Camshaft Position Sensor

The camshaft position sensor is located in distributor. This Hall Effect type sensor works in conjunction with engine speed signal of crankshaft position sensor providing PCM with inputs necessary to establish and maintain proper fuel injector firing order.

When leading edge of pulse ring enters the sync signal generator on the camshaft position sensor, the resulting change in the magnetic field causes a 5-volt reference signal to be induced. On 4-cylinder engines, this indicates to the PCM that piston No. 4 will be the next piston at Top Dead Center (TDC). On 6-cylinder engine, it indicates that piston No. 3 will be at TDC.

When trailing edge of pulse ring leaves the sync signal generator on the camshaft position sensor, the resulting collapse of the magnetic field causes reference signal to drop to zero volts. On 4-cylinder engines, this indicates that piston No. 1 will be the next piston at TDC. On 6-cylinder engine, it indicates that piston No. 4 will be at TDC.