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.

Remove the air hose between the AIR pump and AIR control valve at the AIR control valve side.
Install the SST on the AIR control side using tape to prevent air leakage.
Start the engine, turn all electrical loads off, and idle the engine after completely warming it up.

Fig 1: Measuring Air Control Valve Pressure
Courtesy of MAZDA MOTORS CORP.
Connect the WDS or equivalent to the DLC-2.
Turn the PID AIP RLY from off to on position using the simulation function.
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 2: Locating DLC-2
Courtesy of MAZDA MOTORS CORP.
Verify that the discharging pressure of the AIR pump is within the specification.
- If not within the specification, inspect the following:
  - PCM terminal 4O voltage
  - AIR pump relay
- If it is within the specification, inspect the continuity for the AIR pump.
Discharging pressure
1. 13.7 kPa {0.14 kgf/cm ² , 1.99 psi} or more