Chrysler Concorde 2004 Service Manual page 665

• Engine temperature at startup within 10 °F of
the ambient temperature
•
Fuel level less than 85%
The intrusive Medium and Large leak are con-
ducted as follows:
• De-energize the NVLD solenoid to seal the can-
ister vent.
•
Activate purge shortly after closed loop. Pull the
tank vacuum past the vacuum switch point (1
H2O vacuum) of the NVLD for a specific time
while tracking the standard purge flow rate.
GENERAL INFORMATION
• Turn purge off and determine how long it takes to
decay the tank vacuum and reopen the switch.
Determine the leak size from the time it took to
reopen the switch. Note: Fuel level is an impor-
tant determining factor.
• If the switch does not close, a more aggressive
purge flow will be applied to determine if it is a
very large leak, missing fuel cap, problem with
the NVLD device, purge flow problem, etc...
FIGURE 1
7