Maxima SE V6-3.0L (VQ30DE) (1998)
Canister Purge Control Valve: Diagnostic Trouble Code Tests and Associated Procedures
DTC 0111 EVAP Control System Purge Flow Monitoring
NOTE: If both DTC P0510 and P1447 are displayed, perform TROUBLE DIAGNOSIS FOR DTC P0510 first.
EVAPORATIVE EMISSION SYSTEM DIAGRAM
SYSTEM DESCRIPTION
In this evaporative emission (EVAP) control system, purge volume is related to air intake volume and occurs during non-closed throttle conditions. In
normal purge conditions (non-closed throttle), the EVAP canister purge volume control valve and EVAP canister purge control valve are open to admit
purge flow. Purge flow exposes the EVAP control system pressure sensor to intake manifold vacuum.
ON BOARD DIAGNOSIS LOGIC
In normal conditions (non-closed throttle), if the sensor output does not show the appropriate pressure drop in the EVAP purge line, lack of purge flow is
indicated, and a fault is determined.
DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE
CAUTION: Always drive vehicle at a safe speed.
NOTE: If "DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE" has been previously conducted, always turn ignition switch "OFF"
and wait at least 5 seconds before conducting the next test.
TESTING CONDITION:
This test may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road test is expected to be easier, it is unnecessary to lift
the vehicle.
Always perform test at a temperature of 5°C (41°F) or more.
OVERALL FUNCTION CHECK
Use this procedure to check the overall monitoring function of the EVAP control system purge flow. During this check, a 1st trip DTC might not be
confirmed.