Oscilloscope Patterns and Waveforms

Camshaft Position Sensor:

1. Connect test leads from the oscilloscope to the #2 terminal of the ECM connector and run the engine at idle speed.

Test Hookup:

Waveforms:

2. Check the waveform and compare it to the diagram shown.
3. If scope pattern is not as depicted in image, continue with the rest of the test procedures before replacing the assembly.