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Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR DTC 
    1. DTC output area check
      1. Using the intelligent tester or Techstream, determine the area that output the DTC

        Result 

    RESULT REFERENCE

    Result Proceed to
    B2650 output from driver seat ECU A
    B2650 output from passenger seat ECU B

    B:  Go to step  9

    A: Go to Next Step 

  2. PERFORM ACTIVE TEST USING 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

        D-SEAT 

        D-SEAT REFERENCE

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

        Driver Seat 

    DRIVER SEAT REFERENCE

    Tester Display Test Part Control Range
    Seat Slide Operation Seat sliding operation Front / OFF / Rear

    OK: Motor operates normally 

    NG:  Go to step  7

    OK: Go to Next Step 

  3. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - FRONT POWER SEAT POSITION SENSOR LH) 
    1. Disconnect the e46 switch connector.
    2. Disconnect the e36 sensor connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

    TESTER CONNECTION / SPECIFIED CONDITION CHART

    Tester Connection Condition Specified Condition
    e46-8 (PVCC) - e36-3 (VCC) Always Below 1 Ω
    e46-23 (SSRS) - e36-1 (O/P) Always Below 1 Ω
    e46-18 (SGND) - e36-2 (GND) Always Below 1 Ω
    e46-8 (PVCC) - Body ground Always 10 kΩ or higher
    e46-23 (SSRS) - Body ground Always 10 kΩ or higher
    e46-18 (SGND) - Body ground Always 10 kΩ or higher
    Fig 1: Identifying E46 Switch And E36 Sensor Connectors
    G05784798Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  4. CHECK FRONT SEAT ADJUSTER ASSEMBLY LH (POSITION CONTROL SENSOR) 
    1. Disconnect the e36 sensor connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

    TESTER CONNECTION / SPECIFIED CONDITION CHART

    Tester Connection Condition Specified Condition
    e36-3 (VCC) - e36-2 (GND) Sliding switch signal ON 7.2 to 8.8 V
    Fig 2: Identifying Terminals Of E36 Sensor Connector
    G05784799Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE FRONT POWER SEAT SWITCH LH  (See DISASSEMBLY )

    OK: Go to Next Step 

  5. CHECK FRONT SEAT ADJUSTER ASSEMBLY LH (POSITION CONTROL SENSOR) 
    1. Reconnect the e36 sensor connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

    TESTER CONNECTION / SPECIFIED CONDITION CHART

    Tester Connection Condition Specified Condition
    e36-1 (O/P) - Body ground Sliding switch signal ON 0 to 8 V
    Fig 3: Identifying Terminals Of E36 Sensor Connector
    G05784800Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE FRONT SEAT ADJUSTER ASSEMBLY LH  (See DISASSEMBLY )

    OK: Go to Next Step 

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

      OK: DTC B2650 is not output. 

      NG: REPLACE FRONT POWER SEAT SWITCH LH  (See DISASSEMBLY )

      OK: USE SIMULATION METHOD TO CHECK  (See HOW TO PROCEED WITH TROUBLESHOOTING )

  7. CHECK FRONT SEAT ADJUSTER ASSEMBLY LH (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 (+) → 2
    Battery negative (-) → 1    		 Forward
    Battery positive (+) → 1
    Battery negative (-) → 2    		 Backward
    Fig 4: Identifying Terminals Of Power Seat Motor Connector
    G05784801Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE FRONT SEAT ADJUSTER ASSEMBLY LH  (See DISASSEMBLY )

    OK: Go to Next Step 

  8. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - POWER SEAT MOTOR) 
    1. Disconnect the e46 switch connector.
    2. Disconnect the e37 motor connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

    TESTER CONNECTION / SPECIFIED CONDITION CHART

    Tester Connection Condition Specified Condition
    e46-12 (SLD+) - e37-2 Always Below 1 Ω
    e46-11 (SLD-) - e37-1 Always Below 1 Ω
    Fig 5: Identifying E46 Switch And E37 Motor Connectors
    G05784802Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE FRONT POWER SEAT SWITCH LH  (See DISASSEMBLY )

  9. PERFORM ACTIVE TEST USING 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

        P-SEAT 

        P-SEAT REFERENCE

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

        Passenger Seat 

    PASSENGER SEAT REFERENCE

    Tester Display Test Part Control Range Diagnostic Note
    Seat Slide Operation Seat sliding operation Front / OFF / Rear -

    OK: Motor operates normally 

    NG:  Go to step  14

    OK: Go to Next Step 

  10. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH RH - FRONT POWER SEAT POSITION SENSOR RH) 
    1. Disconnect the e20 switch connector.
    2. Disconnect the e5 sensor connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

    TESTER CONNECTION / SPECIFIED CONDITION CHART

    Tester Connection Condition Specified Condition
    e20-8 (PVCC) - e5-3 (VCC) Always Below 1 Ω
    e20-23 (SSRS) - e5-1 (O/ P) Always Below 1 Ω
    e20-18 (SGND) - e5-2 (GND) Always Below 1 Ω
    e20-8 (PVCC) - Body ground Always 10 kΩ or higher
    e20-23 (SSRS) - Body ground Always 10 kΩ or higher
    e20-18 (SGND) - Body ground Always 10 kΩ or higher
    Fig 6: Identifying E20 Switch And E5 Motor Connectors
    G05784803Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  11. CHECK FRONT SEAT ADJUSTER ASSEMBLY RH (POSITION CONTROL SENSOR) 
    1. Disconnect the e5 sensor connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

    TESTER CONNECTION / SPECIFIED CONDITION CHART

    Tester Connection Condition Specified Condition
    e5-3 (VCC) - e5-2 (GND) Sliding switch signal ON 7.2 to 8.8 V
    Fig 7: Identifying Terminals Of E5 Sensor Connector
    G05784804Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE FRONT POWER SEAT SWITCH RH  (See DISASSEMBLY )

    OK: Go to Next Step 

  12. CHECK FRONT SEAT ADJUSTER ASSEMBLY RH (POSITION CONTROL SENSOR) 
    1. Reconnect the e5 sensor connector.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage 

    TESTER CONNECTION / SPECIFIED CONDITION CHART

    Tester Connection Condition Specified Condition
    e5-1 (O/P) - Body ground Sliding switch signal ON 0 to 8 V
    Fig 8: Identifying Terminals Of E5 Sensor Connector
    G05784805Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE FRONT SEAT ADJUSTER ASSEMBLY RH  (See DISASSEMBLY )

    OK: Go to Next Step 

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

      OK: DTC B2650 is not output. 

      NG: REPLACE FRONT POWER SEAT SWITCH RH  (See DISASSEMBLY )

      OK: USE SIMULATION METHOD TO CHECK  (See HOW TO PROCEED WITH TROUBLESHOOTING )

  14. CHECK FRONT SEAT ADJUSTER ASSEMBLY RH (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 

    TERMINALS REFERENCE CHART

    Measurement Condition Operational Direction
    Battery positive (+) → 1
    Battery negative (-) → 2    		 Forward
    Battery positive (+) → 2
    Battery negative (-) → 1    		 Backward
    Fig 9: Identifying Terminals Of Power Seat Motor Connector
    G05784806Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE FRONT SEAT ADJUSTER ASSEMBLY RH  (See DISASSEMBLY )

    OK: Go to Next Step 

  15. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH RH - POWER SEAT MOTOR) 
    1. Disconnect the e20 switch connector.
    2. Disconnect the e6 motor connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

    TESTER CONNECTION / SPECIFIED CONDITION CHART

    Tester Connection Condition Specified Condition
    e20-12 (SLD+) - e6-1 Always Below 1 Ω
    e20-11 (SLD-) - e6-2 Always Below 1 Ω
    Fig 10: Identifying Terminals Of E20 Switch And E6 Sensor Connectors
    G05784807Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE FRONT POWER SEAT SWITCH RH  (See DISASSEMBLY )

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