DTC P0414 Secondary Air Injection System Switching Valve "A" Circuit Shorted: Wiring Diagram

WARNING: This page is about a different car, the 2013 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

Engine electrical system, turbo model < Refer to appropriate SYSTEM WIRING DIAGRAM.>

Fig 1: Secondary Air Injection System - Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

Step	Check	Yes	No
1 CHECK HARNESS BETWEEN ECM AND SECONDARY AIR COMBINATION VALVE RELAY 1 CONNECTOR. Turn the ignition switch to OFF. Disconnect the connector from ECM. Remove the secondary air combination valve relay 1. Measure the voltage between ECM and chassis ground. Connector & terminal (B135) No. 8 (+) - Chassis ground (-):	Is the voltage 10 V or more?	Repair the short circuit to power in harness between ECM and secondary air combination valve relay 1 connector.	Repair the poor contact of ECM connector.