TEST ACTION APPLICABILITY
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?
All
Yes → Repair as necessary.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
No → Go To 3
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?
All
Yes → Repair the vacuum supply, hose/tube as necessary.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
No → Go To 4
4 Disconnect the vacuum supply hoses form the EVAP Purge Solenoid.
Using a hand vacuum pump, apply 10 in Hg to the 9CAN9 side of the EVAP Purge
Solenoid.
Ignition on, engine not running.
Observe the vacuum gauge.
With the DRBIIIt, actuate the EVAP Purge Solenoid .
Does the vacuum drop when the solenoid is actuated?
All
Yes → Go To 5
No → Replace the Evap Purge Solenoid.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
5 Reconnect all vacuum hoses.
Start the engine and allow it to idle.
Using the DRBIIIt, 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?
All
Yes → Refer to the INTERMITTENT CONDITION symptom in the
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER-5-NGC.
No → Go To 6
155
DRIVEABILITY - NGC
P0440-GENERAL EVAP SYSTEM FAILURE — Continued
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