Section 426 (Ignition Switch & Key Unlock Warning Switch): Inspection

2004 Toyota Celica GT, StandardSECTION Inspection
WARNING: This page is about a different car, the 2003 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT IGNITION SWITCH CONTINUITY 
    IGNITION SWITCH CONTINUITY

    Switch position Tester connection Specified condition
    LOCK - No continuity
    ACC 1 - 3 Continuity
    ON 1 - 2 - 3
    5 - 6
    Continuity
    START 1 - 2
    4 - 5 - 6
    Continuity

    If continuity is not as specified, replace the switch.

    Fig 1: Inspecting Ignition Switch Continuity
    G03376853Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT KEY UNLOCK WARNING SWITCH CONTINUITY 
    KEY UNLOCK WARNING SWITCH CONTINUITY

    Switch position Tester connection Specified condition
    OFF (Ignition key removed) - No continuity
    ON (Ignition key set) 1 - 2 Continuity

    If continuity is not as specified, replace the switch.

    Fig 2: Inspecting Key Unlock Warning Switch Continuity
    G03376854Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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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.