Diagnostic Method

When the camshaft position sensor signal is input, compare the total crankshaft position sensor signal number from occasion of previous camshaft position sensor signal input to now with crankshaft position sensor signal number at normal. Increase NG judgment counter when each number does not correspond at once. Judge NG when each number does not correspond sequentially (NG counter >= 32). Judge OK and clear NG when the crankshaft position sensor signal number corresponds (NG counter = 0).

Judgment Value 

Fig 1: Threshold Value Table

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1. Time Needed for Diagnosis:  10 revs.
2. Malfunction Indicator Light Illumination:  Illuminates as soon as malfunction occurs.