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P0457-LOOSE FUEL CAP (CONTINUED) 7. NVLD SWITCH OPERATION Reconnect all vacuum hoses. Start the engine. Allow the engine to idle. Using the scan tool, perform the NVLD FORCED MONITOR TEST. Monitor the NVLD Switch. NOTE: As the test runs, the NVLD Switch should go from an OPEN state to CLOSED. After the vacuum is Did the NVLD Switch operate as described above? Yes >> Refer to the INTERMITTENT CONDITION Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING) No >> Replace the NVLD Assembly. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 9 - 466 ENGINE ELECTRICAL DIAGNOSTICS ND |