Remove the condenser fan relay, and test it, refer to the '01 Civic Shop Manual on this CD (see page 22-80). Is the relay OK? YES – Go to step 2. NO – Replace the relay. Disconnect radiator fan switch B 2P connector and turn the ignition switch ON (II). Does the radiator fan stop? YES – Replace radiator fan switch B and recheck. NO – Go to step 3. Turn the ignition switch OFF. Remove the radiator fan relay from the multi-relay box. Check for continuity between radiator fan switch B 2P connector terminal No. 1 and body ground. RADIATOR FAN MOTOR 2P CONNECTOR Wire side of female terminals Is there continuity? YES – Repair a short in the wire between radiator fan relay 4P socket terminal No. 4, radiator fan switch B 2P connector terminal No. 1 and A/C pressure switch. NO – Go to step 6. Disconnect the radiator fan switch A 2P connector and turn the ignition switch ON (II). Does the radiator fan stop? YES – Replace radiator fan switch A. NO – Repair a short in the wire between radiator fan relay 4P socket terminal No. 4, condenser fan relay 4P socket terminal No. 4.

Remove the radiator fan relay from the multi-relay box and condenser fan relay from the under-hood fuse/relay box. Disconnect the radiator fan switch B 2P connector. Turn the ignition switch ON (II). Measure the voltage between radiator fan switch B 2P connector terminal No. 1 and body ground. RADIATOR FAN SWITCH B 2P CONNECTOR Wire side of female terminals Is there the battery voltage? YES – Go to step 5. NO – Repair an open in the wire between fan control relay 5P socket terminal No. 1 and radiator fan switch B terminal No. 1. Install the radiator fan relay and condenser fan relay. aaa