P1490

COMPONENT DESCRIPTION
The vacuum cut valve and vacuum cut valve bypass valve are installed in parallel on the EVAP purge line between the fuel tank and the EVAP canister.

The vacuum cut valve prevents the intake manifold vacuum from being applied to the fuel tank.

The vacuum cut valve bypass valve is a solenoid type valve and generally remains closed. It opens only for on board diagnosis. The vacuum cut valve bypass valve responds to signals from the ECM. When the ECM sends an ON (ground) signal, the valve is opened. The vacuum cut valve is then bypassed to apply intake manifold vacuum to the fuel tank.

Evaporative Emission System Diagram:

Consult-II Reference Value In Data Monitor Mode:

ECM Terminals And References Value:

On Board Diagnosis Logic:

DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE

NOTE:
If "DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCEDURE" has been previously conducted, always turn the ignition switch "OFF" and wait at least 5 seconds before conducting the next test.

With Consult
1. Turn ignition switch "ON".
2. Select "DATA MONITOR" mode with CONSULT-II.
3. Start engine and wait at least 5 seconds.
4. If 1st trip DTC is detected, go to "DIAGNOSTIC PROCEDURE".

OR

With Generic Scan Tool
Follow the procedure "With CONSULT-II" above.

EC-BYPS/V-01:

EC-BYPS/V-01 Connector View:

WIRING DIAGRAM

Super Multiple Junction (SMJ) Terminal Arrangement (B4, B101, E70, E81, F63, M3, M49, M50):

Super Multiple Junction (SMJ) Terminal Arrangement (B102, F64):

Fuse Block - Junction Block (J/B) Terminal Arrangement (B1, B2, E61, E62, E63, E64, M1):

DIAGNOSTIC PROCEDURE

COMPONENT INSPECTION

Vacuum cut valve bypass valve
Check air passage continuity.







With Consult
Perform "VC/V BYPASS/V" in "ACTIVE TEST" mode.

OR







Without Consult
If NG or operation takes more than 1 second, replace vacuum cut valve bypass valve.