Camshaft Position Sensor

Operation

The camshaft position sensor detects the top dead center on the compression stroke of the No.1 cylinder, converts it into a pulse signal and inputs it to the engine control module. The engine control module determines the fuel injection sequence based on this signal.

Power to the camshaft position sensor is supplied from the ignition switch (IG), and the ground is located in the engine control module. A 5V Voltage is applied from the engine control module to the camshaft position sensor output terminal, and the camshaft position sensor generates a pulse signal as it switches from OPEN to SHORT (power transistor inside the sensor switches ON/OFF) between the output terminal and the ground.


Troubleshooting

Hint 1: If the camshaft position sensor is defective, proper sequential injection will not occur, so the engine will stall, or unstable idling and poor acceleration will occur.

Hint 2: When the camshaft position sensor outputs a pulse signal when the ignition switch is turned to ON (without starting the engine), the camshaft position sensor or engine control module is probably defective.





Harness Inspection




Using Oscilloscope