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: Locking, Unlocking with Auxiliary Key
Turn the auxiliary key toward the front to lock, toward the back to unlock.
To lock
All doors lock automatically when the driver's door is locked using the auxiliary
key.
To unlock
The driver’s door unlocks when the auxiliary key is turned briefly to the unlock
position and then immediatel ...
Mazda 6 Service Manual: Crankshaft position (ckp) sensor removal/installation
Removal
1. Perform the following procedure to making the working space.
(1) Remove the Front wheel (RH).
(2) Remove the splash shield.
2. Disconnect the CKP sensor connector.
3. Remove the installation bolts to remove the CKP sensor.
Installation
Caution
When foreign material such a ...