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Crankshaft Position Sensor: Testing and Inspection

CRANKSHAFT POSITION SENSOR (CKPS)

INSPECTION




FUNCTION AND OPERATION PRINCIPLE
Crankshaft Position Sensor (CKPS) detects the crankshaft position and is one of the most important sensors of the engine control system. If there is no CKPS signal input, fuel is not supplied and the main relay does not operates.That is, vehicle can't run without CKPS signal. This sensor is installed on transaxle housing and generates alternating current by magnetic flux field which is made by the sensor and the target wheel which the engine rotates.The target wheel consists of 58 slot and 2 missing slots on 360 CA (Crank Angle).

Specification:




SPECIFICATION

Waveform:




WAVEFORM
This example shows a typical Crankshaft Position Sensor (CKPS) and Camshaft Position Sensor (CMPS) waveform at idle. If the 17th signal of the CKPS after missing tooth is aligned with the high signal of the CMPS at idle, PCM recognizes that Synchronization between CKPS and CMPS is completed.


Schematic Diagram:




SCHEMATIC DIAGRAM

COMPONENT INSPECTION
1. Check signal waveform of CMPS and CKPS using a scantool.

Specification: Refer to 'WAVEFORM"
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