1.CHECK SECONDARY AIR PIPING PRESSURE.
1) Turn the ignition switch to ON.
2) Using the Subaru Select Monitor, read secondary air piping pressure data, and compare with the actual barometric pressure.
NOTE:
For detailed operation procedures, refer to “READ CURRENT DATA FOR ENGINE”. 
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Is the actual difference with atmospheric pressure 50 mmHg (6.7 kPa, 2.0 inHg, 0.97 psig) or more?
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Even if DTC is detected, the circuit has returned to a normal condition at this time. Reproduce the fault condition, and reperform the check.
NOTE:
In this case, there may be a temporary connector contact failure.
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2.CHECK SECONDARY AIR PUMP.
1) Start the engine and warm up engine until coolant temperature is higher than 75°C (167°F).
2) Check whether or not the secondary air pump is operating.
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Is the secondary air pump operating?
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Replace the secondary air combination valve RH.
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3.CHECK HARNESS BETWEEN ECM AND SECONDARY AIR PUMP RELAY CONNECTOR.
1) Turn the ignition switch to OFF.
2) Remove the secondary air pump relay from the relay box.
3) Measure the resistance between secondary air pump relay connector and engine ground.
Connector & terminal
(F9) No. 13 — Engine ground:
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Is the resistance 1 MΩ or more?
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Repair the ground short circuit of harness between ECM and secondary air pump relay connector.
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4.CHECK SECONDARY AIR PUMP RELAY.
Measure the resistance between secondary air pump relay terminals.
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Is the resistance 1 MΩ or more?
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Repair the short circuit to power in the harness between secondary air pump relay and secondary air pump connector.
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Replace the secondary air pump relay.
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