
Diagnostic Procedure

Dtc 18
Dtc 21Mazda 6 Service Manual: Basic Operation Method
TOUCH & TAP
1. Touch or tap on the item indicated on the screen.
2. The operation is launched and the next item is displayed.
SLIDE
1. Touch the setting item displaying a slider bar.
2. Touch the slider with your finger and move to the desired level.
SWIPE
1. Touch the screen with you ...
Mazda 6 Service Manual: Nonreturn valve inspection
1. Remove the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION.)
2. Siphon the fuel from the fuel tank.
Note
Nonreturn valve is integrated in the fuel tank.
The nonreturn valve is normally closed by the spring force.
3. Verify that the nonreturn valve is closed.
If the nonretu ...