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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: • Set Condition: Possible Causes EVAP PURGE SOLENOID VACUUM SUPPLY EVAP PURGE SOLENOID Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Diagnostic Test 1. ACTIVE DTC NOTE: If any of the following DTCs are set (P0443, P0452, P0453, P0498 or P0499) diagnose them first 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 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 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 POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) NOTE: Remove the vacuum pump before continuing. 9 - 434 ENGINE ELECTRICAL DIAGNOSTICS ND |