body ground Always 10 kΩ or higher
      f39-11 (VIB-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK POSITION CONTROL ECU (OPERATION)


    1. Replace the position control ECU with a new or normally operating one. Perform an operation inspection.

      OK
      Seat vibrator operates normally.
      Result
      Result Proceed to
      OK A
      NG (w/o Ottoman) B
      NG (w/ Ottoman) C

    A

    END (POSITION CONTROL ECU IS DEFECTIVE)

    B

    REPLACE SEPARATE TYPE REAR SEATBACK ASSEMBLY (SEAT VIBRATOR) Click here

    C

    REPLACE SEPARATE TYPE REAR SEATBACK ASSEMBLY (SEAT VIBRATOR) Click here