1.CHECK SECONDARY AIR PUMP FUSE.
Check if the secondary air pump fuse (60 A) is blown out.
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2.CHECK HARNESS BETWEEN SECONDARY AIR PUMP RELAY CONNECTOR AND SECONDARY AIR PUMP CONNECTOR.
1) Remove the secondary air pump fuse (60 A).
2) Remove the secondary air pump relay.
3) Disconnect the secondary air pump connector.
4) Measure the resistance between secondary air pump relay connector and engine ground.
Connector & terminal
(F9) No. 11 — Engine ground:
(F9) No. 14 — Engine ground:
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Is the resistance 1 MΩ or more?
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Replace the fuse with a new part, connect the secondary air pump relay and secondary air pump connector, and then go to the next step. 
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NOTE:
In this case, repair the following item:
• Ground short of bus bar between secondary air pump fuse (60 A) and secondary air pump relay
• Short circuit to ground in harness between secondary air pump relay connector and secondary air pump connector
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3.CHECK SECONDARY AIR PUMP OPERATION.
1) Connect the delivery (test) mode connector.
2) Turn the ignition switch to ON.
3) Perform the Clear Memory Mode.
4) Perform operation check for the secondary air pump using the Subaru Select Monitor.
NOTE:
• Subaru Select Monitor
Refer to “Compulsory Valve Operation Check Mode” for more operation procedures.
• The compulsory operation using the Subaru Select Monitor is performed only for 5 seconds in order to protect the secondary air pump. When operating again, perform the Clear Memory Mode.
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Does the secondary air pump operate?
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4.CHECK DUCT BETWEEN SECONDARY AIR PUMP AND COMBINATION VALVE.
Check the duct between secondary air pump and combination valve.
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Is there damage, clog or disconnection of the duct?
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Replace, clean or connect the duct.
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Replace the secondary air combination valve LH.
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5.CHECK POWER SUPPLY TO SECONDARY AIR PUMP.
1) Perform the Clear Memory Mode.
2) Turn the ignition switch to OFF.
3) Disconnect the secondary air pump connector.
4) In the condition of step 3, measure the voltage between the secondary air pump connector and the engine ground.
NOTE:
For detailed procedures, refer to “Clear Memory Mode”.
Connector & terminal
(F11) No. 2 (+) — Engine ground (−):
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Is the voltage 10 V or more?
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6.CHECK HARNESS BETWEEN SECONDARY AIR PUMP CONNECTOR AND ENGINE GROUND.
Measure the resistance of the harness between secondary air pump connector and engine ground.
Connector & terminal
(F11) No. 1 — Engine ground:
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Is the resistance less than 5 Ω?
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Replace the secondary air pump.
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Repair the open circuit of the harness between secondary air pump connector and engine ground.
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7.CHECK HARNESS BETWEEN SECONDARY AIR PUMP RELAY CONNECTOR AND SECONDARY AIR PUMP CONNECTOR.
1) Turn the ignition switch to OFF.
2) Remove the secondary air pump relay.
3) Measure the resistance of harness between secondary air pump relay connector and secondary air pump connector.
Connector & terminal
(F9) No. 11 — (F11) No. 2:
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Is the resistance less than 1 Ω?
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Repair the open circuit in harness between secondary air pump relay connector and secondary air pump connector.
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8.CHECK SECONDARY AIR PUMP RELAY.
1) Connect the battery to terminals No. 12 and No. 13 of the secondary air pump relay.
2) Measure the resistance between secondary air pump relay terminals.
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Is the resistance less than 1 Ω?
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Replace the secondary air pump relay.
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9.CHECK SECONDARY AIR PUMP RELAY POWER SUPPLY.
1) Turn the ignition switch to ON.
2) Measure the voltage between the secondary air pump relay connector and chassis ground.
Connector & terminal
(F9) No. 12 (+) — Engine ground (−):
(F9) No. 14 (+) — Engine ground (−):
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Is the voltage 10 V or more?
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Repair the open or ground short circuit of harness of power supply circuit.
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10.CHECK HARNESS BETWEEN ECM AND SECONDARY AIR PUMP RELAY CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the ECM connector.
3) Measure the resistance of harness between ECM and secondary air pump relay connector.
Connector & terminal
(B135) No. 32 — (F9) No. 13:
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Is the resistance less than 1 Ω?
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Repair the poor contact of ECM connector.
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Repair the open circuit of harness between ECM and secondary air pump relay connector.
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