Mazda 6 Service Manual: Rear door lock actuator inspection
Door Lock Actuator
1. Disconnect the front door lock actuator connector.
2. Apply battery positive voltage to the front door lock actuator terminals
and inspect the operation of the front door lock actuator.
If not as specified, replace the front door lock actuator.
With double locking ...
Mazda 6 Service Manual: Multi-Information Display and INFO Switch (Some models)
The multi-information display indicates the following information.
Odometer
Trip meter
Engine coolant temperature gauge
Fuel gauge
Outside temperature
Distance-to-empty
Average fuel economy
Current fuel economy
Maintenance Monitor
...