Fuel Tank Pressure Sensor: Testing and Inspection

NOTE: Perform the following test only when directed.

1. Inspect the fuel tank pressure sensor for damage and cracks.

2. Inspect the vacuum hose for improper routing, kinks or leaks.
- If the above are okay, perform the "Circuit Open/Short Inspection".

3. Reconnect the fuel tank pressure sensor connector.
- If the above open or short circuit are correct, replace fuel tank pressure sensor.

Circuit Open/Short Inspection

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




- Fuel tank pressure sensor connector terminal A and PCM connector 2A through common connector.
- Reference voltage circuit (Fuel tank pressure sensor connector terminal C and PCM connector terminal 21 through common connector.)
- Ground circuit (Fuel tank pressure sensor connector terminal B and PCM connector terminal 3F through common connector.)

Short circuit
- If there is continuity, the circuit is shorted. Repair or replace the harness.
- Fuel tank pressure sensor connector terminal A and PCM connector terminal 2A through common connector to ground.
- Fuel tank pressure sensor connector terminal C and PCM connector terminal 2I through common connector to ground.