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Home › Lexus › 2009 › LS 460 AWD › Repair and Diagnosis › Body & Frame › Seats › Seat › Rear Power Seat Control System › DTC B2650 Slide Sensor Malfunction › Inspection Procedure

Inspection Procedure

  1. CHECK FOR DTC 
    1. DTC output area check
      1. Using the Techstream, determine the area that output the DTC.

        Result 

        RESULT CHART

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

        B:  Go to step  9

        A: Go to next step 

  2. PERFORM ACTIVE TEST USING TECHSTREAM (POWER SEAT MOTOR FUNCTION) 
    1. Select the Active Test, use the Techstream to generate a control command, and then check the power seat motor function.

      Rear Left Seat 

      TESTER DISPLAY REFERENCE

      Tester Display Test Part Control Range
      Seat Slide Operation Seat sliding operation FRONT/REAR

      OK: 

      Motor operates normally. 

      NG:  Go to step  7

      OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU LH - REAR POWER SEAT MOTOR LH AND BODY GROUND) 
    1. Disconnect the f25 ECU connector.
    2. Disconnect the f33 motor connector.
    3. Measure the resistance according to the values in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      f25-4 (PVCC) - f33-8 (PVCC) Always Below 1 Ω
      f25-10 (SSRS) - f33-6 (SSRS) Always Below 1 Ω
      f25-12 (SGND) - f33-7 (GND) Always Below 1 Ω
      f25-4 (PVCC) - Body ground Always 10 kΩ or higher
      f25-10 (SSRS) - Body ground Always 10 kΩ or higher
      f25-12 (SGND) - Body ground Always 10 kΩ or higher
      Fig 1: Checking Harness And Connector (Position Control ECU LH - Rear Power Seat Motor LH And Body Ground)
      G04952516Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to next step 

  4. CHECK REAR NO. 2 SEAT ADJUSTER ASSEMBLY (POSITION CONTROL SENSOR) 
    1. Disconnect the f33 motor connector.
    2. Measure the voltage according to the values in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      f33-8 (PVCC) - f33-7 (GND) Slide switch signal ON 7.2 to 8.8 V
      Fig 2: Identifying F33 Motor Connector Terminals
      G06194226Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPLACE POSITION CONTROL ECU LH (See  DISASSEMBLY   ) 

      OK: Go to next step 

  5. CHECK REAR NO. 2 SEAT ADJUSTER ASSEMBLY (POSITION CONTROL SENSOR) 
    1. Reconnect the f33 motor connector.
    2. Measure the voltage according to the value in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      f33-6 (SSRS) - Body ground Slide switch signal ON 0 to 8 V
      Fig 3: Identifying F33 Motor Connector Terminals
      G04952518Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPLACE REAR NO. 2 SEAT ADJUSTER ASSEMBLY (See  REMOVAL   ) 

      OK: Go to next step 

  6. CHECK FOR DTC 
    1. Clear the DTC (see DTC CHECK/CLEAR  ).
    2. Recheck the DTC.

      OK: 

      DTC B2650 is not output. 

      NG: REPLACE POSITION CONTROL ECU LH (See  DISASSEMBLY   ) 

      OK: END (SYSTEM RETURN TO NORMAL) 

  7. CHECK REAR NO. 2 SEAT ADJUSTER ASSEMBLY (POWER SEAT MOTOR) 
    1. 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 CHART

        Measurement Condition Operational Direction
        Battery positive (+) → 13
        Battery negative (-) → 9        		 Forward
        Battery positive (+) → 9
        Battery negative (-) → 13        		 Backward
        Fig 4: Identifying Rear No. 2 Seat Adjuster Connector Terminals
        G04952519Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        NG: REPLACE REAR NO. 2 SEAT ADJUSTER ASSEMBLY (See  REMOVAL   ) 

        OK: Go to next step 

  8. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU LH - REAR POWER SEAT MOTOR LH) 
    1. Disconnect the f24 ECU connector.
    2. Disconnect the f33 motor connector.
    3. Measure the resistance according to the value in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      f24-1 (SLD+) - f33-13 (FWD) Always Below 1 Ω
      f24-6 (SLD-) - f33-9 (BACK) Always Below 1 Ω
      Fig 5: Checking Harness And Connector (Position Control ECU LH - Rear Power Seat Motor LH)
      G04952520Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: REPLACE POSITION CONTROL ECU LH (See  DISASSEMBLY   ) 

  9. PERFORM ACTIVE TEST USING TECHSTREAM (POWER SEAT MOTOR FUNCTION) 
    1. Select the Active Test, use the Techstream to generate a control command, and then check the power seat motor function.

      Rear Right Seat 

      TESTER DISPLAY REFERENCE

      Tester Display Test Part Control Range
      Seat Slide Operation Seat sliding operation FRONT/REAR

      OK: 

      Motor operates normally. 

      NG:  Go to step  14

      OK: Go to next step 

  10. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU RH - REAR POWER SEAT MOTOR RH AND BODY GROUND) 
    1. Disconnect the f5 ECU connector.
    2. Disconnect the f16 motor connector.
    3. Measure the resistance according to the values in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      f5-4 (PVCC) - f16-8 (PVCC) Always Below 1 Ω
      f5-10 (SSRS) - f16-6 (SSRS) Always Below 1 Ω
      f5-12 (SGND) - f16-7 (GND) Always Below 1 Ω
      f5-4 (PVCC) - Body ground Always 10 kΩ or higher
      f5-10 (SSRS) - Body ground Always 10 kΩ or higher
      f5-12 (SGND) - Body ground Always 10 kΩ or higher
      Fig 6: Checking Harness And Connector (Position Control ECU RH - Rear Power Seat Motor RH And Body Ground)
      G04952521Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      OK: Go to next step 

  11. CHECK REAR NO. 1 SEAT ADJUSTER ASSEMBLY (POSITION CONTROL SENSOR) 
    1. Disconnect the f 16 motor connector.
    2. Measure the voltage according to the values in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      M6-8 (PVCC) - M6-7 (GND) Slide switch signal ON 7.2 to 8.8 V

      Result 

      RESULT CHART

      Result Proceed to
      OK A
      NG (w/o Ottoman) B
      NG (w/ Ottoman) C
      Fig 7: Identifying F16 Motor Connector Terminals
      G04952522Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      B: REPLACE POSITION CONTROL ECU RH (See  DISASSEMBLY   ) 

      C: REPLACE POSITION CONTROL ECU RH (See  DISASSEMBLY   ) 

      A: Go to next step 

  12. CHECK REAR NO. 1 SEAT ADJUSTER ASSEMBLY (POSITION CONTROL SENSOR) 
    1. Reconnect the f16 motor connector.
    2. Measure the voltage according to the value in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      f16-6 (SSRS) - Body ground Slide switch signal ON 0 to 8 V

      Result 

      RESULT CHART

      Result Proceed to
      OK A
      NG (w/o Ottoman) B
      NG (w/ Ottoman) C
      Fig 8: Identifying F16 Motor Connector Terminals
      G04952523Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      B: REPLACE REAR NO. 1 SEAT ADJUSTER ASSEMBLY (See  REMOVAL   ) 

      C: REPLACE REAR NO. 1 SEAT ADJUSTER ASSEMBLY (See  REMOVAL   ) 

      A: Go to next step 

  13. CHECK FOR DTC 
    1. Clear the DTC (see DTC CHECK/CLEAR  ).
    2. Recheck the DTC.

      OK: 

      DTC B2650 is not output. 

      Result 

      RESULT CHART

      Result Proceed to
      DTC B2650 is not output A
      DTC B2650 is output (w/o Ottoman) B
      DTC B2650 is output (w/ Ottoman) C

      B: REPLACE POSITION CONTROL ECU RH (See  DISASSEMBLY   ) 

      C: REPLACE POSITION CONTROL ECU RH (See  DISASSEMBLY   ) 

      A: END (SYSTEM RETURN TO NORMAL) 

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

        Measurement Condition Operational Direction
        Battery positive (+) → 9
        Battery negative (-) → 13        		 Forward
        Battery positive (+) → 13
        Battery negative (-) → 9        		 Backward
        Fig 9: Identifying Rear No. 1 Seat Adjuster Connector Terminals
        G04952524Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Result 

        RESULT CHART

        Result Proceed to
        OK A
        NG (w/o Ottoman) B
        NG (w/ Ottoman) C

        B: REPLACE REAR NO. 1 SEAT ADJUSTER ASSEMBLY (See  REMOVAL   ) 

        C: REPLACE REAR NO. 1 SEAT ADJUSTER ASSEMBLY (See  REMOVAL   ) 

        A: Go to next step 

  15. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU RH - REAR POWER SEAT MOTOR RH) 
    1. Disconnect the f4 ECU connector.
    2. Disconnect the f 16 motor connector.
    3. Measure the resistance according to the values in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      f4-1 (SLD+) - f16-9 (FWD) Always Below 1 Ω
      f4-6 (SLD-) - f16-13 (BACK) Always Below 1 Ω

      Result 

      RESULT CHART

      Result Proceed to
      OK (w/o Ottoman) A
      OK (w/ Ottoman) B
      NG C
      Fig 10: Checking Harness And Connector (Position Control ECU RH - Rear Power Seat Motor RH)
      G04952525Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      B: REPLACE POSITION CONTROL ECU RH (See  DISASSEMBLY   ) 

      C: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      A: REPLACE POSITION CONTROL ECU RH (See  DISASSEMBLY   ) 

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