Fuel Tank Pressure Sensor: Testing and Inspection

FUEL TANK PRESSURE SENSOR INSPECTION [MZI-3.7]

Voltage Inspection

1. Remove the evaporative hose component. Service and Repair

2. Turn the ignition switch to the ON position.

3. Plug one end of the evaporative hose component and verify that the output voltage from the fuel tank pressure sensor changes when pressure is applied from the other hose end.

- If it cannot be verified even though the related harnesses have no malfunction, replace the evaporative hose component. Service and Repair
- If the monitor item status/specification (reference) is not within the specification, even though the resistance is within the specification, perform the "Circuit Open/Short Inspection".

Circuit Open/Short Inspection





1. Disconnect the negative battery cable. Removal and Replacement

2. Disconnect the fuel tank pressure sensor connector.

3. Disconnect the PCM connector.

4. Inspect the following wiring harnesses for open or short. (Continuity inspection)

Open circuit

- If there is no continuity, the circuit is open. Repair or replace the wiring harness.

- Fuel tank pressure sensor terminal A and PCM terminal 1D
- Fuel tank pressure sensor terminal B and PCM terminal 1AT
- Fuel tank pressure sensor terminal C and PCM terminal 1I

Short circuit

- If there is continuity, the circuit is shorted. Repair or replace the wiring harness.

- Fuel tank pressure sensor terminal A and body ground
- Fuel tank pressure sensor terminal B and power supply
- Fuel tank pressure sensor terminal C and power supply
- Fuel tank pressure sensor terminal C and body ground