1. Measure the temperature around the water temperature sensor.
2. Measure the resistance between terminals of the water temperature sensor.

Water temperature sensor removal/installation
Refrigerant pressure switch removal/installationMazda 6 Service Manual: Operating the Compact Disc (CD) Player
NOTE
If a disc has both music data (CD-DA) and MP3/WMA/AAC files, playback of the
two or three file types differs depending on how the disc was recorded.
Inserting the CD
Insert the CD into the slot, label-side up. The auto-loading mechanism will set
the CD and begin play.
NOTE
There wi ...
Mazda 6 Service Manual: No.4 air intake mode does not change
When performing an asterisked (*) troubleshooting inspection, shake the
wiring harness and connectors while performing the inspection to discover
whether poor contact points are the cause of any intermittent malfunctions.
If there is a problem, check to make sure connectors, terminal ...