Checking Purge System

Checking Purge System:

CHECKING PURGE SYSTEM

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. Battery voltage Normal condition
When applied Vacuum is released
When discontinued Vacuum is maintained




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)]

Vacuum Hose

Engine coolant temperature : 80 - 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.

Purge Port Vacuum Curve:

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 require cleaning.