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Home >> Lexus >> 2019 >> IS 350 Base, AWD >> Repair and Diagnosis (Single Page) >> Body & Frame >> Seats >> Front Power Seat Control System (W/ Memory) - Diagnostic Codes & Symptom Tests >> FRONT POWER SEAT CONTROL SYSTEM (w/ Memory) >> Front Power Seat does not Operate with Front Power Seat Switch [04/2013 - ] >> Procedure
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Front Power Seat does not Operate with Front Power Seat Switch [04/2013 - ]: Procedure

  1. CHECK FRONT POWER SEAT OPERATION 
    1. Check that each function of the power seat operates normally by using the front power seat switch LH.

      Refer to OPERATION CHECK [04/2013 - ]

      Result

      Result Proceed to
      All power seat functions do not operate A
      One or more power seat functions do not operate B

    Result: 

    GO TO OTHER DIAGNOSIS PROCEDURE (One or more Power Seat Motors do not Operate). Refer to  One or more Power Seat Motors do not Operate [04/2013 - ]  

    Result: 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - POWER SUPPLY) 
    1. Disconnect the b11 or b12 front power seat switch LH connectors.
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      b11-7 (+B) - Body ground Always 11 to 14 V
      b12-3 (IG) - Body ground Engine switch on (IG) 11 to 14 V
      b12-3 (IG) - Body ground Engine switch off Below 1 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS AND CONNECTOR 

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH LH - BODY GROUND) 
    1. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      b11-2 (GND) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE FRONT POWER SEAT SWITCH LH. Refer to  REMOVAL [04/2013 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS AND CONNECTOR