EVAP Canister Purge Volume Control Solenoid Valve For California

P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Description






The EVAP canister purge volume control solenoid valve uses a ON/
OFF duty to control the flow rate of fuel vapor from the EVAP canister. The EVAP canister purge volume control solenoid valve is moved by ON/OFF pulses from the ECM. The longer the ON pulse, the greater the amount of fuel vapor that will flow through the valve.


DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. CONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm battery voltage is more than 11 V at idle.
- GO TO 2.

2. PERFORM DTC CONFIRMATION PROCEDURE

1.Start engine and let it idle for at least 13 seconds.
2.Check 1st trip DTC.
Is 1st trip DTC detected?
YES- Go to "Diagnosis Procedure".
NO- INSPECTION END


Diagnosis Procedure


1. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect EVAP canister purge volume control solenoid valve harness connector.
3.Turn ignition switch ON.





4.Check the voltage between EVAP canister purge volume control solenoid valve harness connector and ground.






Is the inspection result normal?
YES- GO TO 3.
NO- GO TO 2.

2. DETECT MALFUNCTIONING PART

Check the following.
- Junction block E44
- Harness connectors E11, F2
- 15A fuse (No.42)
- Harness for open or short between EVAP canister purge volume control solenoid valve and IPDM E/R
- Harness for open or short between EVAP canister purge volume control solenoid valve and ECM
- Repair open circuit or short to ground or short to power in harness or connectors.

3. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT

FOR OPEN AND SHORT
1.Turn ignition switch OFF.
2.Disconnect ECM harness connector.
3.Check the continuity between EVAP canister purge volume control solenoid valve harness connector and ECM harness connector.





4.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES-1- With CONSULT: GO TO 4.
YES-2- Without CONSULT: GO TO 5.
NO- Repair open circuit or short to ground or short to power in harness or connectors.

4. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION

With CONSULT
1.Reconnect all harness connectors disconnected.
2.Start engine.
3.Perform "PURGE VOL CONT/V" in "ACTIVE TEST" mode with CONSULT. Check that engine speed varies according to the valve opening.
Is the inspection result normal?
YES- GO TO 6.
NO- GO TO 5.

5. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to "Component Inspection".
Is the inspection result normal?
YES- GO TO 6.
NO- Replace EVAP canister purge volume control solenoid valve. Service and Repair.

6. CHECK INTERMITTENT INCIDENT

Intermittent Incident.
- INSPECTION END


Component Inspection


1. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

With CONSULT
1.Turn ignition switch OFF.
2.Reconnect all harness connectors disconnected.
3.Disconnect EVAP purge hoses connected to EVAP canister purge volume control solenoid valve.
4.Turn ignition switch ON.
5.Select "PURGE VOL CONT/V" in "ACTIVE TEST" mode with CONSULT.





6.Touch "Qd" and "Qu" on CONSULT screen to adjust "PURGE
VOL CONT/V" opening and check air passage continuity of
EVAP canister purge volume control solenoid valve under the following conditions.





Without CONSULT
1.Turn ignition switch OFF.
2.Disconnect EVAP canister purge volume control solenoid valve harness connector.
3.Disconnect EVAP purge hoses connected to EVAP canister purge volume control solenoid valve.
4.Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace EVAP canister purge volume control solenoid valve. Service and Repair.