Engine cooling fan diagnosis device

Details Engine cooling fan diagnosis device Engine cooling fan diagnosis device

1995-09-18

1997-03-18

Swarthout, Brent A.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340441, 123 4112, 123 4115, 123 4131, B60Q 100

Patent

active

056126727

ABSTRACT:
A vehicle engine temperature is detected, and a radiator fan fault warning is given so as to prevent engine overheating when this temperature rises to or above a preset determining value under a predetermined test conditions. Preferably, it is determined that the radiator fan has a fault when a temperature equal to or above this determining value holds for at least a predetermined time. More preferably, this determining value is set low while the vehicle is in motion. By providing these supplementary conditions, incorrect diagnosis of a fault in the radiator fan is prevented.

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patent: 5201284 (1993-04-01), Umerhara
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