2013 Lexus LS 460L AWDFACTORY OEM SERVICE PROCEDURE

DTC B2655: Cushion Length Sensor Malfunction: Procedure

  1. 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. Refer to DATA LIST / ACTIVE TEST [09/2012 - ] .
      DRIVER SEAT

      Tester Display Test Part Control Range Diagnostic Note
      Cushion Length Seat cushion length operation FRONT / REAR -

      OK

      Motor operates normally.

    NG → See step   6 

    OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - POWER SEAT MOTOR) 
    1. Disconnect the e46 switch connector.
      GTY264671Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the e65 motor connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      e46-8 (PVCC) - e65-5 (VCC) Always Below 1 Ω
      e46-20 (SSRC) - e65-2 (O/P) Always Below 1 Ω
      e46-18 (SGND) - e65-6 (GND) Always Below 1 Ω
      e46-8 (PVCC) - Body ground Always 10 kΩ or higher
      e46-20 (SSRC) - Body ground Always 10 kΩ or higher
      e46-18 (SGND) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  3. CHECK FRONT SEAT ADJUSTER ASSEMBLY LH (POSITION CONTROL SENSOR) 
    1. Disconnect the e65 motor connector.
      GTY272497Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage

      Tester Connection Switch Condition Specified Condition
      e65-5 (VCC) - e65-6 (GND) Cushion switch ON 7.2 to 8.8 V

    NG → See step   8 

    OK: Go to next step 

  4. CHECK FRONT SEAT ADJUSTER ASSEMBLY LH (POSITION CONTROL SENSOR) 
    1. Measure the voltage according to the value(s) in the table below.
      GTY419784Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage

      Tester Connection Switch Condition Specified Condition
      e65-2 (O/P) - Body ground Cushion switch ON 0 to 8 V

    NG → See step   9 

    OK: Go to next step 

  5. CHECK FOR DTC 
    1. Clear the DTC. Refer to DTC CHECK / CLEAR [09/2012 - ] .
    2. Recheck the DTC. Refer to DTC CHECK / CLEAR [09/2012 - ] .

      OK

      DTC B2655 is not output.

    NG → See step   10 

    OK → END (SYSTEM RETURNS TO NORMAL) 

  6. INSPECT FRONT SEAT ADJUSTER ASSEMBLY LH (POSITION CONTROL SENSOR) 
    1. Remove the front seat adjuster assembly LH (power seat motor assembly). Refer to REMOVAL [09/2012 - ] .
    2. Inspect the front seat adjuster assembly LH (power seat motor assembly). Refer to INSPECTION [09/2012 - ] .

    NG → See step   11 

    OK: Go to next step 

  7. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - POWER SEAT MOTOR) 
    1. Disconnect the e45 and e46 switch connectors.
      GTY266409Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the e65 motor connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Condition Specified Condition
      e46-10 (C+) - e65-3 (FWD) Always Below 1 Ω
      e45-4 (C-) - e65-4 (BACK) Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   12 

  8. REPLACE FRONT POWER SEAT SWITCH LH. Refer to  DISASSEMBLY [09/2012 - ] 
  9. REPLACE FRONT SEAT ADJUSTER ASSEMBLY LH. Refer to  DISASSEMBLY [09/2012 - ] 
  10. REPLACE FRONT POWER SEAT SWITCH LH. Refer to  DISASSEMBLY [09/2012 - ] 
  11. REPLACE FRONT SEAT ADJUSTER ASSEMBLY LH. Refer to  DISASSEMBLY [09/2012 - ] 
  12. REPLACE FRONT POWER SEAT SWITCH LH. Refer to  DISASSEMBLY [09/2012 - ] 
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  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
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  • • You are missing required tools, torque specs, or safe lifting equipment.
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