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FRONT POWER SEAT CONTROL SYSTEM, Diagnostic DTC:B265E

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DTC Code DTC Name
B265E Headrest Front/Rear Sensor Malfunction
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DESCRIPTION

When the position control ECU assembly does not receive a sensor signal despite forward or rearward movement of the seat head rest by power seat motor operation, this DTC is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
B2654 Headrest Sensor Malfunction The forward and rearward lock detection position of the sensor is the same.

  • Position control ECU assembly

  • No. 2 Position control ECU assembly

  • Front seat headrest insert sub-assembly LH

  • Front seat headrest insert sub-assembly RH

  • Front seat headrest assembly (headrest front/ motor)

  • Harness or connector
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WIRING DIAGRAM


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  1. Figure 2. for RHD: B004VCPE04
    Figure 1. for LHD: B004VCPE03

    for Driver Seat:

  2. Figure 4. for RHD: B004VCPE06
    Figure 3. for LHD: B004VCPE05

    for Front Passenger Seat:

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CAUTION / NOTICE / HINT

Note:

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

Tip:

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

  • Before initializing the seat ECU, make sure that the D/C CUT fuse is normal.

  • When any of the following conditions are met, the seat position Information in the position control ECU assembly will be cleared.


    • The power switch is turned off with any of the seat switches being operated and the D/C CUT fuse removed.

    • The power switch is turned off within 1 second of any of the seat switches being operated with the D/C CUT fuse removed.

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PROCEDURE


  1. Click here

    CLEAR DTC


    1. Clear the DTCs.

      Click here


      1. Body Electrical > Driver Seat > Clear DTCs



      1. Body Electrical > Passenger Seat > Clear DTCs


      Result
      Proceed to
      NEXT

  2. Click here

    CHECK FOR DTC


    1. Check for DTCs.

      Click here


      1. Body Electrical > Driver Seat > Trouble Codes



      1. Body Electrical > Passenger Seat > Trouble Codes


      OK
      DTC B265E is not output.
      Result
      Result Proceed to
      DTC B265E is not output A
      DTC B265E output from "Driver Seat" B
      DTC B265E output from "Front Passenger Seat" C

  3. Click here

    PERFORM ACTIVE TEST USING GTS (HEADREST FRONT/REAR)


    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 / Active Test.

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


      1. Body Electrical > Driver Seat > Active Test
        Tester Display Measurement Item Control Range Diagnostic Note
        Headrest Front/Rear Headrest front/rear operation OFF/Rear/Front -



      1. Body Electrical > Driver Seat > Active Test
        Tester Display
        Headrest Front/Rear




      OK
      Motor operates normally.
      Result
      Proceed to
      OK
      NG

  4. Click here

    CHECK POSITION CONTROL ECU ASSEMBLY (HEADRST MOTOR CIRCUIT)


    1. for LHD:


      1. Disconnect the front seat headrest insert sub-assembly LH (headrest front/rear motor) connector.

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

        Standard Voltage
        Tester Connection Switch Condition Specified Condition
        S17-6 - S17-7 Headrest switch on 4.8 to 5.1 V

    2. for RHD:


      1. Disconnect the front seat headrest insert sub-assembly RH (headrest front/rear motor) connector.

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

        Standard Voltage
        Tester Connection Switch Condition Specified Condition
        S9-6 - S9-7 Headrest switch on 4.8 to 5.1 V
      Result
      Proceed to
      OK
      NG

  5. Click here

    CHECK FRONT SEAT HEADREST ASSEMBLY


    1. Temporarily replace the front seat headrest assembly with front passenger seat's one.

    2. Clear the DTCs.


      1. Body Electrical > Driver Seat > Clear DTCs


    3. Check for DTCs.


      1. Body Electrical > Driver Seat > Trouble Codes


      OK
      DTC B265E is not output.
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE FRONT SEAT HEADREST ASSEMBLY

    • NG

      REPLACE FRONT SEAT HEADREST INSERT SUB-ASSEMBLYClick here

  6. Click here

    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - FRONT SEAT HEADREST SUB-ASSEMBLY (HEADREST FRONT/REAR MOTOR))


    1. for LHD:


      1. Disconnect the Q28 position control ECU assembly connector.

      2. Disconnect the S17 front seat headrest assembly LH (headrest front/rear motor) connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q28-11 (SSHD) - S17-7 Always Below 1 Ω
        Q28-11 (SSHD) or S17-7 - Other terminals and body ground Always 10 kΩ or higher
        Q28-16 (SGND) - S17-6 Always Below 1 Ω

    2. for RHD:


      1. Disconnect the Q8 position control ECU assembly connector.

      2. Disconnect the S9 front seat headrest insert sub-assembly RH (headrest front/rear motor) connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q8-11 (SSHD) - S9-7 Always Below 1 Ω
        Q8-11 (SSHD) or S9-7 - Other terminals and body ground Always 10 kΩ or higher
        Q8-16 (SGND) - S9-6 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE POSITION CONTROL ECU ASSEMBLYClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. Click here

    INSPECT FRONT SEAT HEADREST ASSEMBLY (HEADREST FRONT/REAR MOTOR)


    1. Remove the front seat headrest assembly (headrest front/rear motor).

    2. Inspect the front seat headrest assembly (headrest front/rear motor).

      Click here

      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPLACE FRONT SEAT HEADREST ASSEMBLY

  8. Click here

    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY - FRONT SEAT HEADREST INSERT SUB-ASSEMBLY (HEADREST FRONT/REAR MOTOR))


    1. for LHD:


      1. Disconnect the Q25 position control ECU assembly connector.

      2. Disconnect the S17 front seat headrest isnert sub-assembly LH (headrest up/down motor) connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q25-6 (HD+) - S17-5 Always Below 1 Ω
        Q25-6 (HD+) or S17-5 - Other terminals and body ground Always 10 kΩ or higher
        Q25-3 (HD-) - S17-8 Always Below 1 Ω
        Q25-3 (HD-) or S17-8 - Other terminals and body ground Always 10 kΩ or higher

    2. for RHD:


      1. Disconnect the Q5 position control ECU assembly connector.

      2. Disconnect the S9 front seat headrest insert sub-assembly RH (headrest up/down motor) connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q5-6 (HD+) - S9-5 Always Below 1 Ω
        Q5-6 (HD+) or S9-5 - Other terminals and body ground Always 10 kΩ or higher
        Q5-3 (HD-) - S9-8 Always Below 1 Ω
        Q5-3 (HD-) or S9-8 - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE POSITION CONTROL ECU ASSEMBLYClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. Click here

    PERFORM ACTIVE TEST USING GTS (HEADREST FRONT/REAR)


    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 / Passenger Seat / Active Test.

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


      1. Body Electrical > Passenger Seat > Active Test
        Tester Display Measurement Item Control Range Diagnostic Note
        Headrest Front/Rear Headrest front/rear operation OFF/Rear/Front -



      1. Body Electrical > Passenger Seat > Active Test
        Tester Display
        Headrest Front/Rear




      OK
      Motor operates normally.
      Result
      Proceed to
      OK
      NG

  10. Click here

    CHECK NO. 2 POSITION CONTROL ECU ASSEMBLY (HEADREST MOTOR CIRCUIT)


    1. for LHD:


      1. Disconnect the front seat headrest insert sub-assembly RH (headrest front/rear motor) connector.

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

        Standard Voltage
        Tester Connection Switch Condition Specified Condition
        S9-6 - S9-7 Headrest switch on 4.8 to 5.1 V

    2. for RHD:


      1. Disconnect the front seat headrest insert sub-assembly LH (headrest front/rear motor) connector.

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

        Standard Voltage
        Tester Connection Switch Condition Specified Condition
        S17-6 - S17-7 Headrest switch on 4.8 to 5.1 V
      Result
      Proceed to
      OK
      NG

  11. Click here

    CHECK FRONT SEAT HEADREST ASSEMBLY


    1. Temporarily replace the front seat headrest assembly with driver seat's one.

    2. Clear the DTCs.


      1. Body Electrical > Driver Seat > Clear DTCs


    3. Check for DTCs.


      1. Body Electrical > Driver Seat > Trouble Codes


      OK
      DTC B265E is not output.
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE FRONT SEAT HEADREST ASSEMBLY

    • NG

      REPLACE FRONT SEAT HEADREST INSERT SUB-ASSEMBLYClick here

  12. Click here

    CHECK HARNESS AND CONNECTOR (NO. 2 POSITION CONTROL ECU ASSEMBLY - FRONT SEAT HEADREST INSERT SUB-ASSEMBLY (HEADREST UP/DOWN MOTOR))


    1. for LHD:


      1. Disconnect the Q8 No. 2 position control ECU assembly onnector.

      2. Disconnect the S9 front seat headrest insert sub-assembly RH (headrest up/down motor) connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q8-11 (SSHD) - S9-7 Always Below 1 Ω
        Q8-11 (SSHD) or S9-7- Other terminals and body ground Always 10 kΩ or higher
        Q8-16 (SGND) - S9-6 Always Below 1 Ω

    2. for RHD:


      1. Disconnect the Q28 No. 2 position control ECU assembly connector.

      2. Disconnect the S17 front seat headrest insert sub-assembly LH (headrest up/down motor) connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q28-11 (SSHD) - S17-7 Always Below 1 Ω
        Q28-11 (SSHD) or S17-7 - Other terminals and body ground Always 10 kΩ or higher
        Q28-16 (SGND) - S17-6 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE NO. 2 POSITION CONTROL ECU ASSEMBLYClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  13. Click here

    INSPECT FRONT SEAT HEADREST ASSEMBLY (HEADREST FRONT/REAR MOTOR)


    1. Remove the front seat headrest assembly (headrest front/rear motor).

    2. Inspect the front seat headrest assembly (headrest front/rear motor).

      Click here

      Result
      Proceed to
      OK
      NG

  14. Click here

    CHECK HARNESS AND CONNECTOR (NO. 2 POSITION CONTROL ECU ASSEMBLY - FRONT SEAT HEADREST INSERT SUB-ASSEMBLY (HEADREST FRONT/REAR MOTOR))


    1. for LHD:


      1. Disconnect the Q5 No. 2 position control ECU assembly connector.

      2. Disconnect the S9 front seat headrest insert sub-assembly RH (headrest front/rear motor) connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q5-6 (HD+) - S9-5 Always Below 1 Ω
        Q5-6 (HD+) or S9-5 - Other terminals and body ground Always 10 kΩ or higher
        Q5-3 (HD-) - S9-8 Always Below 1 Ω
        Q5-3 (HD-) or S9-8 - Other terminals and body ground Always 10 kΩ or higher

    2. for RHD:


      1. Disconnect the Q25 No. 2 position control ECU assembly connector.

      2. Disconnect the S17 front seat headrest insert sub-assembly LH (headrest front/rear motor) connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        Q25-6 (HD+) - S17-5 Always Below 1 Ω
        Q25-6 (HD+) or S17-5 - Other terminals and body ground Always 10 kΩ or higher
        Q25-3 (HD-) - S17-8 Always Below 1 Ω
        Q25-3 (HD-) or S17-8 - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE NO. 2 POSITION CONTROL ECU ASSEMBLYClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR