FRONT POWER SEAT CONTROL SYSTEM(w/ Memory) Power Seat Power Easy Access System Function does not Operate

DESCRIPTION


WIRING DIAGRAM

A011PXBE07

CAUTION / NOTICE / HINT

Note


  • The front power seat control system (w/ Memory) uses the CAN communication system. First, confirm that there is no malfunction in the CAN communication system. Refer to the How to Proceed with Troubleshooting procedure.

    Click here

  • Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.

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

Tech Tips

When troubleshooting a function, first make sure that the function is set to the default setting.

Click here

PROCEDURE


  1. CHECK FRONT POWER SEAT OPERATION


    1. Check that each function of the power seat operates normally by using the front power seat switch (driver seat).

      Click here

      Result
      Result Proceed to
      Power seat functions operate normally A
      All power seat functions do not operate B
      One or more power seat motors do not operate C

    B

    GO TO OTHER FLOW CHART (Front Power Seat does not Operate with Front Power Seat Switch) Click here

    C

    GO TO OTHER FLOW CHART (One or more Power Seat Motors do not Operate) Click here

    A

  2. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the power 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.


      Body Electrical > Driver Seat > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Driver Seat Buckle SW Driver seat belt buckle switch ON or OFF

      ON: Driver seat belt fastened

      OFF: Driver seat belt unfastened

      		 -

      Body Electrical > Driver Seat > Data List
      Tester Display
      Driver Seat Buckle SW
      OK
      On the GTS screen, the item changes between ON and OFF according to the above.
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT FRONT SEAT INNER BELT ASSEMBLY (DRIVER SEAT) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY (DRIVER SEAT) - IG POWER SUPPLY)


    1. Disconnect the Q20*1, P11*2 front seat outer belt 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
      for LHD
      Tester Connection Condition Specified Condition
      Q20-1 (IG) - Body ground Power switch on (IG) 11 to 14 V
      Q20-1 (IG) - Body ground Power switch off Below 1 V
      for RHD
      Tester Connection Condition Specified Condition
      P11-1 (IG) - Body ground Power switch on (IG) 11 to 14 V
      P11-1 (IG) - Body ground Power switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY (DRIVER SEAT) - FRONT POWER SEAT SWITCH (DRIVER SEAT))


    1. Disconnect the b12*1 or a7*2 front power seat switch (driver seat) connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      Q20-2 (L) - b12-9 (RDC) Always Below 1 Ω
      Q20-2 (L) - Body ground Always 10 kΩ or higher
      b12-9 (RDC) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      P11-2 (L) - a7-9 (DRDC) Always Below 1 Ω
      P11-2 (L) - Body ground Always 10 kΩ or higher
      a7-9 (DRDC) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  5. CHECK SEAT BELT TENSION REDUCER SYSTEM


    1. Check the seat belt tension reducer system.

      Click here

      OK
      Seat belt tension reducer system is normal.
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SEAT OUTER BELT ASSEMBLY (DRIVER SEAT) Click here

    OK

  6. REPLACE FRONT POWER SEAT SWITCH (DRIVER SEAT)


    1. Temporarily replace the front power seat switch (driver seat) with a new or known good one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  7. CHECK POWER SEAT POWER EASY ACCESS SYSTEM


    1. Check the power seat easy access system.

      Click here

      OK
      Power seat power easy access system is normal.
      Result
      Proceed to
      OK
      NG

    OK

    END (FRONT POWER SEAT SWITCH (DRIVER SEAT) WAS DEFECTIVE)

    NG

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

  8. INSPECT FRONT SEAT INNER BELT ASSEMBLY (DRIVER SEAT)


    1. Remove the front seat inner belt assembly (driver seat).

      Click here

    2. Inspect the front seat inner belt assembly (driver seat).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SEAT INNER BELT ASSEMBLY (DRIVER SEAT) Click here

    OK

  9. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH (DRIVER SEAT) - FRONT SEAT INNER BELT ASSEMBLY (DRIVER SEAT))


    1. Disconnect the b12*1 or a7*2 front power seat switch (driver seat) connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      b12-10 (DBCL) - b11-1 (RDC) Always Below 1 Ω
      b12-10 (DBCL) - Body ground Always 10 kΩ or higher
      b11-1 (RDC) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      a7-10 (DBCL) - a11-1 (RDC) Always Below 1 Ω
      a7-10 (DBCL) - Body ground Always 10 kΩ or higher
      a11-1 (RDC) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT POWER SEAT SWITCH (DRIVER SEAT) Click here

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR