1. Connect the WDS or equivalent to the DLC-2.
2. Measure the PID value.
Note
PID/DATA MONITOR AND RECORD function table

Dtc p0841
TroubleshootingMazda 6 Service Manual: Displayable Range on the Screen
The images on the screen may be different from the actual conditions.
NOTE
The displayable range varies depending on the vehicle and road conditions.
The displayable range is limited. Objects under the bumper or around
the bumper ends cannot be displayed.
The distance appearing in the ...
Mazda 6 Service Manual: Antilock Brake System (ABS)
The ABS control unit continuously monitors the speed of each wheel. If one wheel
is about to lock up, the ABS responds by automatically releasing and reapplying
that wheel's brake.
The driver will feel a slight vibration in the brake pedal and may hear a chattering
noise from the brake system ...