Fuel Tank Pressure Sensor Inspection
- Start engine and install scan tool.
- Monitor "FUEL TANK PRESSURE" parameter on the current data list with depressing increasing engine speed.
Specification: Signal value will vary between -2mmHg to 2 mmHg depending on variation in engine speed.
- Approx. 0~2 mmHg(2.5V) at Ig. On
- Approx. 0 mmHg at 1400rpm.
- Approx. -2 mmHg at 4000rpm.
- Is signal value within specification?
YES:
- Check for poor connection between ECM 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