2008 Lexus ES 350FACTORY OEM SERVICE PROCEDURE

How To Proceed With Troubleshooting

HINT:

  • Use the following procedure to troubleshoot the power window control system
  • Techstream should be used in steps  3 and  5.
  1. VEHICLE BROUGHT TO WORKSHOP 
  2. CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK 
  3. CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM 
    1. Use Techstream, inspect the LIN communication function to ensure there are no malfunctions in the communication system.

      Result 

      RESULT CHART

      Result Proceed to
      No DTCs output A
      DTCs output B

    B:  GO TO DIAGNOSTIC TROUBLE CODE CHART 

    A: Go to next step. 

  4. PROBLEM SYMPTOMS TABLE 

    HINT:

    See PROBLEM SYMPTOMS TABLE 

  5. OVERALL ANALYSIS AND TROUBLESHOOTING 
    1. DATA LIST / ACTIVE TEST (See DATA LIST / ACTIVE TEST  )
    2. CIRCUIT INSPECTION
    3. TERMINALS OF ECU (See TERMINALS OF ECU  )
  6. ADJUST, REPAIR OR REPLACE 
  7. RESET POWER WINDOW MOTOR 

    HINT:

    See INITIALIZATION 

    NEXT: END 

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.