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Home >> Subaru >> 2016 >> WRX Premium, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine Controls (Diagnostics) (H4DOTC) (WRX-STI)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0417 Secondary Air System Switching Valve "B" Circuit Shorted >> Wiring Diagram

DTC P0417 Secondary Air System Switching Valve "B" Circuit Shorted: Wiring Diagram

WARNING: This page is about a different variant/trim than selected.
DIAGNOSTIC PROCEDURE

Step Check Yes No
1 CHECK HARNESS BETWEEN ECM AND SECONDARY AIR COMBINATION VALVE RELAY 2 CONNECTOR. 
  1. Turn the ignition switch to OFF.
  2. Disconnect the connector from ECM.
  3. Remove the secondary air combination valve relay 2.
  4. Measure the voltage between ECM connector and chassis ground.

    Connector & terminal 

    (B135) No. 20 (+) - Chassis ground (-): 

Is the voltage 10 V or more? Repair the short circuit to power in harness between ECM connector and secondary air combination valve relay 2 connector. Repair the poor contact of ECM connector.