REAR POWER SEAT CONTROL SYSTEM, Diagnostic DTC:B2650

DTC Code DTC Name
B2650 Slide Sensor Malfunction

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

WIRING DIAGRAM


  1. for Rear Seat RH:

    Figure 1. for LHD:

    B006AMTE35
    *a Slide Motor
    *b Position Control ECU Assembly RH
    *c Rear No. 2 Seat Adjuster Assembly

    Figure 2. for RHD:

    B006AMTE36
    *a Slide Motor
    *b Position Control ECU Assembly RH
    *c Rear No. 1 Seat Adjuster Assembly

  2. for Rear Seat LH:

    Figure 3. for LHD:

    B006AMTE37
    *a Slide Motor
    *b Position Control ECU Assembly LH
    *c Rear No. 1 Seat Adjuster Assembly

    Figure 4. for RHD:

    B006AMTE38
    *a Slide Motor
    *b Position Control ECU Assembly LH
    *c Rear No. 2 Seat Adjuster Assembly

CAUTION / NOTICE / HINT

Note

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

Tech Tips


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

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

PROCEDURE


  1. CLEAR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > Rear Right Seat > Clear DTCs
      Body Electrical > Rear Left Seat > Clear DTCs
      Result
      Proceed to
      NEXT

    NEXT

  2. 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

    A

    USE SIMULATION METHOD TO CHECK Click here

    C

    PERFORM ACTIVE TEST USING GTS (SEAT SLIDE OPERATION) Click here

    B

  3. PERFORM ACTIVE TEST USING GTS (SEAT SLIDE OPERATION)


    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. 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
      Seat Slide Operation Seat slide operation OFF/Rear/Front -

      Body Electrical > Rear Right Seat > Active Test
      Tester Display
      Seat Slide Operation
      OK
      Motor operates normally.
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT REAR SEAT ADJUSTER ASSEMBLY (SLIDE MOTOR) Click here

    OK

  4. 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

    A

    REPLACE REAR NO. 2 SEAT ADJUSTER ASSEMBLY Click here

    B

    REPLACE REAR NO. 1 SEAT ADJUSTER ASSEMBLY Click here

    C

  5. 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 RH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. 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

    B

    REPLACE REAR NO. 2 SEAT ADJUSTER ASSEMBLY Click here

    C

    REPLACE REAR NO. 1 SEAT ADJUSTER ASSEMBLY Click here

    A

  7. 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 RH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. PERFORM ACTIVE TEST USING GTS (SEAT SLIDE OPERATION)


    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 / Active Test.

    5. 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
      Seat Slide Operation

      Body Electrical > Rear Left Seat > Active Test
      Tester Display
      Seat Slide Operation
      OK
      Motor operates normally.
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT REAR SEAT ADJUSTER ASSEMBLY (SLIDE MOTOR) Click here

    OK

  9. 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

    A

    REPLACE REAR NO. 1 SEAT ADJUSTER ASSEMBLY Click here

    B

    REPLACE REAR NO. 1 SEAT ADJUSTER ASSEMBLY Click here

    C

  10. 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 LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  11. 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

    B

    REPLACE NO. 1 REAR SEAT ADJUSTER ASSEMBLY Click here

    C

    REPLACE NO. 2 REAR SEAT ADJUSTER ASSEMBLY Click here

    A

  12. 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 LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR