Canister Purge Solenoid: Testing and Inspection

Purge Control System Flow Check
1. Disconnect the purge hose from the evaporative emission (EVAP) canister, and connect the special tool (purge flow indicator) between the EVAP canister and the purge hose.
2. The vehicle should be prepared as follows before the inspection and adjustment.
- Engine coolant temperature: 8O - 95°C (176 - 203°F)
- Lights, cooling fan and accessories: OFF
- Transaxle: Neutral (All for P range)
3. Run the engine at idle for 3 minutes or more.
4. Check the purge flow volume when sudden braking is carried out several times.

Standard value: Momentarily 20 cu.cm/sec. (2.5 SCFH) or more

5. If the purge flow volume is less than the standard value, check it again with the vacuum hose disconnected from the EVAP canister.
If the purge flow volume is below the standard values, check for blockages in the vacuum port and vacuum hose, and also check the evaporative emission purge solenoid and the purge control valve.
If the purge flow volume is at the standard value, replace the EVAP canister.




Purge Port Vacuum Check
1. Disconnect the vacuum hose from the throttle body purge vacuum nipple and connect a hand vacuum pump to the nipple.




2. Vacuum is kept constant despite the increased engine speed.

NOTE: If no vacuum is generated, the throttle body purge port may be clogged.

Evaporative Emission Purge Solenoid Check

NOTE: When disconnecting the vacuum hose, place an identification mark on it for proper re-connection.




1. Disconnect the vacuum hose from the solenoid valve.
2. Disconnect the harness connector.
3. Connect a hand vacuum pump to nipple (A) of the solenoid valve.




4. Check airtightness by applying a vacuum with voltage applied directly from the battery to the purge control solenoid valve.




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

Standard value: 36 - 44 Ohms [at 20°C (68°F)]