How to Distinguish Between Intake and Exhaust Camshafts?

[VanLucy]

Distinguishing between intake and exhaust camshafts is done as follows: Open the camshaft cover, the valve with larger clearance is the exhaust valve, and the one with smaller clearance is the intake valve. The camshaft is a component in a piston engine. Its function is to control the opening and closing of the valves. Below are the methods for testing the camshaft position sensor: 1. Unplug the connector, turn the key to the second position, and use a voltmeter to measure and confirm that the power line has voltage output. 2. Use the meter to identify the ground wire. With the voltage setting, connect one probe to the confirmed power line and the other probe to the remaining two wires. The wire that shows voltage is the ground wire, and the remaining one is the signal wire. 3. Now turn off the key, extend the signal wire, plug back the connector, start the engine, and measure between the signal wire and the ground wire to check if there is signal voltage output. The output voltage should be less than the supply voltage. 4. While performing the above steps, inspect the signal teeth on the camshaft and check for any debris between the camshaft sensor and the signal teeth, ensuring the gap is normal.