Civic CX Hatchback L4-1590cc 1.6L SOHC MFI (1997)
Fuel Gauge: Description and Operation
When the ignition switch is in ON (II) or START (III), battery voltage is supplied through fuse 25 to the gauges in the gauge assembly.
Fuel Gauge
The fuel gauge has two intersecting coils wound around a permanent magnet rotor. Voltage applied to the coils, through fuse 25, generates a magnetic
field. The magnetic field, controlled by the PCM, causes the rotor to rotate and the gauge needle to move. The PCM calculates the gas quantity in the
fuel tank by using the fuel pressure value detected by the fuel tank pressure sensor and the fuel temperature value detected by the fuel tank temperature
sensor, and outputs the signal to the gauge assembly. The gauge needle moves toward the coil with the strongest magnetic field.
When you turn the ignition switch off, the gauge remains at the last reading until you turn the ignition switch to ON (II) or START (III) again. When the
PCM detects a malfunction with the fuel pressure or temperature, or detects a gas leak, the PCM reduces the fuel meter to 0.
