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Symptom Troubleshooting Index

SYMPTOM TROUBLESHOOTING CHART

Symptom Diagnostic procedure Also check for
Engine overheats
  1. Inspect the water pump (see WATER PUMP INSPECTION ).
  2. Check for a broken drive belt (see DRIVE BELT INSPECTION AND ADJUSTMENT ).
  3. Check the drive belt tension (see DRIVE BELT INSPECTION AND ADJUSTMENT ).
  4. Check the thermostat (see THERMOSTAT TEST ).
  5. Check for any engine coolant leakage (from gaskets, hoses, O-rings, etc.).
  6. Check for dirt, leaves, or insects on radiator and A/C condenser.
  7. Check for a damaged or deformed fan shroud.
  8. Check for plugged or deteriorated radiator hoses.
  9. Check the radiator cap (see RADIATOR CAP TEST ).
  10. Inspect the fan motors (see FAN MOTOR TEST ) or fan relays (see CONNECTOR TO FUSE/RELAY BOX INDEX ).
  11. Check for plugged heater core or hoses.
  12. Check the coolant level.
  13. Check for deteriorated coolant.
  14. Check for a damaged cylinder head gasket.
  
The radiator fan does not run at all
  1. Check for PGM-FI DTCs (see GENERAL TROUBLESHOOTING INFORMATION ).
  2. Radiator fan circuit troubleshooting (see RADIATOR FAN CIRCUIT TROUBLESHOOTING ).
 Cleanliness and tightness of all connectors
Both the radiator fan and the A/C condenser fan run with the ignition switch ON (II), the A/C off, and the engine coolant temperature below 194°F (90°C) Remove the radiator fan relay and condenser fan relay, then test.
  • If the relays are faulty, replace them.
  • If the relays are OK, check for short in the wire between the radiator fan relay 4P socket terminal No. 3 or condenser fan relay 4P socket terminal No. 3 and engine control module (ECM)/powertrain control module (PCM) connector terminal E12.
 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 (see A/C CONDENSER FAN CIRCUIT TROUBLESHOOTING ). Cleanliness and tightness of all connectors
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 (see RADIATOR AND A/C CONDENSER FAN COMMON CIRCUIT TROUBLESHOOTING ). Cleanliness and tightness of all connectors
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