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

DESCRIPTION


WIRING DIAGRAM

B002H5PE10

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 (for Driver Side).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    GO TO OTHER DIAGNOSTIC PROCEDURE (Front Power Seat does not Operate with Front Power Seat Switch) Click here

    OK

  2. CHECK SEAT POSITION MEMORY FUNCTION


    1. Check that the seat position memory function.

      Click here

      OK
      Seat position memory function is normal.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO OTHER DIAGNOSTIC PROCEDURE (Power Seat does not Return to Memorized Position) Click here

    OK

  3. 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 (for Driver Side) Click here

    OK

  4. INSPECT FRONT SEAT OUTER BELT ASSEMBLY (for Driver Side)


    1. Remove the front seat outer belt assembly (for Driver Side).

      Click here

    2. Inspect the front seat outer belt assembly (for Driver Side).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SEAT OUTER BELT ASSEMBLY (for Driver Side) Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY [for Driver Side] - FRONT POWER SEAT SWITCH [for Driver Side] AND BATTERY)


    • *1: for LHD

    • *2: for RHD


    1. Disconnect the Q26*1, P24*2 front seat outer belt assembly (for driver side) connector.

    2. Disconnect the g12*1 or f7*2 front power seat switch (for Driver Side) connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      Q26-2 (L) - g12-9 (RDC) Always Below 1 Ω
      Q26-2 (L) or g12-9 (RDC) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      P24-2 (L) - f7-9 (DRDC) Always Below 1 Ω
      P24-2 (L) or f7-9 (DRDC) - Body ground Always 10 kΩ or higher

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

      Standard Voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      Q26-1 (IG) - Body ground Power switch on (IG) 11 to 14 V
      Q26-1 (IG) - Body ground Power switch off Below 1 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      P24-1 (IG) - Body ground Power switch on (IG) 11 to 14 V
      P24-1 (IG) - Body ground Power switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT POWER SEAT SWITCH (for Driver Side) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. INSPECT FRONT SEAT INNER BELT ASSEMBLY (for Driver Side)


    1. Remove the front seat inner belt assembly (for Driver Side).

      Click here

    2. Inspect the front seat inner belt assembly (for Driver Side).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SEAT INNER BELT ASSEMBLY (for Driver Side) Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH [for Driver Side] - FRONT SEAT INNER BELT ASSEMBLY [for Driver Side] AND BODY GROUND)


    • *1: for LHD

    • *2: for RHD


    1. Disconnect the g12*1 or f7*2 front power seat switch (for Driver Side) connector.

    2. Disconnect the g7*1 or f11*2 front seat inner belt assembly (for Driver Side) connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      g12-10 (DBCL) - g7-1 (RDC) Always Below 1 Ω
      g12-10 (DBCL) or g7-1 (RDC) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      f7-10 (DBCL) - f11-1 (RDC) Always Below 1 Ω
      f7-10 (DBCL) or f11-1 (RDC) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE FRONT POWER SEAT SWITCH (for Driver Side) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR