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DTC P0410 Secondary Air Injection System: 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
G08540676Courtesy of SUBARU OF AMERICA, INC.
Step Check Yes No
1 CHECK SECONDARY AIR PUMP FUSE. 
Check if the secondary air pump fuse (60 A) is blown out.		 Is the fuse blown out? Go to step 2.  Go to step 3. 
2 CHECK HARNESS BETWEEN RELAY HOLDER AND SECONDARY AIR PUMP CONNECTOR. 
  1. Remove the secondary air pump fuse from the relay holder.
  2. Disconnect the secondary air pump connector.
  3. Measure the resistance between the secondary air pump fuse and secondary air pump connector, and chassis ground.

    Connector & terminal 

    (F9) No. 16 - Chassis ground: 

    (F11) No. 2 - Chassis ground: 

 Is the resistance 1 MΩ or more? Replace the fuse with a new part, and connect the secondary air pump connector. Go to step 3.  Repair the short circuit to ground in harness between relay holder and secondary air pump connector.
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

    For detailed operation procedure, refer to "Clear Memory Mode" < Refer to CLEAR MEMORY MODE . > and "Compulsory Valve Operation Check Mode" < Refer to COMPULSORY VALVE OPERATION CHECK MODE . >.

  • 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.
 Does the secondary air pump operate? Go to step 4.  Go to step 5. 
4 CHECK DUCT BETWEEN SECONDARY AIR PUMP AND COMBINATION VALVE. 
Check the duct between secondary air pump and combination valve.		 Is there damage, clog or disconnection of the duct? Replace, clean or connect the duct. Replace the secondary air combination valve RH. < Refer to SECONDARY AIR COMBINATION VALVE . >
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 chassis ground.
NOTE: For detailed procedures, refer to "Clear Memory Mode". < Refer to CLEAR MEMORY MODE . >

Connector & terminal 
(F11) No. 2 (+) - Chassis ground (-): 		 Is the voltage 10 V or more? Replace the secondary air pump. < Refer to SECONDARY AIR PUMP . > Go to step 6. 
6 CHECK HARNESS BETWEEN SECONDARY AIR PUMP RELAY 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: 

 Is the resistance less than 1 Ω? Go to step 7.  Repair the open circuit in harness between secondary air pump relay connector and secondary air pump connector.
7 CHECK HARNESS BETWEEN SECONDARY AIR PUMP CONNECTOR AND CHASSIS GROUND. 
Measure the resistance of the harness between secondary air pump connector and chassis ground.
Connector & terminal 
(F11) No. 1 - Chassis ground: 		 Is the resistance less than 5 Ω? Go to step 8.  Repair the open circuit of the harness between secondary air pump connector and chassis ground.
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.

    Terminals 

    No. 14 - No. 11: 

 Is the resistance less than 1 Ω? Go to step 9.  Replace the secondary air pump relay. < Refer to ELECTRICAL COMPONENT LOCATION . >
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. 14 (+) - Chassis ground (-): 

    (F9) No. 12 (+) - Chassis ground (-): 

 Is the voltage 10 V or more? Go to step 10.  Repair the open or ground short circuit of power supply circuit.
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. 27 - (F9) No. 13: 

 Is the resistance less than 1 Ω? Repair the poor contact of ECM connector. Repair the harness and connector.
NOTE: In this case, repair the following item:
  • Repair the open circuit in harness between ECM connector and secondary air pump relay connector.
  • Poor contact of coupling connector
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