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(11) | EP 1 350 951 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Apparatus and method for detecting fault in glow plug |
(57) In method and apparatus for detecting a fault in a glow plug provided in a diesel
engine, a possibility of a fault in the glow plug is determined without utilizing
a forced change in the state of energization of the glow plug for the purpose of diagnosis,
before the presence of a fault in the glow plug is determined by utilizing the forced
change in the state of energization of the glow plug. The process of determining the
presence of the fault is not executed if it is determined in the process of determining
the possibility of the fault that there is no possibility of a fault in the glow plug.
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