Camshaft Position Sensor: Testing and Inspection

CAMSHAFT POSITION SENSOR (CMPS)

INSPECTION







FUNCTION AND OPERATION PRINCIPLE
Camshaft Position Sensor (CMPS) is a hall sensor and detects the camshaft position by using a hall element. It is related with Crankshaft Position Sensor (CKPS) and detects the piston position of each cylinder which the CKPS can't detect. The two CMPS are installed on engine head cover of bank 1 and 2 and uses a target wheel installed on the camshaft. This sensor has a hall-effect IC which output voltage changes when magnetic field is made on the IC with current flow. So the sequential injection of the 6 cylinders is impossible without CMPS signal.

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 "WAVE FORM"