P0444

TROUBLESHOOTING PROCEDURES










CIRCUIT DIAGRAM










HARNESS INSPECTION PROCEDURES


TROUBLESHOOTING HINTS
Open or short circuit is observed in purge solenoid valve (High) system when ignition switch is turned on.

EVAPORATIVE (EVAP) CANISTER PURGE SOLENOID VALVE INSPECTION




Operational Inspection

NOTE: When disconnecting the vacuum hose, make a mark on it so that it can be reconnected to its original position.

1. Disconnect the vacuum hose from the solenoid valve.
2. Detach the harness connector.




3. Connect a vacuum pump to the nipple to which the red-striped vacuum hose was connected.


4. Apply vacuum and check when voltage is applied to the evaporative emission canister purge solenoid valve and when the voltage is discontinued.







5. Verify operation is as specified above.

Resistance Inspection




6. Measure the resistance between the terminals of the solenoid valve.

EVAP Canister Purge Solenoid Valve Coil Resistance: 26 Ohms at 20°C (68°F)


Solenoid Valve Vacuum Hose Inspection


Engine coolant temperature: 8O-95°C (176-205°F)




1. Disconnect the vacuum hose from the intake manifold purge hose nipple and connect a hand vacuum pump to the nipple.




2. Start the engine and check that, after raising the engine speed by racing the engine, vacuum remains fairly constant.

NOTE: If there is no vacuum created, it is possible that the intake manifold port may be clogged and requires cleaning.