Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSHONDA2002CIVIC SIREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 167 (HEATING/AIR CONDITIONING)SYMPTOM TROUBLESHOOTING INDEX
2002 Honda Civic Si
Symptom Troubleshooting Index
2002 Honda Civic SiSECTION Symptom Troubleshooting Index
WARNING: This page is about a different car, the 2006 Honda Odyssey and 2005 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.
SYMPTOM TROUBLESHOOTING INDEX
| Symptom | Diagnostic procedure | Also check for |
|---|---|---|
| Recirculation control doors do not change between Fresh and Recirculate | Recirculation control motor circuit troubleshooting (see RECIRCULATION CONTROL MOTOR CIRCUIT TROUBLESHOOTING ) |
|
| Blower, heater controls, and A/C do not work | A/C control power and ground circuit troubleshooting (see A/C CONTROL POWER AND GROUND CIRCUIT TROUBLESHOOTING ) |
|
| Both fans do not run at low speed with the A/C on (but the A/C compressor runs with the A/C on) | Radiator and A/C condenser fan low speed circuit troubleshooting (see RADIATOR AND A/C CONDENSER FAN LOW SPEED CIRCUIT TROUBLESHOOTING ) |
|
| The A/C condenser fan does not run at high speed (but both fans run at low speed and the A/C compressor operates with the A/C on) | A/C condenser fan high speed circuit troubleshooting (see A/C CONDENSER FAN HIGH SPEED CIRCUIT TROUBLESHOOTING ) |
|
| Both fans do not run at high speed with the A/C on (but both fans run at low speed and the A/C compressor operates with the A/C on) | Radiator and A/C condenser fan high speed circuit troubleshooting (see RADIATOR AND A/C CONDENSER FAN HIGH SPEED CIRCUIT TROUBLESHOOTING ) |
|
| The A/C compressor clutch does not engage (but both fans run with the A/C on) | A/C compressor clutch circuit troubleshooting (see A/C COMPRESSOR CLUTCH CIRCUIT TROUBLESHOOTING ) |
|
| 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 (see A/C PRESSURE SWITCH CIRCUIT TROUBLESHOOTING ) |
|
| Blower fan runs slower than expected in cold weather | ECT Troubleshooting: ECT sensor 1 circuit low voltage (see DTC P0117: ECT SENSOR 1 CIRCUIT LOW VOLTAGE
), ECT sensor 1 circuit high voltage (see DTC P0118: ECT SENSOR 1 CIRCUIT HIGH VOLTAGE
)
NOTE:
It is normal for the blower to run slowly until the engine coolant temperature begins to rise. If the blower continues to run slowly for an abnormal length of time, continue to troubleshoot the problem.
|
|
| Both fans run at high speed all the time with the A/C on | Radiator and A/C condenser fan high speed circuit troubleshooting (see RADIATOR AND A/C CONDENSER FAN HIGH SPEED CIRCUIT TROUBLESHOOTING ) |
|
RENDER: 1.0x
NO RELATED
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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.