Apparatus for detecting a malfunction in a radiator fan system

摘要

A malfunction detecting apparatus of a radiator fan system includes a steady-state discrimination unit which detects whether an operating condition of an internal combustion engine is in a steady state. A temperature change measuring unit measures a change in a temperature of cooling water of the engine when the operating condition of the engine is detected to be in the steady state and a control signal to start rotation of a cooling fan of the radiator fan system is output. A malfunction detecting unit detects that a malfunction in the radiator fan system has occurred when the temperature change measured by the temperature change measuring unit is smaller than a reference value.