DTC P2420 Evaporative Emission System Switching Valve Control Circuit High: Wiring Diagram

WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Evaporative Emission System Switching Valve Control Circuit High - Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSIS PROCEDURE

Step	Check	Yes	No
1 CHECK HARNESS BETWEEN ECM AND PURGE CONTROL SOLENOID VALVE 2 CONNECTOR. Turn the ignition switch to OFF. Disconnect the connectors from ECM and purge control solenoid valve 2. Turn the ignition switch to ON. Measure the voltage between ECM and chassis ground. Connector & terminal (B137) No. 15 (+) - Chassis ground (-):	Is the voltage 10 V or more?	Repair the short to power in the harness between ECM and purge control solenoid valve 2 connector.	Go to step 2 .
2 CHECK PURGE CONTROL SOLENOID VALVE 2. Turn the ignition switch to OFF. Measure the resistance between purge control solenoid valve 2 terminals. Terminals No. 1 - No. 2:	Is the resistance less than 1 Ω?	Replace the purge control solenoid valve 2. < Refer to PURGE CONTROL SOLENOID VALVE . >	Repair the poor contact of ECM connector.