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Home >> Mazda >> 2013 >> 5 Grand Touring >> Repair and Diagnosis >> External Pages >> Different car >> Section 439 (Emission System) >> Secondary Air Injection (Air) Pump Inspection >> Discharging Pressure Inspection >> Without using WDS or equivalent

Without using WDS or equivalent

WARNING: This page is about a different car, the 2005 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the air hose between the AIR pump and AIR control valve at the AIR control valve side.
  2. Install the SST  on the AIR control side using tape to prevent air leakage.
  3. Start the engine, turn all electrical loads off, and idle the engine after completely warming it up.
  4. Connect the AIR pump relay terminal A to the ground, and operate the AIR pump.
    CAUTION:
    • When connecting the secondary air injection pump relay to the body ground, short the specified terminal, because shorting the wrong terminal may cause malfunctions.
    • Do not operate the secondary air injection pump for more than 1 min to avoid damaging the pump.
    • Stop the engine and wait for 1 hour or more after energizing of the secondary air injection pump to allow it to cool down before operating it again.
    Fig 1: Measuring Secondary Air Injection Pressure
    G03701979Courtesy of MAZDA MOTORS CORP.
  5. Verify that the discharging pressure of the AIR pump is within the specification.
    • If not within the specification of the discharge pressure, inspect the following:
      • PCM terminal 4O voltage
      • AIR pump relay
    • If it is within the specification, inspect continuity for the AIR pump.

    Discharging pressure 

    1. 13.7 kPa {0.14 kgf/cm 2  , 1.99 psi} or more 
    Fig 2: Identifying Air Pump Relay
    G03701980Courtesy of MAZDA MOTORS CORP.
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