Note
1. Open the bonnet.
2. Disconnect the negative battery cable.
3. Remove the radiator grille.
4. Disconnect the bonnet switch connector.
5. Check the continuity between the bonnet switch terminals A and B using an ohmmeter.

6. Lock the bonnet lock using a flat-head screwdriver or equivalent as shown.

7. Check the no continuity between the bonnet switch terminals A and B using an ohmmeter.
Caution
Theft-deterrent control module removal/installationMazda 6 Service Manual: Foreword
Outline
The OBD (on-board diagnostic) test inspects the integrity and function
of the air bag system and outputs the results when requested by the specific
tests.
OBD test also:
- Provides a quick inspection of the air bag system.
- Is usually performed at the start of each diagn ...
Mazda 6 Service Manual: To Operate the System
The High Beam Control System (HBC) operates to switch the headlights automatically
between high and low beams after the ignition is switched ON and the headlight switch
is in the AUTO and high beam position.
The High Beam Control System (HBC) determines that it is dark based on the brightness
...