Chrysler 2005 Crossfire SRT6 Service Manual page 4301

25 - 8 EMISSIONS CONTROL
EVAPORATIVE VACUUM LEAK DETECTION SYSTEM
The Evaporative Vacuum Leak Detection (EVLD) system has replaced the leak detection pump as the method of
evaporative system leak detection. This is to detect a leak equivalent to a 0.5 mm (0.020 in.) hole. This system has
the capability to detect holes of this size very dependably. In addition to the detection of very small leaks, this sys-
tem has the capability of detecting medium as well as large evaporative system leaks.
The EVLD system incorporates the EVAP Purge Hoses, EVAP Canister, fuel tank, fuel filler neck and fuel filler cap
with the Charcoal Canister Shutoff Valve, EVAP Purge Solenoid, PCM and engine vacuum to detect a leak in the
purge system.
The PCM seals the Charcoal Canister Shutoff Valve and opens the EVAP Purge Solenoid to perform the 3–stage
leak test after the following conditions have been met:
• Battery voltage > 11 volts
• Engine running for approximately 16 minutes
• Engine idling
• Vehicle at rest
• Emission controls in closed loop
• Intake air temperature less than 45°C (113°F)
• Engine coolant temperature at startup < 100°C (212°F)
• Engine load < 35%
• Transmission in Drive or Reverse
• Secondary air injection not active
• Atmospheric pressure > 780 hPa (11.31 psi) i.e., altitude > 8200 feet
• Low purge canister activity
• Fuel tank level between 1/4 and 3/4
• No excessive fuel slosh in the fuel tank
• No fault in the Charcoal Canister Shutoff Valve, EVAP Purge Solenoid, or Fuel Tank Pressure Sensor
• No leak in the ORVR Pressure Relief Valve
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