Camshaft Sensor

CAMSHAFT SENSOR 

THEORY

As the engine management systems developed, newer processes like sequential fuel injection and variable camshaft timing was adopted. For these developments to operate the engine ECU had to calculate events on more than just crankshaft position. For sequential fuel injection the ECU had to know not only crank angle, but it had to know which if the four strokes the piston was on. Also, with the advent of variable camshaft and valve timing, the engine ECU had to be able to read the relative position of the camshaft, in relation to the crankshaft, to determine the exact dynamic cam timing. The sensors are mounted on one or more camshafts or in a camshaft-driven distributor. These sensors are usually hall effect devices, optical triggers or inductive pickup.

PROCESS

In this I checked the voltage across the cam sensor. I put the voltmeter on ac volts. Then I measured the voltage at Idle rpm and at 2500 rpm. The voltage would around 0.3V at Idle and 0.5V at 2500 rpm.

REFLECTION

The voltage reading was under the spec hence the cam sensor is working properly.