2003 Lexus SC 430FACTORY OEM SERVICE PROCEDURE

Lighting System: Inspection

WARNING: This page is about a different car, the 2004 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.
  1. MAP LAMP ASSY 
    1. Inspect map light assy continuity.
      1. Check that the continuity between terminals at each switch position, as shown in CONTINUITY TABLE  .
    CONTINUITY TABLE

    Switch operation Tester connection Specified condition
    OFF 1(B)-2(E),1(B)-3(CTY) No continuity
    DOOR 1 (B) - 3(CTY) Continuity
    ON 1(B)-2(E) Continuity
    Fig 1: Identifying MAP Lamp Connector
    G03479580Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. VANITY LAMP ASSY 
    1. Inspect vanity light continuity.
      1. Check that the continuity exists between terminals 1 and 2, when light is operated.

    Standard: 

    • OFF (closed): No continuity 
    • ON (opened): Continuity 
  3. GLOVE BOX LAMP SWITCH 
    1. Inspect glove box switch continuity.
      1. Check that the continuity exists between terminals 1 and 2, when switch is operated.

    Standard: 

    • ON (when shaft is pressed): No continuity 
    • OFF (when shaft is not pressed): Continuity 
  4. GLOVE BOX LAMP ASSY 
    1. Check that the continuity exists between terminal.

    Standard: Continuity exists 

  5. RETAINER FRONT DOOR SCUFF PLATE 
    1. Check that the continuity exists between terminal.

    Standard: Continuity exists 

Factory Service Tools

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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.