P0443
P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Description
SYSTEM DESCRIPTION
This system controls flow rate of fuel vapor from the EVAP canister. The opening of the vapor by-pass passage in the EVAP canister purge volume control solenoid valve changes to control the flow rate. The EVAP
canister purge volume control solenoid valve repeats ON/OFF operation according to the signal sent from the
ECM. The opening of the valve varies for optimum engine control. The optimum value stored in the ECM is determined by considering various engine conditions. When the engine is operating, the flow rate of fuel vapor from the EVAP canister is regulated as the air flow changes.
COMPONENT DESCRIPTION
The EVAP canister purge volume control solenoid valve is used 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.
On Board Diagnosis Logic
DTC Confirmation Procedure
Perform PROCEDURE FOR MALFUNCTION A first.
If the DTC cannot be confirmed, perform PROCEDURE FOR MALFUNCTION B.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.
PROCEDURE FOR MALFUNCTION A
TESTING CONDITION:
- Perform "DTC Confirmation Procedure" when the fuel level is between 1/4 and 3/4 full, and vehicle is placed on flat level surface.
- Always perform test at a temperature of 5 to 60�C (41 to 140�F).
- Cool the vehicle so that engine coolant temperature becomes same level as ambient temperature.
With CONSULT
1.Turn ignition switch ON and select "DATA MONITOR" mode with CONSULT.
2.Check that the following condition are met.
FUEL T/TMP SE: 0 - 35�C (32 - 95�F)
3.Start engine and wait at least 60 seconds.
4.Check 1st trip DTC.
5.If 1st trip DTC is detected, go to Diagnosis Procedure (see below).
With GST
1.Turn ignition switch ON.
2.Set voltmeter probes to ECM terminal 107 (FTT sensor signal)
and ground.
3.Check that the voltage is 3.1 - 4.2 V.
4.Start engine and wait at least 60 seconds.
5.Check 1st trip DTC.
6.If 1st trip DTC is detected, go to Diagnosis Procedure (see below).
PROCEDURE FOR MALFUNCTION B
NOTE:
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:
Always perform test at a temperature of 5�C (41�F) or more.
With CONSULT
1.Start engine and warm it up to normal operating temperature.
2.Turn ignition switch OFF and wait at least 10 seconds.
3.Turn ignition switch ON.
4.Select "PURG VOL CN/V P1444" of "EVAPORATIVE SYSTEM" in "DTC WORK SUPPORT" mode with CONSULT.
5.Touch "START".
6.Start engine and let it idle until "TESTING" on CONSULT changes to "COMPLETED". (It will take approximately 10 seconds.)
If "TESTING" is not displayed after 5 minutes, retry from step 2.
7.Check that "OK" is displayed after touching "SELF-DIAG RESULTS". If "NG" is displayed, Diagnosis Procedure (see below).
With GST
1.Start engine and warm it up to normal operating temperature.
2.Turn ignition switch OFF and wait at least 10 seconds.
3.Start engine and let it idle for at least 20 seconds.
4.Select Service $07 with GST.
5.If 1st trip DTC is detected, go to Diagnosis Procedure (see below).
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 voltage between EVAP canister purge volume control solenoid valve terminal 2 and ground with CONSULT or tester.
Voltage: Battery voltage
OK or NG
OK- GO TO 3.
NG- GO TO 2.
2. DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E2, F32
- 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 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 harness continuity between ECM terminal 45 and EVAP canister purge volume control solenoid valve terminal 1. Refer to Wiring Diagram.
Continuity should exist.
4.Also check harness for short to ground and short to power.
OK or NG
OK- GO TO 4.
NG- Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR
1.Disconnect EVAP control system pressure sensor harness connector.
2.Check connectors for water.
Water should not exist.
OK or NG
OK- GO TO 5.
NG- Replace EVAP control system pressure sensor. Service and Repair.
5. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
P0452.
OK or NG
OK (With CONSULT)-GO TO 6.
OK (Without CONSULT)-GO TO 7.
NG- Replace EVAP control system pressure sensor. Service and Repair.
6. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT
1.Turn ignition switch OFF.
2.Reconnect harness connectors disconnected.
3.Start engine.
4.Perform "PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT. Check that engine speed varies according to the valve opening.
OK or NG
OK- GO TO 8.
NG- GO TO 7.
7. CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
.
OK or NG
OK- GO TO 8.
NG- Replace EVAP canister purge volume control solenoid valve. Exploded View.
8. CHECK RUBBER TUBE FOR CLOGGING
1.Disconnect rubber tube connected to EVAP canister vent control valve.
2.Check the rubber tube for clogging.
OK or NG
OK- GO TO 9.
NG- Clean the rubber tube using an air blower.
9. CHECK DRAIN FILTER
P0442.
OK or NG
OK- GO TO 10.
NG- Replace drain filter.
10. CHECK EVAP CANISTER VENT CONTROL VALVE
P0447.
OK or NG
OK- GO TO 11.
NG- Replace EVAP canister vent control valve. Service and Repair.
11. CHECK IF EVAP CANISTER IS SATURATED WITH WATER
1.Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.
2.Check if water will drain from the EVAP canister.
Yes or No
Yes- GO TO 12.
No- GO TO 14.
12. CHECK EVAP CANISTER
Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor attached.
The weight should be less than 2.0 kg (4.4 lb).
OK or NG
OK- GO TO 14.
NG- GO TO 13.
13. DETECT MALFUNCTIONING PART
Check the following.
- EVAP canister for damage
- EVAP hose between EVAP canister and drain filter for clogging or poor connection
- Repair hose or replace EVAP canister. Service and Repair.
14. CHECK INTERMITTENT INCIDENT
Intermittent Incident.
-INSPECTION END
Component Inspection
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT
Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.
Without CONSULT
Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.
DRAIN FILTER
1.Check visually for insect nests in the drain filter air inlet.
2.Check visually for cracks or flaws in the appearance.
3.Check visually for cracks or flaws in the hose.
4.Blow air into port A and check that it flows freely out of port B.
5.Block port B.
6.Blow air into port A and check that there is no leakage.
7.If NG, replace drain filter.