
Diagnostic procedure

Dtc b1877, b1878, b1879, b1885
Dtc b1884, b1890Mazda 6 Service Manual: Operating Tips
Operate the climate control system with the engine running.
To prevent the battery from being discharged, do not leave the fan control
dial/switch on for a long period of time with the ignition switched ON when
the engine is not running.
Clear all obstructions such as leaves, snow and i ...
Mazda 6 Service Manual: Noise filter inspection
Brake Light Noise Filter
1. Inspect for resistance and continuity between the noise filter terminals
using an ohmmeter.
If not as specified, replace the noise filter.
Rear Window Defroster Noise Filter
Inspect for resistance and continuity between the noise filter terminals
using an ...