System Inspection

Engine Control
P0452 Evap. Emission System - Pressure Sensor Low Input:_:System Inspection

System Inspection

Fuel Tank Pressure Sensor Inspection
1. Ignition "ON" & Engine "OFF".
2. Disconnect the hose connecting fuel pump and FTPS.
3. Install vacuum pump in the hose at fuel pump side.
4. Apply vacuum pressure 3.75 cmHg (50 hPa) and 1.50 cmHg (20 hPa), and measure FTPS output voltage.
Specification : Voltage value will vary depending on variation in vacuum pressure
5. Is voltage within the specification?
YES
> Check for poor connection between PCM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
NO
> Check for cracks or damage in hose connecting canister and fuel pump. Repair or replace as necessary.
Check for open or short in FTPS harness. Repair as necessary.
If OK, test with a new FTPS and check for proper operation. If problem is corrected, replace FTPS and go to "Verification of Vehicle Repair" procedure