Mazda CX-9 Grand Touring 2009 Manual page 501

After repair, it is necessary to clear the DTC from the control module memory.
Also, if the DSC/RSC related parts have been replaced, verify that no DTC is displayed after
repairs.
After repairing the ABS wheel-speed sensor or ABS sensor rotor, or after replacing the
control module, the ABS warning light may not go out even when the ignition switch is
turned to the ON position. In this case, drive the vehicle at a speed of more than 10 km/h
{6.2 mph} , make sure the ABS warning light goes out, and then clear the DTC.
When repairing, if the DSC/RSC related connectors are disconnected and the ignition switch
is turned to the ON position, the control module will mistakenly detect a fault and record it as
a malfunction.
WARNING:
To protect the control module, make sure the ignition is off before connecting or
disconnecting the control module connector.
2. Malfunctions in hydraulic system
Symptoms in a hydraulic system malfunction are similar to those in a conventional brake
malfunction. However, it is necessary to determine if the malfunction is in a DSC/RSC
component or the conventional brake system.
The hydraulic unit contains delicate mechanical parts. If foreign material gets into the
component, the DSC/RSC may fail to operate. Also, it will likely become extremely difficult
to find the location of the malfunction in the event that the brakes operate but the DSC/RSC
does not. Make sure foreign material does not enter when servicing the DSC/RSC (e.g. brake
fluid replacement, pipe removal).
INTERMITTENT CONCERN TROUBLESHOOTING
Vibration method
If a malfunction occurs or becomes worse while driving on a rough road or when the engine is vibrating,
perform the following steps.
NOTE:
2008 Mazda CX-9 Grand Touring
2008 BRAKES Symptom Troubleshooting (DSC/RSC) - Mazda CX-9
If the DSC/RSC sensor initialization procedure is not
completed, it could result in an unexpected accident due
to the DSC/RSC being inoperative. Therefore, after the
DSC/RSC HU/CM or combined sensor is replaced, always
perform the DSC/RSC sensor initialization precedure to
ensure proper DSC/RSC operation. (See DSC/RSC
SENSOR INITIALIZATION PROCEDURE .)
There are several reasons why vehicle or engine vibration could
cause an electrical malfunction. Inspect the following:
Connectors not fully seated.
Wire harnesses not having full play.