Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Honda >> 2007 >> Fit Base, Standard >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heating/Air Conditioning >> Symptom Troubleshooting Index

Symptom Troubleshooting Index

SYMPTOM TROUBLESHOOTING CHART

Symptom Diagnostic procedure Also check for
Blower motor runs, but one or more speeds are inoperative Blower motor circuit troubleshooting (see BLOWER MOTOR CIRCUIT TROUBLESHOOTING )
  • Faulty blower resistor
  • Cleanliness and tightness of all connectors
Blower motor does not run at all Blower motor circuit troubleshooting (see BLOWER MOTOR CIRCUIT TROUBLESHOOTING )
  • Blown fuse No. 5 (40 A) in the under-hood fuse/relay box, and No. 10 (7.5 A) in the under-dash fuse/relay box
  • Poor ground (G402, G403) (see GROUND TO COMPONENTS INDEX )
  • Cleanliness and tightness of all connectors
Blower motor runs with the fan switch off Blower motor circuit troubleshooting (see BLOWER MOTOR CIRCUIT TROUBLESHOOTING ) Short in blower motor ground circuit
The A/C condenser fan does not run at all (but radiator fan runs with the A/C on) A/C CONDENSER FAN CIRCUIT TROUBLESHOOTING 
  • Blown fuse No. 11 (30 A) in the under-hood fuse/relay box
  • Poor ground at G301 (see GROUND TO COMPONENTS INDEX )
  • Cleanliness and tightness of all connectors
Both fans 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 
  • Blown fuse No. 10 (30 A) and No. 11 (30 A) in the under-hood fuse/relay box, and No. 10 (7.5 A) in the under-dash fuse/relay box
  • Poor ground at G301 (see GROUND TO COMPONENTS INDEX )
  • Cleanliness and tightness of all connectors
The A/C compressor clutch does not engage (but both fans run with the A/C on) A/C COMPRESSOR CLUTCH CIRCUIT TROUBLESHOOTING  Cleanliness and tightness of all connectors
A/C system does not come on (both fans and the A/C compressor do not work); heater is OK A/C PRESSURE SWITCH CIRCUIT TROUBLESHOOTING 
  • Blown fuse No. 11 (30 A) in the under-hood fuse/relay box, and No. 10 (7.5 A) in the under-dash fuse/relay box
  • Cleanliness and tightness of all connectors
Insufficient heating
  1. Check the coolant level (see COOLANT CHECK )
  2. Check the radiator cap (see RADIATOR CAP TEST )
  3. Check the operation of the air mix control cable and door (see AIR MIX CONTROL CABLE ADJUSTMENT )
  4. Check the coolant temperature
  5. Check the blower motor unit for obstructions
  6. Check for air leaks around the ducts and vents
  7. Check the inlet hose temperature
    • If it is COLD, check for restrictions in the hose, a damaged or leaking thermostat, and a damaged or leaking water pump.
    • If it is HOT, check for restrictions in the heater core. Back flush the heater core using standard commercially available equipment, or replace the heater core.
 Damaged cylinder head gasket
scientia non olet · About Mike's Workshop Manuals