Honda Civic Service Manual: Fuel Tank

Fuel Pump/Fuel Gauge Sending Unit Removal and Installation (R18Z1)

Removal 1. Fuel Filler Cap 1. Remove the fuel fill cap to relieve the pressure in the fuel tank. ...

FTT Sensor Removal and Installation (R18A9)

310109 1. Vehicle Lift 1. Raise the vehicle on a lift, and make sure it is securely supported. ...

See also:

Honda Civic Owners Manual. How the System Activates
The system becomes ready to start searching for lane markings when all the following conditions are met:  The vehicle is traveling between about 45 and 90 mph (72 and 145 km/h).  The vehicle is on a straight or slightly curved road.  The turn signals are off.  The b ...