2000-2005 Models

Remove the radiator fan relay from the main under-hood fuse/relay box, and test it (see POWER RELAY TEST ).
Is the relay OK?
1. YES - Go to step 2.
2. NO - Replace the radiator fan relay.
Remove the radiator fan switch, and test it (see RADIATOR FAN SWITCH TEST ).
Is the radiator fan switch OK?
1. YES - Go to step 3.
2. NO - Replace the radiator fan switch.
Disconnect engine control module (ECM) connector A (32P) and the under-hood fuse/relay box 16P connector.
Check for continuity between the radiator fan switch 2P connector terminal No. 2 and body ground.
Is there continuity?
1. YES - Repair a short in the wire between the radiator fan switch 2P connector terminal No. 2 and main under-hood fuse/relay box.
2. NO - Replace the main under-hood fuse/relay box.
Fig 1: Checking Continuity Between Radiator Fan Switch 2P Connector Terminal No. 2 & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.