2005 Lexus GX 470FACTORY OEM SERVICE PROCEDURE

How To Proceed With Troubleshooting

HINT:

Troubleshoot in accordance with the procedures on the following references.

  1. VEHICLE BROUGHT TO WORKSHOP 
    1. Go to next step.
  2. CUSTOMER PROBLEM ANALYSIS CHECK AND SYMPTOM CHECK (See  CUSTOMER PROBLEM ANALYSIS CHECK   ) 
    1. Go to next step.
  3. DTC CHECK (See  DIAGNOSTIC TROUBLE CODE TABLE  ) 
    1. Check for DTCs and make a note of the code that is output.
    2. Delete the DTC.
    3. Check if the DTC is output once again when the problem symptom is simulated based on the noted code.
      1. With an output of the code, proceed to  A.
      2. Without an output of the code, proceed to  B.
    1. Go to step   6 . 
    2. Go to next step. 
  4. See  PROBLEM SYMPTOMS TABLE  
    1. Go to next step.
  5. PERFORM TROUBLESHOOTING 
    1. See PRE-CHECK 
    2. (See CIRCUIT DESCRIPTION - DTC B1221: POWER WINDOW SWITCH CIRCUIT ON DRIVER DOOR  - CIRCUIT DESCRIPTION - REMOTE UP/DOWN FUNCTION DOES NOT OPERATE  )
    1. Go to next step.
  6. ADJUST, REPAIR OR REPLACE 
    1. Go to next step.
  7. RESET POWER WINDOW MOTOR 
    1. If any of the power window switch illuminations is blinking, reset the power window for the switch with the blinking illumination.
      1. Turn the ignition switch ON.
      2. Open the door glass.
      3. Fully pull up the power window switch until the door glass is fully closed.
      4. Continue to hold the switch 1 second or more even after the door glass is fully closed.
      5. Check that the AUTO UP/DOWN function operates completely.
    1. 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.

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