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REAR POWER SEAT CONTROL SYSTEM, Diagnostic DTC:B2650

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DTC Code DTC Name
B2650 Slide 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 by power seat motor operation, this DTC is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area
B2650 Slide Sensor Malfunction The forward and rearward lock detection position of the sensor is the same.

  • Position control ECU assembly LH

  • Position control ECU assembly RH

  • Rear No.1 seat adjuster assembly (slide motor)

  • Rear No. 2 seat adjuster assembly (slide motor)

  • Harness or connector
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WIRING DIAGRAM


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  1. Figure 2. for RHD: B004SB4E90
    Table 2.
    *a SENG
    *b Slide Motor
    *c Position Control ECU Assembly RH
    *d Rear No. 1 Seat Adjuster Assembly
    Figure 1. for LHD: B004SB4E88
    Table 1.
    *a SENG
    *b Slide Motor
    *c Position Control ECU Assembly RH
    *d Rear No. 2 Seat Adjuster Assembly

    for Rear Seat RH:

  2. Figure 4. for RHD: B004SB4E91
    Table 4.
    *a SENG
    *b Slide Motor
    *c Position Control ECU Assembly LH
    *d Rear No. 2 Seat Adjuster Assembly
    Figure 3. for LHD: B004SB4E89
    Table 3.
    *a SENG
    *b Slide Motor
    *c Position Control ECU Assembly LH
    *d Rear No. 1 Seat Adjuster Assembly

    for Rear Seat LH:

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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 > Rear Right Seat > Clear DTCs



      1. Body Electrical > Rear Left Seat > Clear DTCs


      Result
      Proceed to
      NEXT

  2. Click here

    CHECK FOR DTC


    1. Check for DTCs.

      Click here

      OK
      DTC B2650 is not output.
      Result
      Result Proceed to
      DTC B2650 is not output A
      DTC B2650 output from "Rear Right Seat" B
      DTC B2650 output from "Rear Left Seat" C

  3. Click here

    PERFORM ACTIVE TEST USING GTS (SEAT SLIDE OPERATION)


    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 / Rear Right Seat / Active Test.

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


      1. Body Electrical > Rear Right Seat > Active Test
        Tester Display Measurement Item Control Range Diagnostic Note
        Seat Slide Operation Seat slide operation OFF/Rear/Front -



      1. Body Electrical > Rear Right Seat > Active Test
        Tester Display
        Seat Slide Operation




      OK
      Motor operates normally.
      Result
      Proceed to
      OK
      NG

  4. Click here

    CHECK POSITION CONTROL ECU ASSEMBLY RH (SLIDE MOTOR CIRCUIT)


    1. Disconnect the front seat adjuster assembly (slide motor) connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      R1-1 - R1-4 Slide switch on 4.8 to 5.1 V
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

  5. Click here

    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY RH - REAR SEAT ADJUSTER ASSEMBLY (SLIDE MOTOR))


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

    2. Disconnect the R1 rear No. 2 seat adjuster assembly*1 or rear No. 1 seat adjuster assembly*2 (slide motor) connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R7-12 (SSRS) - R1-2 Always Below 1 Ω
      R7-12 (SSRS) or R1-2 - Other terminals and body ground Always 10 kΩ or higher
      R7-7 (SGND) - R1-3 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE POSITION CONTROL ECU ASSEMBLY RHClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. Click here

    INSPECT REAR SEAT ADJUSTER ASSEMBLY (SLIDE MOTOR)


    1. for LHD:


      1. Remove the rear No. 2 seat adjuster assembly (slide motor).

        Click here

      2. Inspect the rear No. 2 seat adjuster assembly (slide motor).

        Click here

    2. for RHD:


      1. Remove the rear No. 1 seat adjuster assembly (slide motor).

        Click here

      2. Inspect the rear No. 1 seat adjuster assembly (slide motor).

        Click here

      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

  7. Click here

    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY RH - REAR SEAT ADJUSTER ASSEMBLY (SLIDE MOTOR))


    1. Disconnect the R5 position control ECU assembly RH connector.

    2. Disconnect the R1 rear No. 2 seat adjuster assembly*1 or rear No. 1 seat adjuster assembly*2 (slide motor) connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R5-1 (SLD+) - R1-1 Always Below 1 Ω
      R5-1 (SLD+) or R1-1 - Other terminals and body ground Always 10 kΩ or higher
      R5-6 (SLD-) - R1-4 Always Below 1 Ω
      R5-6 (SLD-) or R1-4 - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE POSITION CONTROL ECU ASSEMBLY RHClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. Click here

    PERFORM ACTIVE TEST USING GTS (SEAT SLIDE OPERATION)


    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 / Rear Left Seat / Active Test.

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


      1. Body Electrical > Rear Left Seat > Active Test
        Tester Display Measurement Item Control Range Diagnostic Note
        Seat Slide Operation      



      1. Body Electrical > Rear Left Seat > Active Test
        Tester Display
        Seat Slide Operation




      OK
      Motor operates normally.
      Result
      Proceed to
      OK
      NG

  9. Click here

    CHECK POSITION CONTROL ECU ASSEMBLY LH (SLIDE MOTOR CIRCUIT)


    1. Disconnect the rear seat adjuster assembly (slide motor) connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      R35-2 - R35-3 Slide switch on 4.8 to 5.1 V
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

  10. Click here

    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY LH - REAR SEAT ADJUSTER ASSEMBLY (SLIDE MOTOR))


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

    2. Disconnect the R35 rear No. 1 seat adjuster assembly*1 or rear No. 2 seat adjuster assembly*2 (slide motor) connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R41-12 (SSRS) - R35-2 Always Below 1 Ω
      R41-12 (SSRS) or R35-2 - Other terminals and body ground Always 10 kΩ or higher
      R41-7 (SGND) - R35-3 Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE POSITION CONTROL ECU ASSEMBLY LHClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

  11. Click here

    INSPECT REAR SEAT ADJUSTER ASSEMBLY (SLIDE MOTOR)


    1. for LHD:


      1. Remove the No. 1 rear seat adjuster assembly (slide motor).

        Click here

      2. Inspect the No. 1 rear seat adjuster assembly (slide motor).

        Click here

    2. for RHD:


      1. Remove the No. 2 rear seat adjuster assembly (slide motor).

        Click here

      2. Inspect the No. 2 rear seat adjuster assembly (slide motor).

        Click here

      Result
      Result Proceed to
      OK A
      NG (for LHD) B
      NG (for RHD) C

  12. Click here

    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU ASSEMBLY LH - REAR SEAT ADJUSTER ASSEMBLY (SLIDE MOTOR))


    1. Disconnect the R39 position control ECU assembly LH connector.

    2. Disconnect the R35 No. 1 rear seat adjuster assembly*1 or No. 2 rear seat adjuster assembly*2 (slide motor) connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R39-1 (SLD+) - R35-1 Always Below 1 Ω
      R39-1 (SLD+) or R35-1 - Other terminals and body ground Always 10 kΩ or higher
      R39-6 (SLD-) - R35-4 Always Below 1 Ω
      R39-6 (SLD-) or R35-4 - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OK

      REPLACE POSITION CONTROL ECU ASSEMBLY LHClick here

    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR