A method of diagnosing a fault in a camshaft position sensor and / or a crankshaft position sensor

摘要

Process that includes: a starter engagement signal is generated to engage an engine starter; a speed of the engine is determined based on an input from a camshaft position sensor and / or a crankshaft position sensor; and selectively diagnosing an error in the camshaft position sensor and / or the crankshaft position sensor based on a rate of change in engine speed before the starter engagement signal is generated.