
Diagnostic procedure

No.1 any of the following lights do not illuminate with ignition switch on:
(abs warning light, brake system warning light, dsc indicator light and/or
tcs-off light)
No.3 there is a malfunction in the system even though abs warning light,
brake system warning light, dsc indicator light and tcs-off light do not
illuminateMazda 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
...
Mazda 6 Service Manual: Lane Departure Warning
If the system determines that the vehicle may deviate from its lane, the lane
departure warning (beep sound, rumble sound*1, or steering wheel vibration) is activated
and the direction in which the system determines that the vehicle may deviate is
indicated in the multi-information display and ...