Dodge Durango (HB). Manual — part 869
P0441-EVAP PURGE SYSTEM PERFORMANCE
HB
ENGINE ELECTRICAL DIAGNOSTICS
9 - 475
P0441-EVAP PURGE SYSTEM PERFORMANCE (CONTINUED)
For the Engine circuit diagram (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS).
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
Cold start test. Engine Running. Small Leak Test Passed.
•
Set Condition:
The PCM activates the EVAP Purge solenoid gradually increases to maximum flow. During flow, the PCM
looks for the NVLD switch to close. If the PCM does not see the NVLD switch close at maximum flow an error
is detected. Two Trip Fault. Three good trips to turn off the MIL.
Possible Causes
EVAP PURGE SOLENOID VACUUM SUPPLY
EVAP PURGE SOLENOID
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING).
Diagnostic Test
1.
ACTIVE DTC
NOTE: If any of the following DTCs are set (P0443, P0452, P0453, P0498 or P0499) diagnose them first
before continuing with P0441.
Ignition on, engine not running.
With a scan tool, read DTCs.
Is the DTC active at this time?
Yes
>> Go To 2
No
>> Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
2.
CHECKING EVAP PURGE SOLENOID FUNCTIONALITY
NOTE: After disconnecting the Evap Purge vacuum connections, inspect the lines and solenoid for any
signs of contamination or foreign materials.
Using a hand vacuum pump, apply 10 in Hg to
9
CAN
9
side of the EVAP Purge Solenoid.
Ignition on, engine not running.
Observe the vacuum gauge.
With the scan tool, actuate the EVAP Purge Solenoid.
Does the vacuum drop when the solenoid is actuated?
Yes
>> Go To 3
No
>> Replace the Evap Purge Solenoid.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
NOTE: Remove the vacuum pump before continuing.
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ENGINE ELECTRICAL DIAGNOSTICS
HB
P0441-EVAP PURGE SYSTEM PERFORMANCE (CONTINUED)
3.
EVAP VACUUM SUPPLY HOSE INSPECTION
Turn the ignition off.
Carefully inspect the Evap Purge Solenoid vacuum supply hose for proper routing.
Check for a pinched or plugged hose from the throttle body to the Purge Solenoid.
Inspect the vacuum port at the throttle body for any damage or plugging.
Were any problems found?
Yes
>> Repair the vacuum supply hose/tube as necessary.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
HB
ENGINE ELECTRICAL DIAGNOSTICS
9 - 477
P0442-EVAP PURGE SYSTEM MEDIUM LEAK
9 - 478
ENGINE ELECTRICAL DIAGNOSTICS
HB
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