Crankshaft Position Sensor: Description and Operation

Wiring Diagram:

DESCRIPTION
The crankshaft position (CKP) sensor is a magnetic generator type sensor, producing an alternating current signal which increases in both frequency and amplitude as the engine RPM increases. The crankshaft position (CKP) sensor sends this reference signal to the Engine Control Module (ECM)/Powertrain Control Module (PCM) to indicate RPM and crankshaft position. This reference signal along with the camshaft position sensor signal is used by the ECM/PCM to calculate fuel injection pulse, establish top dead center for ignition timing and where to start ignition coil and injection sequencing.

Legend

1. Crankshaft Position Sensor
2. Engine Coolant Temperature (ECT) Sensor
3. Intake Air Temperature (IAT) Sensor
4. Manifold Absolute Pressure (MAP) Sensor
5. Engine Control Module (ECM) / Powertrain Control Module (PCM)
6. Circuit Opening Relay
7. EFI-HTR Relay
8. Heated Oxygen Sensor 2(HO2S 2)
9. Oxygen Sensor (O2S)