Where is the tachometer sensor located on the Volkswagen Lavida?
2 Answers
Volkswagen Lavida's tachometer sensor is located at the transmission output shaft position. Working principle of the speed sensor: It works in conjunction with a pulse wheel. The pulse wheel is a toothed disc originally designed with 60 teeth, but has two teeth missing. The pulse wheel is mounted on the crankshaft and rotates with it. When the tooth tips pass closely by the sensor's end, the ferromagnetic material of the pulse wheel cuts through the magnetic field lines of the permanent magnet inside the sensor, generating an induced voltage in the coil, which is output as a speed signal. Function of the speed sensor: The inductive speed sensor, working together with the pulse wheel, provides engine speed information and crankshaft top dead center information in distributorless ignition systems.
When it comes to the location of the Volkswagen Lavida's tachometer sensor, I know it well. It's usually installed near the crankshaft pulley at the front of the engine, within the engine compartment. If you open the hood, first locate the alternator and belt system—the sensor is mounted on a bracket nearby, secured with screws or clips. It specifically monitors the crankshaft's rotation and sends signals to the dashboard to display the RPM. In some Lavida models, the sensor might be positioned above the oil pan or next to the timing cover, depending on the engine model and year. During repairs, I often encounter issues where dust or oil buildup on the sensor causes poor contact, leading to erratic tachometer readings. In such cases, careful cleaning or sensor replacement is necessary. Regular inspections can prevent unstable power output, especially at high speeds where abnormal RPM can be dangerous.