Leak Detection Sensor: Testing and Inspection

1998 Suzuki Esteem GLX Sedan Plus L4-1.6LSECTION Testing and Inspection




Fuel Tank Pressure Sensor Check
1) Remove fuel tank pressure sensor from fuel tank
2) Check sensor air vent hole and pressure passage for clog. Clean if clogged.
3) Arrange 3 new 1.5V batteries in series (check that total voltage is 4.5-5.OV) and connect its positive terminal to "Vin" terminal of sensor and negative terminal to "Ground" terminal. Then check voltage between "Vout" and "Ground."
Also, check it voltage reduces when vacuum is applied up to 6.6kPa (50mmHg) by using vacuum pump and if it increases when positive pressure applied up to 6.6kPa (50mmHg) by using hand pump.
If measured voltage doesn't show such characteristic as shown in left figure, replace.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.