Crankshaft Position Sensor
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 Mitsubishi Outlander, 2003 Mitsubishi Montero Sport, 2003 Mitsubishi Montero, 2003 Mitsubishi Lancer, and 2003 Mitsubishi Galant. However, it is still accessible from the selected car via links, so may be relevant.
Using test harness, or backprobing, connect lab scope pick-up to CKP sensor connector terminal No. 2. Start engine. Compare waveform to normal waveform. See Fig 1, Fig 2 or Fig 3 . Waveform frequency should increase as engine speed is increased.