NVLD(Natural Vacuum Leakage Detection) is located between the
canister and the fuel tank air filter. NVLD is to detect leaks
equivalent to a 0.5 mm hole in the fuel tank, canister and hoses. When
the engine has been running, the temperature of the fuel in the fuel
tank is raised slightly. When the engine is shut off, the temperature of
the fuel should drop. The ideal gas law states that in a sealed system
the pressure drops proportionately to a drop in temperature.
[No leak]
[With 0.5mm leak]
While the engine is shut off, ECM monitors a pressure switch
that is built into the NVLD for detecting slight drop in pressure. If
the switch change is not detected after an engine shut down, it assumes
there is a leak in the sealed system.
Inspection 1. Turn the ignition switch OFF. 2. Disconnect the OCV connector. 3. Measure resistance between the OCV terminals 1 and 2. 4. Check that the resistance is within the specification. Specification: ...
Removal 1. Disconnect the battery negative cable, and wait for at least three minutes before beginning work. 2. To remove the seat belt anchor pretensioner (C), keep on pushing the lock pin (A) as arrow direction. And then remove the seat belt after pushing the lock pin (B). 3. Remove the door scuff ...