2. Precautions during servicing of DSC/RSC
The DSC/RSC is composed of electrical and mechanical parts. It is necessary to categorize malfunctions
as being either electrical or hydraulic when performing troubleshooting.
1. Malfunction in electrical system
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The control module has an on-board diagnostic function. With this function, the ABS
warning light and/or BRAKE system warning light and/or DSC indicator light and/or TCS
OFF light will illuminate when there is a problem in the electrical system.
Also, past and present malfunctions are in the control module. This function can find
malfunctions that do not occur during periodic inspections. Connect the M-MDS to the DLC-
2, the stored malfunctions will be displayed in the order of occurrence. To find out the causes
of DSC/RSC malfunctions, use these on-board diagnostic results.
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If a malfunction occurred in the past but is now normal, the cause is likely a temporary poor
connection of the wiring harness.
The control module usually operates normally. Be careful when searching for the cause of
malfunction.
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ABS
warning
light
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BRAKE
system
warning
light
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DSC
indicator
light
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TCS OFF
light
wheel speed sensors are
spun for
20 s or more.
After turning
ignition switch off,
vehicle is driven at
speed
greater than
10 km/h {6.2 mph}
and normal
operation is
confirmed.
DSC/RSC HU/CM
detects that wheel speed
sensors determine that
two or more wheels are
malfunctioning.
2. Enables control, if wheel
speed sensors determine
three or more wheels are
functioning correctly.
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TCS: Disables control.
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DSC: Disables control.
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RSC: Disables control.
Parking brake is not fully
released while driving.
Brake drag.
Sudden
acceleration/deceleration.
Left/right or front/rear tires are
different. (Size, radius, tire
pressure, or wear is other than
that listed on tire label.)
Battery voltage at DSC/RSC
HU/CM ignition terminal drops
below approx. 10 V.
Battery voltage rises
above approx. 10
V.
ABS: Disables control.
EBD: Enables control.
TCS: Disables control.
DSC: Disables control.
RSC: Disables control.
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Brake
system
warning
light
Brake fluid amount is low.
Brake fluid level
lower than
recommended
amount.
ABS: Enables control.
EBD: Enables control.
TCS: Enables control.
DSC: Disables control.
RSC: Disables control.
2008 Mazda CX-9 Grand Touring
2008 BRAKES Symptom Troubleshooting (DSC/RSC) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 9:41:34 AM
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© 2005 Mitchell Repair Information Company, LLC.
