1. Remove the evaporative gas check valve (one-way).
2. Apply pressure to port A, and verify that there is no airflow.
3. Apply negative pressure to port A, and verify that there is air flow.

Charcoal canister inspection
Purge solenoid valve removal/installationMazda 6 Service Manual: Battery Recharging
NOTE
Before performing maintenance or recharging the battery, turn off all
accessories and stop the engine.
To disconnect the battery, remove the negative cable first. Install it
last when connecting the battery.
Be sure to remove the caps before recharging the battery.
I ...
Mazda 6 Service Manual: Washer fluid-level sensor inspection
1. Disconnect the negative battery cable.
2. Remove the washer tank. (See WASHER TANK REMOVAL/INSTALLATION)
3. Insoect for continuity between the washer fluid-level sensor terminals
using an ohmmeter.
4. Verify that the windshield washer motor operates.
If not as specified, replace the ...