| 摘要 |
The invention enables real time diagnosis of a whole memory region without affecting engine control functions. Judgment is made as to whether an engine is in a prestart condition, or a normal operation condition (engine operating). With prestart, memory diagnosis is performed continuously over the whole region by performing diagnosis with time synchronous jobs, with each job diagnosing a number of bytes obtained from previously determined diagnosis unit bytes multiplied by a set number of cycles. With normal operation, memory diagnosis is performed with time synchronous jobs once in a plurality of cycles, by interrupting the memory being in use at predetermined periods to intermittently perform diagnosis on divided part of the memory each time.
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