2000-2005 Models

2009 Honda S2000 BaseSECTION 2000-2005 Models
  1. Remove the radiator fan switch from the radiator (see RADIATOR FAN SWITCH REPLACEMENT  ).
  2. Suspend the radiator fan switch (A) in a container of water as shown below.
    Fig 1: Identifying Radiator Fan Switch
    G03692538Courtesy of AMERICAN HONDA MOTOR CO., INC.
  3. Heat the water and check the temperature with a thermometer. Do not let the thermometer (B) touch the bottom of the hot container.
  4. Measure the continuity between terminal No. 1 and terminal No. 2 according to the table below.
    Fig 2: Measuring Continuity Between Terminal No. 1 & Terminal No. 2
    G03692539Courtesy of AMERICAN HONDA MOTOR CO., INC.
  5. Replace if necessary, and install the radiator fan switch (see RADIATOR FAN SWITCH REPLACEMENT  ).
RENDER: 1.0x

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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.