Honda Civic Service Manual: Radiator Fan

Radiator Removal and Installation (R18A9)

1. Radiator Cap 1. Wait until the engine is cool, then carefully remove the radiator cap. ...

Radiator Fan Motor Removal and Installation (Except K24Z7)

1151A2 1. Battery Terminal - Disconnection 1. Make sure the ignition switch is in LOCK (0), or the vehicle ...

See also:

Honda Civic Owners Manual. Checking the Coolant
Check the amount of coolant in the reserve tank.  If the coolant level is below the MIN mark, add the specified coolant until it reaches the MAX mark.  Inspect the cooling system for leaks. Engine Coolant WARNING Removing the reserve tank cap while the ...