Without using WDS or equivalent

WARNING: This page is about a different car, the 2004 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

Warm up the engine and idle it.
Disconnect the vacuum hose which is connected to the charcoal canister from purge solenoid valve.
Place your finger onto the evaporative hose as shown in the figure and verify that vacuum is applied.

Fig 1: Checking Vacuum In Evaporative Hose
Courtesy of MAZDA MOTORS CORP.
- If vacuum is not applied, inspect the following:
  - PCM output signal circuit (wiring harness, connector)
    - Evaporative purge control signal
  - Purge solenoid valve
Run the vehicle on the chassis dynamometer and maintain the engine speed at approx. 2,000 rpm.
Verify that vacuum is applied after approx. 30 s.
- If the vacuum is not verified, inspect the following:
  - PCM input signal circuit (sensor, switch, wiring harness)
    - Intake air temperature signal (IAT sensor)
    - Evaporative purge control signal (purge solenoid valve)
    - Throttle opening signal (TP sensor)
    - Load/no load identification signal Neutral switch/CPP switch (MTX)/TR switch (ATX)
  - Purge solenoid valve