XL-7 Plus 2WD V6-2.7L (2001)
Fuel Tank Pressure Sensor: Testing and Inspection
1. Check sensor air vent hole and pressure passage for clog. Clean if clogged.
2. Check sensor O-ring for damage and deterioration. Replace as necessary.
3. Arrange 3 new 1.5 V batteries (2) in series (check that total voltage is 4.5 - 5.0 V) and connect its positive terminal to "Vin" terminal of tank
pressure sensor (1) and negative terminal to "Ground" terminal. Then check voltage between "Out" and "Ground".
Also, check if voltage reduces when vacuum is applied up to 6.6 kPa (50 mmHg) by using vacuum pump (3) and if it increases when positive
pressure applied up to 6.6 kPa (50 mmHg) by using hand pump.
If measured voltage doesn't shown such characteristic as shown in the figure, replace.
