Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Lexus >> 2007 >> LS 460L >> Repair and Diagnosis >> Body & Frame >> Seats >> Seats - Rear Power Seat Control System >> 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 intelligent tester, determine the area that output the DTC.

        Result 

        RESULT REFERENCE

        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 BY INTELLIGENT TESTER OR TECHSTREAM (POWER SEAT MOTOR FUNCTION) 
    1. Select the ACTIVE TEST, use the intelligent tester or Techstream to generate a control command, and then check the power seat motor function.
      1. Intelligent tester

        RL-SEAT 

        INTELLIGENT TESTER - RL-SEAT

        Tester Display Test Part Control Range
        SLIDE Seat sliding operation FRONT/REAR
      2. Techstream

        Rear Left Seat 

        TECHSTREAM - REAR LEFT SEAT

        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) 
      Fig 1: Identifying f25 And f33 Connectors Terminals
      G04952516Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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 

      POSITION CONTROL ECU LH - REAR POWER SEAT MOTOR LH AND BODY GROUND

      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

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: GO TO NEXT STEP 

  4. CHECK REAR NO. 2 SEAT ADJUSTER ASSEMBLY (POSITION CONTROL SENSOR) 
      Fig 2: Identifying f33 Connector Terminals
      G04952517Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the f33 motor connector.
    2. Measure the voltage according to the values in the table below.

      Standard voltage 

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

      Tester Connection Switch Condition Specified Condition
      f33-8 (PVCC) - f33-7 (GND) Slide switch signal ON 7.2 to 8.8 V

    NG: REPLACE POSITION CONTROL ECU LH (See  DISASSEMBLY  ) 

    OK: GO TO NEXT STEP 

  5. CHECK REAR NO. 2 SEAT ADJUSTER ASSEMBLY (POSITION CONTROL SENSOR) 
      Fig 3: Identifying f33 Connector Terminal SRS
      G04952518Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Reconnect the f33 motor connector.
    2. Measure the voltage according to the value in the table below.

      Standard voltage 

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

      Tester Connection Switch Condition Specified Condition
      f33-6 (SSRS) - Body ground Slide switch signal ON 0 to 8V

    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) 
      Fig 4: Identifying Power Seat Motor Connector Terminals
      G04952519Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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 

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

        Measurement Condition Operational Direction
        Battery positive (+) → 13
        Battery negative (-) → 9        		 Forward
        Battery positive (+) → 9
        Battery negative (-) → 13        		 Backward

    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) 
    Fig 5: Identifying f24 And f33 Connectors Terminals
    G04952520Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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 

      POSITION CONTROL ECU LH - REAR POWER SEAT MOTOR LH

      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

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE POSITION CONTROL ECU LH (See  DISASSEMBLY  ) 

  9. PERFORM ACTIVE TEST BY INTELLIGENT TESTER OR TECHSTREAM (POWER SEAT MOTOR FUNCTION) 
    1. Select the ACTIVE TEST, use the intelligent tester or Techstream to generate a control command, and then check the power seat motor function.
    1. Intelligent tester

      RR-SEAT 

      INTELLIGENT TESTER - RR-SEAT

      Tester Display Test Part Control Range
      SLIDE Seat sliding operation FRONT/REAR
    2. Techstream

      Rear Right Seat 

      TECHSTREAM - REAR RIGHT SEAT

      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) 
      Fig 6: Identifying f5 And f16 Connectors Terminals
      G04952521Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the f5 ECU connector.
    2. Disconnect the f 16 motor connector.
    3. Measure the resistance according to the values in the table below.

      Standard resistance 

      POSITION CONTROL ECU RH - REAR POWER SEAT MOTOR RH AND BODY GROUND

      Tester Connection Condition Specified Condition
      f5-4(PVCC)-M6-8 (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

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: GO TO NEXT STEP 

  11. CHECK REAR NO. 1 SEAT ADJUSTER ASSEMBLY (POSITION CONTROL SENSOR) 
      Fig 7: Identifying f16 Connector Terminals
      G04952522Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the f16 motor connector.
    2. Measure the voltage according to the values in the table below.

      Standard voltage 

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

      Tester Connection Switch Condition Specified Condition
      f16-8 (PVCC) - f16-7 (GND) Slide switch signal ON 7.2 to 8.8 V

      Result 

      RESULT REFERENCE

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

    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) 
      Fig 8: Identifying f16 Connector Terminal SRS
      G04952523Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Reconnect the f 16 motor connector.
    2. Measure the voltage according to the value in the table below.

      Standard voltage 

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

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

      Result 

      RESULT REFERENCE

      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 

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

      OK: DTC B2650 is not output. 

      Result 

      RESULT REFERENCE

      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) 
    Fig 9: Identifying Power Seat Motor Connector Terminals
    G04952524Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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 

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

        Measurement Condition Operational Direction
        Battery positive (+) → 9
        Battery negative (-) → 13        		 Forward
        Battery positive (+) → 13
        Battery negative (-) → 9        		 Backward

        Result 

        RESULT REFERENCE

        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) 
      Fig 10: Identifying f4 And f16 Connectors Terminals
      G04952525Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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 

      POSITION CONTROL ECU RH - REAR POWER SEAT MOTOR RH

      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 REFERENCE

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

    B: REPLACE POSITION CONTROL ECU RH (See  DISASSEMBLY  ) 

    C: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    A: REPLACE POSITION CONTROL ECU RH (See  DISASSEMBLY  ) 

scientia non olet · About Mike's Workshop Manuals