Code 0214
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 valve changes to control the flow rate. A built-in step motor moves the valve in steps corresponding to the ECM output pulses. 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 valve uses a step motor to control the flow rate of fuel vapor from the EVAP canister. This motor has four winding phases. It operates according to the output pulse signal of the ECM. Two windings are turned ON and OFF in sequence. Each time an ON pulse is issued, the valve opens or closes, changing the flow rate. When no change in the flow rate is needed, the ECM does not issue the pulse signal. A certain voltage signal is issued so that the valve remains at that particular opening.
CONSULT Reference Value in Data Monitor Mode
ECM Terminals and Reference Value
Specification data are reference values and are measured between each terminal and 43 (ECM ground).
ON BOARD DIAGNOSIS LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION: Always drive vehicle at a safe speed.
NOTE: If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch "OFF" and wait at least 5 seconds before conducting the next test.
TESTING CONDITION: Always perform at a temperature above 5 °C (41 °F).
With CONSULT
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch "OFF" and wait at least 5 seconds.
3. Turn ignition switch "ON".
4. Select "PURG CN/V & S/V P1493" of "EVAPORATIVE SYSTEM" in "DTC WORK SUPPORT" mode with CONSULT.
5. Touch "START".
6. Start engine and let it idle for at least 90 seconds.
7. When the following conditions are met, "TESTING" will be displayed on the CONSULT screen. Maintain the conditions continuously until "TESTING" changes to "COMPLETED". (It will take at least 30 seconds.)
8. Stop vehicle with engine running.
9. Select "PURG VOL CN/V P1444" of "EVAPORATIVE SYSTEM" in "DTC WORK SUPPORT" mode with CONSULT.
10. Touch "START".
If "COMPLETED" is displayed, go to step 12.
11. When the following conditions are met, "TESTING" will be displayed on the CONSULT screen. Maintain the conditions continuously until "TESTING" changes to "COMPLETED". (It will take at least 20 seconds.)
NOTE: If "TESTING" is not displayed after 5 minutes, retry from step 2.
12. Make sure that "OK" is displayed after touching "SELF-DIAG RESULTS". If "NG" is displayed, refer to "Diagnostic Procedure".
With GST
NOTE: It is better that the fuel level is low.
1. Start engine and warm it up to normal operating temperature.
2. Select "MODE 1" with GST.
3. Check engine coolant temperature.
Engine coolant temperature: 40 - 100 °C (104 - 212 °F)
Be sure that engine coolant temperature does not exceed 100 °C (212 °F). If it becomes higher than 100 °C (212 °F), cool down the engine and perform the procedure again from the beginning.
4. Turn ignition switch "OFF" and wait at least 5 seconds.
5. Restart engine and let it idle for at least 100 seconds.
6. Maintain the following conditions for at least 80 seconds.
NOTE:
- Hold the accelerator pedal as steady as possible during driving in step 6.
- If the driving conditions are not satisfied in step 6, restart the procedure.
7. Select "MODE 7" with GST.
8. If 1st trip DTC is detected, go to "Diagnostic Procedure".
Without CONSULT
NOTE: It is better that the fuel level is low.
1. Start engine and warm it up to normal operating temperature.
2. Check voltage between ECM terminal 51 (Engine coolant temperature sensor signal) and ground
Voltage: 0.8 - 1.5 V
Perform the following procedure before the voltage drops below 0.8 V. If the voltage drops below 0.8 V, cool down the engine and perform the procedure again from the beginning.
3. Turn ignition switch "OFF" and wait at least 5 seconds.
4. Restart engine and let it idle for at least 100 seconds.
5. Maintain the following conditions for at least 80 seconds.
NOTE:
- Hold the accelerator pedal as steady as possible during driving in step 5.
- If the driving conditions are not satisfied in step 5, restart the procedure.
6. Turn ignition switch "OFF", wait at least 5 seconds, and then turn "ON".
7. Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.
8. If 1st trip DTC is detected, go to "Diagnostic Procedure".
1 CHECK EVAP CANISTER PURGE VOLUME CONTROL VALVE:
2 CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR HOSE:
3 CHECK HARNESS CONNECTOR:
4 CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR AND CIRCUIT:
5 CHECK EVAP CANISTER VENT CONTROL VALVE:
6 CHECK RUBBER TUBE FOR CLOGGING:
7 CHECK IF EVAP CANISTER IS SATURATED WITH WATER:
8 CHECK EVAP CANISTER:
9 DETECT MALFUNCTIONING PART:
10 CHECK INTERMITTENT INCIDENT:
DIAGNOSTIC PROCEDURE
COMPONENT INSPECTION
With CONSULT
1. Disconnect EVAP canister purge volume control valve harness connector.
2. Check resistance between the following terminals.
terminal 2 and terminals 1, 3
terminal 5 and terminals 4, 6
Resistance: 35 - 43 Ohms [At 20 °C (68 °F)]
3. Reconnect EVAP canister purge volume control valve harness connector.
4. Remove EVAP canister purge volume control valve from intake manifold collector and disconnect hoses from the valve. (Plug the purge hoses. The EVAP canister purge volume control valve harness connector should remain connected.)
5. Turn ignition switch "ON".
6. Perform PURG VOL CONT/V" in "ACTIVE TEST" mode with CONSULT. Check that EVAP canister purge volume control valve shaft moves smoothly forward and backward according to the valve opening.
If NG, replace the EVAP canister purge volume control valve.
Without CONSULT
1. Disconnect EVAP canister purge volume control valve harness connector.
2. Check resistance between the following terminals.
terminal 2 and terminals 1, 3
terminal 5 and terminals 4, 6
Resistance: 35 - 43 Ohms[At 20 °C (68 °F)]
3. Reconnect EVAP canister purge volume control valve harness connector.
4. Remove EVAP canister purge volume control valve from intake manifold collector and disconnect hoses from the valve. (Plug the purge hoses. The EVAP canister purge volume control valve harness connector should remain connected.)
5. Turn ignition switch "ON" and "OFF". Check that EVAP canister purge volume control valve shaft moves smoothly forward and backward according to the ignition switch position.
If NG, replace the EVAP canister purge volume control valve.