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2000-2005 Models

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2009 Honda S2000, 2008 Honda S2000, 2007 Honda S2000, 2006 Honda S2000, and 2005 Honda S2000. However, it is still accessible from the selected car via links, so may be relevant.
SYMPTOM TROUBLESHOOTING TABLE

Symptom Diagnostic procedure Also check for
Engine overheats
  1. Check the coolant level
  2. Check for any engine coolant leakage (from gaskets, hoses, O-rings, etc.)
  3. Check for dirt, leaves, or insects on radiator and A/C condenser.
  4. Check for deteriorated coolant.
  5. Check for damaged or deformed fan shroud.
  6. Inspect the fan motors (see FAN MOTOR TEST ), fan relays (see POWER RELAY TEST ), or radiator fan switch (see RADIATOR FAN SWITCH TEST  ).
  7. Check the radiator cap (see RADIATOR CAP TEST ).
  9. Check for a broken drive belt (see DRIVE BELT INSPECTION ).
  10. Check the thermostat (see RADIATOR TEST ).
  11. Inspect the water pump (see WATER PUMP INSPECTION
  12. Check for plugged or deteriorated radiator hoses.
  13. Check for plugged heater core or hoses.
  14. Check for a damaged cylinder head gasket.
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The radiator fan does not run at all RADIATOR FAN CIRCUIT TROUBLESHOOTING  . Cleanliness and tightness of all connectors
The radiator fan does not run for engine cooling, but it runs with the A/C on RADIATOR FAN SWITCH CIRCUIT TROUBLESHOOTING (OPEN)  . Cleanliness and tightness of all connectors
The radiator fan runs with the ignition switch ON (II), the A/C off, and the engine coolant temperature below 199°F (93°C) RADIATOR FAN SWITCH CIRCUIT TROUBLESHOOTING (SHORT)  . Cleanliness and tightness of all connectors
The A/C condenser fan does not run at all (but the radiator fan runs with the A/C on) A/C CONDENSER FAN CIRCUIT TROUBLESHOOTING ).
Both the radiator fan and the A/C condenser fan do not run with the A/C on (but the A/C compressor runs with the A/C on) RADIATOR AND A/C CONDENSER FAN COMMON CIRCUIT TROUBLESHOOTING .
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