REAR POWER SEAT CONTROL SYSTEM, Diagnostic DTC:B2650

DTC Code DTC Name
B2650 Slide Sensor Malfunction

DESCRIPTION

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

DTC Code DTC Detection Condition Trouble Area
B2650 Sensor's forward and backward lock detection position is the same

  • Position control ECU

  • Rear No. 1 seat adjuster assembly

  • Rear No. 2 seat adjuster assembly

  • Harness or connector

WIRING DIAGRAM

A01H1XOE12

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK FOR DTC


    1. DTC output area check


      1. Using the intelligent tester, determine the area that output the DTC.

        Result
        Result Proceed to
        B2650 output from rear left seat ECU A
        B2650 output from rear right seat ECU B

    B

    PERFORM ACTIVE TEST USING INTELLIGENT TESTER (POWER SEAT MOTOR FUNCTION) Click here

    A

  2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (POWER SEAT MOTOR FUNCTION)


    1. Select the Active Test, use the intelligent tester to generate a control command, and then check the power seat motor function.

      Rear Left Seat
      Tester Display Test Part Control Range Diagnostic Note
      Seat Slide Operation Seat sliding operation Front / OFF / Rear -
      OK
      Motor operates normally.

    NG

    INSPECT REAR NO. 2 SEAT ADJUSTER ASSEMBLY (POWER SEAT MOTOR) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU LH - REAR POWER SEAT MOTOR LH)


    1. A01H1H2E06

      Disconnect the f43 ECU connector.

    2. Disconnect the f33 motor connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      f43-17 (PVCC) - f33-8 (PVCC) Always Below 1 Ω
      f43-5 (SSRS) - f33-6 (SSRS) Always Below 1 Ω
      f43-23 (SGND) - f33-7 (GND) Always Below 1 Ω
      f43-17 (PVCC) - Body ground Always 10 kΩ or higher
      f43-5 (SSRS) - Body ground Always 10 kΩ or higher
      f43-23 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK REAR NO. 2 SEAT ADJUSTER ASSEMBLY (POSITION CONTROL SENSOR)


    1. A01H1TOE01

      Disconnect the f33 motor connector.

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      f33-8 (PVCC) - f33-7 (GND) Slide switch ON 7.2 to 8.8 V
      Result
      Result Proceed to
      OK A
      NG (except Ottoman) B
      NG (for Ottoman) C

    B

    REPLACE POSITION CONTROL ECU LH Click here

    C

    REPLACE POSITION CONTROL ECU LH Click here

    A

  5. CHECK REAR NO. 2 SEAT ADJUSTER ASSEMBLY (POSITION CONTROL SENSOR)


    1. A01GW42E04

      Reconnect the f33 motor connector.

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      f33-6 (SSRS) - Body ground Slide switch ON 0 to 8 V
      Result
      Result Proceed to
      OK A
      NG (except Ottoman) B
      NG (for Ottoman) C

    B

    REPLACE REAR NO. 2 SEAT ADJUSTER ASSEMBLY Click here

    C

    REPLACE REAR NO. 2 SEAT ADJUSTER ASSEMBLY Click here

    A

  6. CHECK FOR DTC


    1. Clear the DTC Click here.

    2. Recheck for DTC.

      OK
      DTC B2650 is not output.
      Result
      Result Proceed to
      OK A
      NG (except Ottoman) B
      NG (for Ottoman) C

    B

    REPLACE POSITION CONTROL ECU LH Click here

    C

    REPLACE POSITION CONTROL ECU LH Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  7. INSPECT REAR NO. 2 SEAT ADJUSTER ASSEMBLY (POWER SEAT MOTOR)


    1. A01H1KZE06

      Check operation of the power seat motor (slide motor).


      1. Check if the seat adjuster moves smoothly when the battery is connected to the slide motor connector terminals.

        OK
        Measurement Condition Operational Direction

        Battery positive (+) → 13

        Battery negative (-) → 9

        		 Forward

        Battery positive (+) → 9

        Battery negative (-) → 13

        		 Backward
        Result
        Result Proceed to
        OK A
        NG (except Ottoman) B
        NG (for Ottoman) C

    B

    REPLACE REAR NO. 2 SEAT ADJUSTER ASSEMBLY Click here

    C

    REPLACE REAR NO. 2 SEAT ADJUSTER ASSEMBLY Click here

    A

  8. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU LH - REAR POWER SEAT MOTOR LH)


    1. A01H28NE04

      Disconnect the f24 ECU connector.

    2. Disconnect the f33 motor connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      f24-3 (SLD+) - f33-13 (FWD) Always Below 1 Ω
      f24-8 (SLD-) - f33-9 (BACK) Always Below 1 Ω
      Result
      Result Proceed to
      OK (except Ottoman) A
      OK (for Ottoman) B
      NG C

    B

    REPLACE POSITION CONTROL ECU LH Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    REPLACE POSITION CONTROL ECU LH Click here

  9. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (POWER SEAT MOTOR FUNCTION)


    1. Select the Active Test, use the intelligent tester to generate a control command, and then check the power seat motor function.

      Rear Right Seat
      Tester Display Test Part Control Range Diagnostic Note
      Seat Slide Operation Seat sliding operation Front / OFF / Rear -
      OK
      Motor operates normally.

    NG

    INSPECT REAR NO. 1 SEAT ADJUSTER ASSEMBLY (POWER SEAT MOTOR) Click here

    OK

  10. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU RH - REAR POWER SEAT MOTOR RH)


    1. A01H1H2E07

      Disconnect the f39 ECU connector.

    2. Disconnect the f16 motor connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      f39-17 (PVCC) - f16-8 (PVCC) Always Below 1 Ω
      f39-5 (SSRS) - f16-6 (SSRS) Always Below 1 Ω
      f39-23 (SGND) - f16-7 (GND) Always Below 1 Ω
      f39-17 (PVCC) - Body ground Always 10 kΩ or higher
      f39-5 (SSRS) - Body ground Always 10 kΩ or higher
      f39-23 (SGND) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. CHECK REAR NO. 1 SEAT ADJUSTER ASSEMBLY (POSITION CONTROL SENSOR)


    1. A01H1TOE02

      Disconnect the f16 motor connector.

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      f16-8 (PVCC) - f16-7 (GND) Slide switch ON 7.2 to 8.8 V
      Result
      Result Proceed to
      OK A
      NG (except Ottoman) B
      NG (for Ottoman) C

    B

    REPLACE POSITION CONTROL ECU RH Click here

    C

    REPLACE POSITION CONTROL ECU RH Click here

    A

  12. CHECK REAR NO. 1 SEAT ADJUSTER ASSEMBLY (POSITION CONTROL SENSOR)


    1. A01GW42E05

      Reconnect the f16 motor connector.

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      f16-6 (SSRS) - Body ground Slide switch ON 0 to 8 V
      Result
      Result Proceed to
      OK A
      NG (except Ottoman) B
      NG (for Ottoman) C

    B

    REPLACE REAR NO. 1 SEAT ADJUSTER ASSEMBLY Click here

    C

    REPLACE REAR NO. 1 SEAT ADJUSTER ASSEMBLY Click here

    A

  13. CHECK FOR DTC


    1. Clear the DTC Click here.

    2. Recheck for DTC.

      OK
      DTC B2650 is not output.
      Result
      Result Proceed to
      OK A
      NG (except Ottoman) B
      NG (for Ottoman) C

    B

    REPLACE POSITION CONTROL ECU RH Click here

    C

    REPLACE POSITION CONTROL ECU RH Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  14. INSPECT REAR NO. 1 SEAT ADJUSTER ASSEMBLY (POWER SEAT MOTOR)


    1. A01H1KZE07

      Check operation of the power seat motor (slide motor).


      1. Check if the seat adjuster moves smoothly when the battery is connected to the slide motor connector terminals.

        OK
        Measurement Condition Operational Direction

        Battery positive (+) → 9

        Battery negative (-) → 13

        		 Forward

        Battery positive (+) → 13

        Battery negative (-) → 9

        		 Backward
        Result
        Result Proceed to
        OK A
        NG (except Ottoman) B
        NG (for Ottoman) C

    B

    REPLACE REAR NO. 1 SEAT ADJUSTER ASSEMBLY Click here

    C

    REPLACE REAR NO. 1 SEAT ADJUSTER ASSEMBLY Click here

    A

  15. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU RH - REAR POWER SEAT MOTOR RH)


    1. A01H28NE05

      Disconnect the f4 ECU connector.

    2. Disconnect the f16 motor connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      f4-3 (SLD+) - f16-9 (FWD) Always Below 1 Ω
      f4-8 (SLD-) - f16-13 (BACK) Always Below 1 Ω
      Result
      Result Proceed to
      OK (except Ottoman) A
      OK (for Ottoman) B
      NG C

    B

    REPLACE POSITION CONTROL ECU RH Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    REPLACE POSITION CONTROL ECU RH Click here