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Home >> Lexus >> 2008 >> RX 400h FWD >> Repair and Diagnosis >> Body & Frame >> Seats >> Seat >> Front Power Seat Control System >> Power Seat Motor Circuit >> Inspection Procedure

Inspection Procedure

  1. PERFORM ACTIVE TEST USING TECHSTREAM 
    1. Connect Techstream (with CAN VIM) to the DLC3.
    2. Turn the ignition switch on.
    3. Perform the Active Test by following the directions on the tester screen.

      Driver Seat 

      TESTER DISPLAY REFERENCE

      Tester Display Test Part Control Range Diagnostic Note
      Seat Reclining Test detail: reclining operation
      Vehicle condition: stopped
      FRONT/REAR -
      Front Vertical Operation Test detail: front vertical operation
      Vehicle condition: stopped
      UP/DOWN -
      Lifter Operation Test detail: lifter operation
      Vehicle condition: stopped
      UP/DOWN -
      Slide Operation Test detail: sliding operation
      Vehicle condition: stopped
      UP/DOWN -

      OK: Each power seat motor operates. 

    NG: Go to step 2 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  

  2. INSPECT FRONT SEAT ADJUSTER SUB-ASSEMBLY (POWER SEAT MOTOR) 
    1. Inspect the power seat motor (See INSPECTION  ).

      OK: The power seat motor operates. 

    NG: REPLACE FRONT SEAT ADJUSTER SUB-ASSEMBLY (POWER SEAT MOTOR) 

    OK: Go to Next Step 

  3. CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU AND SWITCH ASSEMBLY - POWER SEAT MOTOR) 
    1. Disconnect the position control ECU and switch assembly connector and power seat motor connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      P33-2 (SLD+) - P38-1 Always Below 1 Ω
      P33-3 (SLD-) - P38-2 Always Below 1 Ω
      P33-4 (FRV-) - P34-2 Always Below 1 Ω
      P33-6 (FRV+) - P34-1 Always Below 1 Ω
      P33-7 (LFT+) - P35-2 Always Below 1 Ω
      P33-9 (LFT-) - P35-1 Always Below 1 Ω
      P33-8 (RCL+) - P37-2 Always Below 1 Ω
      P33-10 (RCL-) - P37-1 Always Below 1 Ω
      P33-2 (SLD+) - Body ground Always 10 kΩ or higher
      P33-3 (SLD-) - Body ground Always 10 kΩ or higher
      P33-4 (FRV-) - Body ground Always 10 kΩ or higher
      P33-6 (FRV+) - Body ground Always 10 kΩ or higher
      P33-7 (LFT+) - Body ground Always 10 kΩ or higher
      P33-9 (LFT) - Body ground Always 10 kΩ or higher
      P33-8 (RCL+) - Body ground Always 10 kΩ or higher
      P33-10 (RCL-) - Body ground Always 10 kΩ or higher
      Fig 1: Identifying Position Control ECU And Switch Assembly And Power Seat Motor Connectors
      G05281310Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE