LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2013 >> LX 570 >> Repair and Diagnosis (Single Page) >> Body & Frame >> Seats >> Front Power Seat Control System (Diagnostic Codes & Symptom Tests) >> Front Power Seat Control System >> Power Seat Power Easy Access System Function does not Operate >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Power Seat Power Easy Access System Function does not Operate: 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. Refer to OPERATION CHECK [01/2012 - ] .

      OK

      Each function of power seat operates normally by using seat switches.

    NG → See step   7 

    OK: Go to next step 

  2. READ VALUE USING TECHSTREAM (BUCKLE SWITCH) 
    1. Using the Techstream, check the Data List for proper functioning of the seat buckle switch.
      DRIVER SEAT

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Driver Seat Buckle SW Status of the driver seat belt / ON or OFF ON: Tongue plate engaged
      OFF: Tongue plate not engaged      		 -

      OK

      On tester screen, each item changes between ON and OFF according to above chart.

    NG → See step   5 

    OK: Go to next step 

  3. REPLACE FRONT POWER SEAT SWITCH LH 
    1. Replace the front power seat switch. Refer to DISASSEMBLY [01/2012 - ] .

    NEXT: Go to next step 

  4. CHECK POWER SEAT POWER EASY ACCESS SYSTEM 
    1. Check that the power seat power easy access system operates normally when engaging and disengaging the tongue plate of the seat belt with the shift lever in P. Refer to OPERATION CHECK [01/2012 - ] .

      OK

      Power seat power easy access system is normal.

    NG → REPLACE MAIN BODY ECU 

    OK → END (FRONT POWER SEAT SWITCH LH WAS DEFECTIVE) 

  5. INSPECT FRONT SEAT INNER BELT ASSEMBLY LH 
    1. Remove the front seat inner belt assembly. Refer to REMOVAL [01/2012 - ] .
      GTY397021Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      5 (RDC) - 4 (E) Seat belt fastened Below 1 Ω
      5 (RDC) - 4 (E) Seat belt unfastened 10 kΩ or higher

    NG → See step   8 

    OK: Go to next step 

  6. CHECK HARNESS AND CONNECTOR (FRONT POWER SEAT SWITCH - FRONT SEAT INNER BELT AND BODY GROUND) 
    1. Disconnect the c50 front power seat switch connector.
      GTY398465Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the c22*1 or c46*2 front seat inner belt connector.
      • *1: w/ Climate Control Seat System
      • *2: w/o Climate Control Seat System
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      W/ CLIMATE CONTROL SEAT SYSTEM

      Tester Connection Condition Specified Condition
      c50-4 (DBCL) - c22-5 (RDC) Always Below 1 Ω
      c22-4 (E) - Body ground Always Below 1 Ω
      W/O CLIMATE CONTROL SEAT SYSTEM

      Tester Connection Condition Specified Condition
      c50-4 (DBCL) - c46-5 (RDC) Always Below 1 Ω
      c46-4 (E) - Body ground Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   9 

  7. GO TO PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [01/2012 - ] 
  8. REPLACE FRONT SEAT INNER BELT ASSEMBLY LH. Refer to  REMOVAL [01/2012 - ] 
  9. REPLACE FRONT POWER SEAT SWITCH LH. Refer to  DISASSEMBLY [01/2012 - ] 
scientia non olet · About LEMON Manuals