Camshaft Position (CMP) Sensor
- Disable ignition coils. Remove CMP sensor, leave electrical connector plugged-in. Using analog voltmeter (or oscilloscope), connect negative lead to CMP sensor ground (CMP sensor body or Black/Blue wire). With voltmeter positive lead, backprobe White wire. Turn ignition on and Rotate CMP shaft. Voltmeter should indicate 4 voltage pulses (5 volts) per revolution.
- Move positive voltmeter lead to Yellow/Blue wire terminal. Rotate CMP sensor shaft. Voltmeter should indicate 2 voltage pulses (5 volts) per revolution. Replace CMP sensor if necessary.