1.CHECK CURRENT DATA.
1) Turn the ignition switch to ON.
2) Read the data of secondary air piping pressure signal using Subaru Select Monitor or general scan tool.
NOTE:
• Subaru Select Monitor
For detailed operation procedures, refer to “READ CURRENT DATA FOR ENGINE”. 
• General scan tool
For detailed operation procedures, refer to the general scan tool operation manual.
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Is the measured value 133.3 kPa (1000 mmHg, 39.4 inHg) or more?
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Even if DTC is detected, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.
NOTE:
In this case, temporary poor contact of connector may be the cause.
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2.CHECK HARNESS BETWEEN ECM AND SECONDARY AIR COMBINATION VALVE RH CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from the secondary air combination valve RH.
3) Turn the ignition switch to ON.
4) Read the data of secondary air piping pressure signal using Subaru Select Monitor or general scan tool.
NOTE:
• Subaru Select Monitor
For detailed operation procedures, refer to “READ CURRENT DATA FOR ENGINE”.
• General scan tool
For detailed operation procedures, refer to the general scan tool operation manual.
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Is the measured value 133.3 kPa (1000 mmHg, 39.4 inHg) or more?
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Repair the short circuit to power in the harness between ECM and secondary air combination valve RH connectors.
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3.CHECK HARNESS BETWEEN ECM AND SECONDARY AIR COMBINATION VALVE RH CONNECTOR.
1) Turn the ignition switch to OFF.
2) Measure the resistance of the harness between the secondary air combination valve RH connector and engine ground.
Connector & terminal
(E41) No. 3 — Engine ground:
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Is the resistance less than 5 Ω?
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Repair the harness and connector.
NOTE:
In this case, repair the following item:
• Open circuit in harness between ECM and secondary air combination valve RH connector
• Poor contact of ECM connector
• Poor contact of coupling connector
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4.CHECK POOR CONTACT.
Check for poor contact of secondary air combination valve RH connector.
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Is there poor contact of secondary air combination valve RH connector?
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Repair the poor contact of secondary air combination valve RH connector.
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Replace the secondary air combination valve RH.
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