chrysler Workshop Repair Guides

Chrysler Workshop Service and Repair Manuals

EVAP System - Leak Detection Pump Misdiagnosis|Page 4531 > < EVAP System - Leak Detection Pump Misdiagnosis|Page 4529
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LDP AT REST (NOT POWERED)

When the LDP is at rest (no electrical/vacuum) the diaphragm is allowed to drop down if the internal (EVAP system) pressure is not greater than the
return spring. The LDP solenoid blocks the engine vacuum port and opens the atmospheric pressure port connected through the EVAP system air filter.
The vent valve is held open by the diaphragm. This allows the canister to see atmospheric pressure.

EVAP System - Leak Detection Pump Misdiagnosis|Page 4531 > < EVAP System - Leak Detection Pump Misdiagnosis|Page 4529