1. Disconnect the back-up light switch connector.
2. Inspect for continuity between the back-up light switch terminals using an ohmmeter.


Back-up light switch removal/installation
Flasher unit removal/installationMazda 6 Service Manual: Cruise actuator inspection
1. Disconnect the cruise actuator connector.
2. Measure the voltage, continuity and resistance at the cruise actuator
terminals as indicated below.
If not as specified, inspect the parts listed under Action.
If the parts and wiring harnesses are okay but the system still does not
work pr ...
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 ...