Circuit Description

Camshaft Position (CMP) sensor is mounted on top of engine block at rear of valley cover. CMP works in conjunction with CMP reluctor (1X). Reluctor is located on inside engine, immediately in front of rear cam bearing. CMP sensor is used to determine whether a cylinder is on a firing or exhaust stroke. As camshaft rotates, reluctor wheel interrupts a magnetic field produced by magnet inside sensor. Sensor produces signal sent to PCM. PCM uses 1X signal along with CKP sensor 24X signal to determine crankshaft position and stroke. A slightly longer cranking time may be a symptom of this DTC. Conditions for setting DTC:

• Ignition voltage is 5-17 volts.
• Engine speed is less than 4000 RPM.
• PCM detects CMP-to-CKP mismatch has occurred for 10 seconds.