SEAT VIBRATION SYSTEM Rear Air Massage Function does not Operate

DESCRIPTION

The rear power seat switch (rear multi operation panel) sends switch operation signals to the position control ECU assembly via LIN communication. The position control ECU assembly that receives the signals operates the refresh seat functions by controlling the seat check valve, lumbar support pump and rear seatback heater.

WIRING DIAGRAM

Figure 1. RH Seat:

B0069KPE03
B006G83E07
B006C9RE04

Figure 2. LH Seat:

B0069KPE04
B006G83E08
B006C9RE05

CAUTION / NOTICE / HINT

Note


  • The seat vibration system uses the LIN communication system. First, confirm that there are no malfunctions in the LIN communication system. Refer to How to Proceed with Troubleshooting.

    Click here

  • Initializing the position control ECU assembly will clear the seat position memory.

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

Tech Tips

Make sure to initialize the position control ECU assembly after replacing the seat assembly or any related parts (including removal and installation).

Click here

PROCEDURE


  1. CHECK MALFUNCTIONING PARTS


    1. Check the problem symptoms.

      Result
      Result Proceed to
      Rear seat RH malfunctioning A
      Rear seat LH malfunctioning B

    B

    CHECK MALFUNCTIONING PARTS, COMPONENT AND AREA Click here

    A

  2. CHECK MALFUNCTIONING PARTS, COMPONENT AND AREA


    1. Check that each function of the refreshing seat operates normally.

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

    B

    PERFORM ACTIVE TEST USING GTS Click here

    A

  3. READ VALUE USING GTS (REAR BUCKLE SWITCH, OCCUPANT SENSOR, RELAXTION SWITCH SIGNAL)


    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 / Rear Right Seat / Data List.

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


      Body Electrical > Rear Right Seat > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Rear Buckle Switch Rear RH seat belt signal ON/OFF

      ON: Rear RH seat belt fastened

      OFF: Rear RH seat belt unfastened

      		 -
      Occupant Sensor Occupant detection sensor signal ON/OFF

      ON: Rear RH seat occupied

      OFF: Rear RH seat not occupied

      		 -
      Relaxation Switch Signal Relaxation switch signal ON/OFF

      ON: Touch "Relaxation"

      OFF: Not touch "Relaxation"

      		 -

      Body Electrical > Rear Right Seat > Data List
      Tester Display
      Rear Buckle Switch
      Occupant Sensor
      Relaxation Switch Signal
      OK
      ON or OFF is displayed on the GTS according to the table above.
      Result
      Result Proceed to
      OK A
      NG (Item: Rear Buckle Switch) B
      NG (Item: Occupant Sensor) C
      NG (Item: Relaxation Switch Signal) D

    B

    INSPECT REAR SEAT INNER BELT ASSEMBLY RH Click here

    C

    INSPECT REAR SEAT CUSHION PAD RH (OCCUPANT DETECTION SENSOR) Click here

    D

    GO TO REAR MULTI OPERATION PANEL SYSTEM

    A

  4. INSPECT LUMBAR SUPPORT PUMP SUB-ASSEMBLY RH


    1. Remove the lumbar support pump sub-assembly RH.

      Click here

    2. Inspect the lumbar support pump sub-assembly RH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE LUMBAR SUPPORT PUMP SUB-ASSEMBLY RH Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY RH - LUMBAR SUPPORT PUMP SUB-ASSEMBLY RH)


    1. Disconnect the R6 position control ECU assembly RH connector.

    2. Disconnect the R17 lumbar support pump sub-assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R6-10 (POM) - R17-1 Always Below 1 Ω
      R6-11 (POMG) - R17-2 Always Below 1 Ω
      R6-10 (POM) or R17-1 - Other terminals and body ground Always 10 kΩ or higher
      R6-11 (POMG or R17-2 - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK HARNESS AND CONNECTOR (SEAT CHECK VALVE RH - BATTERY AND BODY GROUND)


    1. Disconnect the R12 No. 1 seatback check with hose valve RH connector.

    2. Disconnect the R13 No. 2 seatback check with hose valve RH connector.

    3. Disconnect the T3 seat cushion check with hose valve RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R12-1 (GND) - Body ground Always Below 1 Ω
      R13-1 (GND) - Body ground Always Below 1 Ω
      T3-1 (GND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      R12-3 (SYSB) - Body ground Always 11 to 14 V
      R13-3 (SYSB) - Body ground Always 11 to 14 V
      T3-3 (SYSB) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY RH - SEAT CHECK VALVE RH)


    1. Disconnect the R6 No. 1 position control ECU assembly RH connector.

    2. Disconnect the R12 No. 1 seatback check with hose valve RH connector.

    3. Disconnect the R13 No. 2 seatback check with hose valve RH connector.

    4. Disconnect the T3 seat cushion check with hose valve RH connector.

    5. Disconnect the R11 seatback check with bracket valve RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R41-2 (LINM) - R12-5 (LIN) Always Below 1 Ω
      R41-2 (LINM) - R13-5 (LIN) Always Below 1 Ω
      R41-2 (LINM) - T3-5 (LIN) Always Below 1 Ω
      R41-2 (LINM) or R12-5 (LIN) - Other terminals and body ground Always 10 kΩ or higher
      R41-2 (LINM) or R13-5 (LIN) - Other terminals and body ground Always 10 kΩ or higher
      R41-2 (LINM) or T3-5 (LIN) - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY RH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. INSPECT REAR SEAT INNER BELT ASSEMBLY RH


    1. Remove the rear seat inner belt assembly RH.

      Click here

    2. Inspect the rear seat inner belt assembly RH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR SEAT INNER BELT ASSEMBLY RH Click here

    OK

  9. CHECK HARNESS AND CONNECTOR (REAR SEAT INNER BELT ASSEMBLY RH - POSITION CONTROL ECU ASSEMBLY RH)


    1. Disconnect the R24 rear seat inner belt assembly RH connector.

    2. Disconnect the R7 position control ECU assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R24-10 - R7-3 (BCL1) Always Below 1 Ω
      R24-4 - Body ground Always Below 1 Ω
      R24-10 or R7-3 (BCL1) - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY RH Click here

    NG

    REPLACE REAR SEAT INNNER BELT ASSEMBLY RH Click here

  10. INSPECT REAR SEAT CUSHION PAD RH (OCCUPANT DETECTION SENSOR)


    1. Remove the rear seat cushion pad RH (occupant detection sensor).

      Click here

    2. Inspect the rear seat cushion pad RH (occupant detection sensor).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR SEAT CUSHION PAD RH Click here

    OK

  11. CHECK HARNESS AND CONNECTOR (REAR SEAT CUSHION PAD RH - POSITION CONTROL ECU ASSEMBLY RH)


    1. Disconnect the T4 rear seat cushion pad RH connector.

    2. Disconnect the R7 position control ECU assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T4-3 (ZJK) - R7-17 (ODS) Always Below 1 Ω
      T4-1 (QD2) - Body ground Always Below 1 Ω
      T4-3 (ZJK) or R7-17 (ODS) - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY RH Click here

    NG

    REPLACE REAR SEAT INNNER BELT ASSEMBLY RH Click here

  12. PERFORM ACTIVE TEST USING GTS


    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 / Rear Right Seat / Active Test.

    5. B006EDMC01
      *a Example
      *1 BR5
      *2 BR4
      *3 BR3
      *4 BR2
      *5 BR1
      *6 BL5
      *7 BL4
      *8 BL3
      *9 BL2
      *10 BL1
      *11 C5
      *12 C2
      *13 C1
      *14 C4
      *15 C3

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


      Body Electrical > Rear Right Seat > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Refresh BL1 Seatback bladder assembly OFF/ON -
      Refresh BL2 Seatback bladder assembly OFF/ON -
      Refresh BL3 Seatback bladder assembly OFF/ON -
      Refresh BL4 Seatback bladder assembly OFF/ON -
      Refresh BL5 Seatback bladder assembly OFF/ON -
      Refresh BR1 Seatback bladder assembly OFF/ON -
      Refresh BR2 Seatback bladder assembly OFF/ON -
      Refresh BR3 Seatback bladder assembly OFF/ON -
      Refresh BR4 Seatback bladder assembly OFF/ON -
      Refresh BR5 Seatback bladder assembly OFF/ON -
      Refresh C1 Seat cushion bladder assembly OFF/ON -
      Refresh C2 Seat cushion bladder assembly OFF/ON -
      Refresh C5 Seat cushion bladder assembly OFF/ON -
      Refresh C4 Seat cushion bladder assembly OFF/ON -
      Refresh C3 Seat cushion bladder assembly OFF/ON -

      Body Electrical > Rear Right Seat > Active Test
      Tester Display
      Refresh BL1

      Body Electrical > Rear Right Seat > Active Test
      Tester Display
      Refresh BL2

      Body Electrical > Rear Right Seat > Active Test
      Tester Display
      Refresh BL3

      Body Electrical > Rear Right Seat > Active Test
      Tester Display
      Refresh BL4

      Body Electrical > Rear Right Seat > Active Test
      Tester Display
      Refresh BL5

      Body Electrical > Rear Right Seat > Active Test
      Tester Display
      Refresh BR1

      Body Electrical > Rear Right Seat > Active Test
      Tester Display
      Refresh BR2

      Body Electrical > Rear Right Seat > Active Test
      Tester Display
      Refresh BR3

      Body Electrical > Rear Right Seat > Active Test
      Tester Display
      Refresh BR4

      Body Electrical > Rear Right Seat > Active Test
      Tester Display
      Refresh BR5

      Body Electrical > Rear Right Seat > Active Test
      Tester Display
      Refresh C1

      Body Electrical > Rear Right Seat > Active Test
      Tester Display
      Refresh C2

      Body Electrical > Rear Right Seat > Active Test
      Tester Display
      Refresh C5

      Body Electrical > Rear Right Seat > Active Test
      Tester Display
      Refresh C4

      Body Electrical > Rear Right Seat > Active Test
      Tester Display
      Refresh C3
      Result
      Proceed
      NEXT

    NEXT

    CHECK REFRESHING SEAT Click here
    CHECK REFRESHING SEAT Click here
    CHECK REFRESHING SEAT Click here

  13. CHECK MALFUNCTIONING PARTS, COMPONENT AND AREA


    1. Check that each function of the refreshing seat operates normally.

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

    B

    PERFORM ACTIVE TEST USING GTS Click here

    A

  14. READ VALUE USING GTS (REAR BUCKLE SWITCH, OCCUPANT SENSOR, RELAXTION SWITCH SIGNAL)


    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 / Rear Left Seat / Data List.

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


      Body Electrical > Rear Left Seat > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Rear Buckle Switch Rear LH seat belt signal ON/OFF

      ON: Rear LH seat belt fastened

      OFF: Rear LH seat belt unfastened

      		 -
      Occupant Sensor Occupant detection sensor signal ON/OFF

      ON: Rear LH seat occupied

      OFF: Rear LH seat not occupied

      		 -
      Relaxation Switch Signal Relaxation switch signal ON/OFF

      ON: Touch "Relaxation"

      OFF: Not touch "Relaxation"

      		 -

      Body Electrical > Rear Left Seat > Data List
      Tester Display
      Rear Buckle Switch
      Occupant Sensor
      Relaxation Switch Signal
      OK
      ON or OFF is displayed on the GTS according to the table above.
      Result
      Result Proceed to
      OK A
      NG (Item: Rear Buckle Switch) B
      NG (Item: Occupant Sensor) C
      NG (Item: Relaxation Switch Signal) D

    B

    INSPECT REAR SEAT INNER BELT ASSEMBLY LH Click here

    C

    INSPECT REAR SEAT CUSHION PAD LH (OCCUPANT DETECTION SENSOR) Click here

    D

    GO TO REAR MULTI OPERATION PANEL SYSTEM

    A

  15. INSPECT LUMBAR SUPPORT PUMP SUB-ASSEMBLY LH


    1. Remove the lumbar support pump sub-assembly LH.

      Click here

    2. Inspect the lumbar support pump sub-assembly LH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE LUMBAR SUPPORT PUMP SUB-ASSEMBLY RH Click here

    OK

  16. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY LH - LUMBAR SUPPORT PUMP SUB-ASSEMBLY LH)


    1. Disconnect the R40 position control ECU assembly LH connector.

    2. Disconnect the R48 lumbar support pump sub-assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R40-10 (POM) - R48-1 Always Below 1 Ω
      R40-11 (POMG) - R48-2 Always Below 1 Ω
      R40-10 (POM) or R48-1 - Other terminals and body ground Always 10 kΩ or higher
      R40-11 (POMG or R48-2 - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  17. CHECK HARNESS AND CONNECTOR (SEAT CHECK VALVE LH - BATTERY AND BODY GROUND)


    1. Disconnect the R45 No. 1 seatback check with hose valve LH connector.

    2. Disconnect the R47 No. 2 seatback check with hose valve LH connector.

    3. Disconnect the T10 seat cushion check with hose valve LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R45-1 (GND) - Body ground Always Below 1 Ω
      R47-1 (GND) - Body ground Always Below 1 Ω
      T10-1 (GND) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      R45-3 (SYSB) - Body ground Always 11 to 14 V
      R47-3 (SYSB) - Body ground Always 11 to 14 V
      T10-3 (SYSB) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  18. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY LH - SEAT CHECK VALVE LH)


    1. Disconnect the R41 No. 1 position control ECU assembly LH connector.

    2. Disconnect the R45 No. 1 seatback check with hose valve LH connector.

    3. Disconnect the R47 No. 2 seatback check with hose valve LH connector.

    4. Disconnect the T10 seat cushion check with hose valve LH connector.

    5. Disconnect the R44 seatback check with bracket valve LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R41-2 (LINM) - R45-5 (LIN) Always Below 1 Ω
      R41-2 (LINM) - R47-5 (LIN) Always Below 1 Ω
      R41-2 (LINM) - T10-5 (LIN) Always Below 1 Ω
      R41-2 (LINM) or R45-5 (LIN) - Other terminals and body ground Always 10 kΩ or higher
      R41-2 (LINM) or R47-5 (LIN) - Other terminals and body ground Always 10 kΩ or higher
      R41-2 (LINM) or T10-5 (LIN) - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  19. INSPECT REAR SEAT INNER BELT ASSEMBLY LH


    1. Remove the rear seat inner belt assembly LH.

      Click here

    2. Inspect the rear seat inner belt assembly LH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR SEAT INNER BELT ASSEMBLY LH Click here

    OK

  20. CHECK HARNESS AND CONNECTOR (REAR SEAT INNER BELT ASSEMBLY LH - POSITION CONTROL ECU ASSEMBLY LH)


    1. Disconnect the R49 rear seat inner belt assembly LH connector.

    2. Disconnect the R41 position control ECU assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R49-10 - R41-3 (BCL1) Always Below 1 Ω
      R49-4 - Body ground Always Below 1 Ω
      R49-10 or R41-3 (BCL1) - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY LH Click here

    NG

    REPLACE REAR SEAT INNER BELT ASSEMBLY LH Click here

  21. INSPECT REAR SEAT CUSHION PAD LH (OCCUPANT DETECTION SENSOR)


    1. Remove the rear seat cushion pad LH (occupant detection sensor).

      Click here

    2. Inspect the rear seat cushion pad LH (occupant detection sensor).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR SEAT CUSHION PAD LH Click here

    OK

  22. CHECK HARNESS AND CONNECTOR (REAR SEAT CUSHION PAD LH - POSITION CONTROL ECU ASSEMBLY LH)


    1. Disconnect the T11 rear seat cushion pad LH connector.

    2. Disconnect the R41 position control ECU assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      T11-3 (ZJK) - R41-17 (ODS) Always Below 1 Ω
      T11-1 (QD2) - Body ground Always Below 1 Ω
      T11-3 (ZJK) or R41-17 (ODS) - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE POSITION CONTROL ECU ASSEMBLY LH Click here

    NG

    REPLACE REAR SEAT INNER BELT ASSEMBLY LH Click here

  23. PERFORM ACTIVE TEST USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the engine switc on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Rear Left Seat / Active Test.

    5. B006EDMC01
      *a Example
      *1 BR5
      *2 BR4
      *3 BR3
      *4 BR2
      *5 BR1
      *6 BL5
      *7 BL4
      *8 BL3
      *9 BL2
      *10 BL1
      *11 C5
      *12 C2
      *13 C1
      *14 C4
      *15 C3

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


      Body Electrical > Rear Left Seat > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Refresh BL1 Seatback bladder assembly OFF/ON -
      Refresh BL2 Seatback bladder assembly OFF/ON -
      Refresh BL3 Seatback bladder assembly OFF/ON -
      Refresh BL4 Seatback bladder assembly OFF/ON -
      Refresh BL5 Seatback bladder assembly OFF/ON -
      Refresh BR1 Seatback bladder assembly OFF/ON -
      Refresh BR2 Seatback bladder assembly OFF/ON -
      Refresh BR3 Seatback bladder assembly OFF/ON -
      Refresh BR4 Seatback bladder assembly OFF/ON -
      Refresh BR5 Seatback bladder assembly OFF/ON -
      Refresh C1 Seat cushion bladder assembly OFF/ON -
      Refresh C2 Seat cushion bladder assembly OFF/ON -
      Refresh C5 Seat cushion bladder assembly OFF/ON -
      Refresh C4 Seat cushion bladder assembly OFF/ON -
      Refresh C3 Seat cushion bladder assembly OFF/ON -

      Body Electrical > Rear Left Seat > Active Test
      Tester Display
      Refresh BL1

      Body Electrical > Rear Left Seat > Active Test
      Tester Display
      Refresh BL2

      Body Electrical > Rear Left Seat > Active Test
      Tester Display
      Refresh BL3

      Body Electrical > Rear Left Seat > Active Test
      Tester Display
      Refresh BL4

      Body Electrical > Rear Left Seat > Active Test
      Tester Display
      Refresh BL5

      Body Electrical > Rear Left Seat > Active Test
      Tester Display
      Refresh BR1

      Body Electrical > Rear Left Seat > Active Test
      Tester Display
      Refresh BR2

      Body Electrical > Rear Left Seat > Active Test
      Tester Display
      Refresh BR3

      Body Electrical > Rear Left Seat > Active Test
      Tester Display
      Refresh BR4

      Body Electrical > Rear Left Seat > Active Test
      Tester Display
      Refresh BR5

      Body Electrical > Rear Left Seat > Active Test
      Tester Display
      Refresh C1

      Body Electrical > Rear Left Seat > Active Test
      Tester Display
      Refresh C2

      Body Electrical > Rear Left Seat > Active Test
      Tester Display
      Refresh C5

      Body Electrical > Rear Left Seat > Active Test
      Tester Display
      Refresh C4

      Body Electrical > Rear Left Seat > Active Test
      Tester Display
      Refresh C3
      Result
      Proceed
      NEXT

    NEXT

    CHECK REFRESHING SEAT Click here
    CHECK REFRESHING SEAT Click here
    CHECK REFRESHING SEAT Click here