Chrysler Pacifica CS 2004 Service Manual page 168

DRIVEABILITY - NGC
P0440-GENERAL EVAP SYSTEM FAILURE —
TEST
2 Perform a visual and physical inspection of the entire Evaporative Emission system.
Check for the following conditions:
- Hoses disconnected or left off
- Holes or cracks
- Loose seal points
- Evidence of damaged components
- Incorrect routing of hoses and tubes
- Fuel Cap left off or bad gasket seal
Were any of the above conditions found?
Yes → Repair as necessary.
→ Go To 3
No
3 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.
Ensure the vacuum port at the throttle body is free from any blockage.
Were any problems found?
Yes → Repair the vacuum supply, hose/tube as necessary.
→ Go To 4
No
4 Disconnect the vacuum supply hoses form the EVAP Purge Solenoid.
Using a hand vacuum pump, apply 10 in Hg to the CAN side of the EVAP Purge
Solenoid.
Ignition on, engine not running.
Observe the vacuum gauge.
With the DRBIII , actuate the EVAP Purge Solenoid .
Does the vacuum drop when the solenoid is actuated?
Yes → Go To 5
→ Replace the Evap Purge Solenoid.
No
5 Reconnect all vacuum hoses.
Start the engine and allow it to idle.
Using the DRBIII , perform the NVLD FORCED MONITOR TEST.
Monitor the NVLD Switch state.
NOTE: As the test runs, the NVLD Switch should go from an OPEN state to
CLOSED. After the vacuum is released from the EVAP system the Switch
state will return to OPEN.
Did the NVLD Switch operate as described above?
Yes → Refer to the INTERMITTENT CONDITION symptom in the
→ Go To 6
No
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Continued
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APPLICABILITY
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