Civic LX Sedan L4-1590cc 1.6L SOHC MFI (1998)
Radiator Cooling Fan Motor: Description and Operation
Radiator Fan
Voltage is provided at all times to the radiator fan relay (contacts) through fuse 57. With the ignition switch in ON (II), voltage is provided to the coil of
the relay through fuse 17.
The radiator fan relay can be grounded through either the engine coolant temperature switch or the engine control module (ECM) or Powertrain Control
Module (PCM).
The engine coolant temperature switch grounds the radiator fan relay (coil) when the engine coolant temperature exceeds 199 °F (83 °C). The switch
opens when coolant temperature decreases 3 ° - 8 °C.
