Monitor Description

Fig 1: Camshaft Position Sensor And Crankshaft Position Sensor Diagram

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The ECM illuminates the MIL (2 trip detection logic) if:

When the percentage of misfire exceeds the specified limit per 1000 engine revolutions. One occurrence of excessive misfire during engine start will set the MIL. Four occurrences are required to set the MIL 1000 revolutions after engine start.

The ECM begins blinking the MIL as follows (2 trip detection logic is used and DTC is stored after 2 trip detection):

• Within 200 crankshaft revolutions at a high rpm, the threshold for "percent of misfires causing catalyst damage" is reached once.
• Within 200 crankshaft revolutions at a normal rpm, the threshold for "percent of misfires causing catalyst damage" is reached 3 times.