FRONT POWER SEAT CONTROL SYSTEM (w/ Memory), Diagnostic DTC:B2650

DTC Code DTC Name
B2650 Slide Sensor Malfunction

DESCRIPTION

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

DTC Code DTC Detection Condition Trouble Area
B2650 The forward and backward lock detection position of the sensor is the same.

  • Position control ECU and switch assembly

  • Slide motor (Separate type front seat cushion spring assembly)

  • Wire harness or connector

WIRING DIAGRAM


  1. for LHD

    A003YJGE01

  2. for RHD

    A003YJGE05

INSPECTION PROCEDURE

PROCEDURE


  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (SLIDE MOTOR)


    1. Turn the power switch off.

    2. Connect the intelligent tester to the DLC3.

    3. Turn the power switch on (IG).

    4. Turn the intelligent tester on.

    5. Enter the following menus: Body / Driver Seat / Active Test.

    6. Perform the Active Test according to the display on the intelligent tester.

      Driver Seat (Position Control ECU and Switch Assembly)
      Tester Display Test Part Control Range Diagnostic Note
      Seat Slide Operation Seat sliding operation Front / OFF / Rear -
      OK
      Motor operates normally.

    NG

    INSPECT SLIDE MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY) Click here

    OK

  2. CHECK POSITION CONTROL ECU AND SWITCH ASSEMBLY (SLIDE MOTOR CIRCUIT)


    1. Disconnect the X1*1 or W1*2 slide motor 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 Switch Condition Specified Condition
      X1-2 - X1-3 Sliding switch on 4.8 to 5.1 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      W1-2 - W1-3 Sliding switch on 4.8 to 5.1 V

    NG

    CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY - SLIDE MOTOR) Click here

    OK

  3. CHECK SLIDE MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY)


    1. A003YSSE23
      Text in Illustration
      *A for LHD
      *B for RHD
      *a

      Component with harness connected

      (Slide Motor (Separate Type Front Seat Cushion Spring Assembly))

      Reconnect the X1*1 or W1*2 slide motor 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 Switch Condition Specified Condition
      X1-2 - Body ground Sliding switch on 4.5 to 4.8 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      W1-2 - Body ground Sliding switch on 4.5 to 4.8 V

    NG

    REPLACE SLIDE MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY) Click here

    OK

    REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY Click here

  4. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY - SLIDE MOTOR)


    1. Disconnect the X5*1 or W4*2 switch 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
      X5-5 (SSRS) - X1-2 Always Below 1 Ω
      X5-1 (SGND) - X1-3 Always Below 1 Ω
      X5-5 (SSRS) - Body ground Always 10 kΩ or higher
      X5-1 (SGND) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      W4-5 (SSRS) - W1-2 Always Below 1 Ω
      W4-1 (SGND) - W1-3 Always Below 1 Ω
      W4-5 (SSRS) - Body ground Always 10 kΩ or higher
      W4-1 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY Click here

  5. INSPECT SLIDE MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY)


    1. A003Y7FE08
      Text in Illustration
      *a

      Component without harness connected

      (Slide Motor (Separate Type Front Seat Cushion Spring Assembly))

      Disconnect the X1*1 or W1*2 slide motor connector.


      • *1: for LHD

      • *2: for RHD

    2. Check if the seat cushion spring moves smoothly when the auxiliary battery is connected to the slide motor connector terminals.

      OK
      Measurement Condition Operational Direction

      Auxiliary battery positive (+) → 4

      Auxiliary battery negative (-) → 1

      		 Seat cushion spring moves forward

      Auxiliary battery positive (+) → 1

      Auxiliary battery negative (-) → 4

      		 Seat cushion spring moves backward

    NG

    REPLACE SLIDE MOTOR (SEPARATE TYPE FRONT SEAT CUSHION SPRING ASSEMBLY) Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY - SLIDE MOTOR)


    1. Disconnect the X4*1 or W3*2 position control ECU and switch assembly 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
      X4-3 (SLD+) - X1-4 Always Below 1 Ω
      X4-4 (SLD-) - X1-1 Always Below 1 Ω
      X4-3 (SLD+) - Body ground Always 10 kΩ or higher
      X4-4 (SLD-) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      W3-3 (SLD+) - W1-4 Always Below 1 Ω
      W3-4 (SLD-) - W1-1 Always Below 1 Ω
      W3-3 (SLD+) - Body ground Always 10 kΩ or higher
      W3-4 (SLD-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE POSITION CONTROL ECU AND SWITCH ASSEMBLY Click here