Where are the five Nissan Trent crankshaft position sensors? The position sensor of 05 Nissan Trent crankshaft is located behind the engine block, above the right axle ball cage and below the exhaust pipe, and covered with an iron cover. Crankshaft position sensor is one of the most important sensors in engine electronic control system. It provides ignition timing (ignition advance angle) and signal to determine crankshaft position, and is used to check piston top dead center, crankshaft angle and engine speed. The following is the relevant form of crankshaft sensor: 1. The magnetic pulse crankshaft position sensor is installed behind the pulley at the front end of the crankshaft, and there is a thin circular toothed disc (called signal disc) with fine teeth at the rear end of the pulley, which is installed on the crankshaft together with the pulley and rotates with the crankshaft; 2. The photoelectric crankshaft position sensor is installed in the distributor and consists of a signal generator and a signal disk with notches and light holes. With the help of LED as signal source, it runs with the rotor. When the light-emitting hole is aligned with the LED, light irradiates the phototransistor to generate an electrical signal, which is amplified by the amplifier circuit and transmitted to the ECU. 3. Based on the principle of Hall effect, Hall crankshaft position sensor generates voltage pulse signal corresponding to crankshaft angle. It changes the magnetic field intensity passing through the Hall element by triggering blades or gear teeth, and then causes the Hall element to generate a pulsed Hall voltage signal, which is the output signal of the crankshaft position sensor after amplification and shaping.