2006 Lexus ES 330FACTORY OEM SERVICE PROCEDURE

Defogger System: Inspection

  1. INSPECT DEFOGGER RELAYΒ 
    1. Inspect the defogger relay (marking: DEF) continuity. Standard:
      TERMINAL SPECIFICATION

      Terminal No. Condition Specified condition
      1<=>2 Constant Continuity
      3<=>5 Constant No continuity
      3<=>5 Apply B+ between terminals 1 and 2 Continuity

      If the continuity is not as specified, replace the relay. 2.

      Fig 1: Identifying Defogger Relay
      G02936255Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT BACK WINDOW (DEFOGGER WIRE)Β 
    NOTE:
    • When cleaning the glass, wipe the glass along the wire using a soft and dry cloth. Take care not to damage the wires.
    • Do not use detergents or glass cleaners including abrasive ingredients.
    • When measuring voltage, wrap a piece of tin foil around the tip of the negative tester probe and press the foil against the wire with your finger, as shown in the illustration.
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When to See a Mechanic

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

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

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