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

A01GL49E16
A01GMZ7E03
A01GMZ7E04

INSPECTION PROCEDURE

PROCEDURE


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


    1. A01GLT6E01

      for LH Side:

      Disconnect the f41 ECU connector.

    2. for RH Side:

      Disconnect the f38 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
      f41-3 (VB+) - Body ground Always 11 to 14 V
      for RH Side
      Tester Connection Condition Specified Condition
      f38-3 (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
      f41-10 (VGND) - Body ground Always Below 1 Ω
      f41-23 (SGND) - Body ground Always Below 1 Ω
      for RH Side
      Tester Connection Condition Specified Condition
      f38-10 (VGND) - Body ground Always Below 1 Ω
      f38-23 (SGND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK POSITION CONTROL ECU (SWITCH CIRCUIT)


    1. A01GIZXE02

      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
      f41-20 (VSW) - Body ground

      Engine switch on (IG)

      Vibrator switch OFF

      		 Below 1 V

      Engine 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
      f38-20 (VSW) - Body ground

      Engine switch on (IG)

      Vibrator switch OFF

      		 Below 1 V

      Engine 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. A01GNFBE01

      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) f41-12 (VIB+) - f41-11 (VIB-)
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition

      Engine switch on (IG)

      Vibrator switch ON
      Measurement condition (for RH Side)
      Item Content
      Terminal No. (Symbols) f38-12 (VIB+) - f38-11 (VIB-)
      Tool Setting 5 V/DIV., 20 ms/DIV.
      Condition

      Engine switch on (IG)

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

    NG

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

    OK

    REPLACE POSITION CONTROL ECU 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. A01GLR1E13

      Disconnect the Y6 switch connector.

    2. for LH Side:

      Disconnect the f41 ECU connector.

    3. for RH Side:

      Disconnect the f38 ECU connector.

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

      Standard resistance
      for LH Side
      Tester Connection Condition Specified Condition
      f41-20 (VSW) - Y6-9 (VSWL) Always Below 1 Ω
      Y6-10 (E2) - Body ground Always Below 1 Ω
      f41-20 (VSW) - Body ground Always 10 kΩ or higher
      for RH Side
      Tester Connection Condition Specified Condition
      f38-20 (VSW) - Y6-7 (VSWR) Always Below 1 Ω
      Y6-10 (E2) - Body ground Always Below 1 Ω
      f38-20 (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.

    NG

    REPLACE POSITION CONTROL ECU Click here

    OK

    END (SEAT VIBRATOR SWITCH IS DEFECTIVE)

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

    Tech Tips

    *1: LH Side

    *2: RH Side

    A01GI03E03

    1. for LHD, for 5-Passenger with Ottoman


      1. Disconnect the f41*1 or f38*2 ECU connector.

      2. Disconnect the r12*1 or r11*2 switch connector.

      A01GI03E08

    2. for RHD, for 5-Passenger with Ottoman


      1. Disconnect the f41*1 or f38*2 ECU connector.

      2. Disconnect the r11*1 or r12*2 switch connector.

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

      Standard resistance
      for LHD, for 5-Passenger with Ottoman
      Tester Connection Condition Specified Condition
      f41-20 (VSW) - r12-2 (MSWL)*1 Always Below 1 Ω
      r12-4 (E3) - Body ground*1 Always Below 1 Ω
      f41-20 (VSW) - Body ground*1 Always 10 kΩ or higher
      f38-20 (VSW) - r11-3 (MSWR) Always Below 1 Ω
      r11-14 (E) - Body ground Always Below 1 Ω
      f38-20 (VSW) - Body ground Always 10 kΩ or higher
      for RHD, for 5-Passenger with Ottoman
      Tester Connection Condition Specified Condition
      f41-20 (VSW) - r11-3 (VSMR)*1 Always Below 1 Ω
      r11-14 (E) - Body ground*1 Always Below 1 Ω
      f41-20 (VSW) - Body ground*1 Always 10 kΩ or higher
      f38-20 (VSW) - r12-2 (MSWL)*2 Always Below 1 Ω
      r12-4 (E3) - Body ground*2 Always Below 1 Ω
      f38-20 (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.

    NG

    REPLACE POSITION CONTROL ECU Click here

    OK

    END (SEAT VIBRATOR SWITCH IS DEFECTIVE)

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


    1. A01GKARE03

      for LH Side:


      1. Disconnect the f41 ECU connector.

      2. Disconnect the f22 vibrator connector.

    2. for RH Side:


      1. Disconnect the f38 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
      f41-12 (VIB+) - f22-1 (C2) Always Below 1 Ω
      f41-11 (VIB-) - f22-2 (C1) Always Below 1 Ω
      f41-12 (VIB+) - Body ground Always 10 kΩ or higher
      f41-11 (VIB-) - Body ground Always 10 kΩ or higher
      for RH Side
      Tester Connection Condition Specified Condition
      f38-12 (VIB+) - f2-1 (C2) Always Below 1 Ω
      f38-11 (VIB-) - f2-2 (C1) Always Below 1 Ω
      f38-12 (VIB+) - Body ground Always 10 kΩ or higher
      f38-11 (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

    B

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

    C

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

    A

    END (POSITION CONTROL ECU IS DEFECTIVE)