Camshaft Position Sensor

Operation

The camshaft position sensor functions to detect the top dead center position of the No.1 cylinder and to convert those data to pulse signals that are input to the engine control module. The engine control module, based upon those signals, calculates the sequence of fuel injection.

The power for the camshaft position sensor is supplied from the ignition switch-IG and is grounded to the vehicle body. The camshaft position sensor, by intermitting the flow (to ground) of the 5V voltage applied from the engine control module, produces pulse signals.

Troubleshooting Hints

If there is a malfunction of the camshaft position sensor, the sequential injection will not be correct, resulting in such problems as engine stalling, unstable idling, and poor acceleration.






Harness Inspection


Inspection





Using Oscilloscope

(1) Run the engine at the idle speed.
(2) Connect the probe to the oscilloscope pick-up point in the circuit diagram, and check the waveform.