SHACMAN Fuel Level Sensor Dz93189551021

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SHACMAN Fuel Level Sensor Dz93189551021

Key Function: It utilizes the change in resistance caused by a float rising and falling with the fuel level to convert the real-time remaining fuel quantity in the tank into an electrical signal. This signal is transmitted to the dashboard (fuel gauge) or the vehicle's telematics terminal for fuel consumption monitoring and anti-theft alerts.

Key Technical Specifications and Materials
1. Body Materials: The guide rod is made of stainless steel, while the float is constructed from high-density polyurethane (PU) material that is resistant to diesel corrosion.
2. Connector Pins: Features a standard sealed connector designed for multi-wire harnesses; it offers excellent water resistance, dust resistance, and vibration resistance, preventing signal flickering caused by vehicle jolts.
3. Physical Configuration: A long sensor of the straight-rod sliding-resistor or reed-switch type; its length is precisely matched to the depth of the factory-installed aluminum alloy fuel tank (e.g., 300L, 400L, 600L, etc.).

Common Faults and Diagnostic Methods
1. Inaccurate or Erratic Fuel Gauge Readings: The gauge shows half a tank despite a recent fill-up, or the needle fluctuates wildly while driving. This is often caused by poor fuel quality leading to carbon buildup or wear on the internal resistor wiper contact surface, resulting in poor electrical contact.
2. Gauge Stuck at Zero / Constant Low-Fuel Warning: The needle remains fixed at zero, and the low-fuel warning light stays on continuously. This indicates an internal open circuit in the sensor, or that the float is jammed by fuel waxing or impurities, preventing it from rising with the fuel level.
3. Simple Diagnostic Procedure: During maintenance, remove the sensor from the fuel tank, connect a multimeter set to the resistance (Ω) range, and manually move the float up and down. If the resistance value does not change smoothly and continuously-but instead shows breaks or signs of sticking-the sensor is damaged and requires complete replacement.

DETAILS

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