Mazda 6 Training Manual page 173

Fail-safe Function
• If a failure is detected in the self-diagnostic function, the fail-safe illuminates the ABS warning light, BRAKE
system warning light, DSC indicator light, and/or TCS (DSC) OFF light to notify the driver. At the same time, the
ABS (ABS/TCS) or DSC HU/CM controls the ABS, EBD, TCS, DSC and brake assist. The fail-safe function
ensures normal braking even when ABS, EBD, TCS, DSC and/or brake assist control stops, as shown in the
figure.
Caution
• • • • In the event that EBD control stops, the rear wheels may lock before the front wheels, causing the
vehicle to skid. Inspect the system immediately if EBD control stops.
Fail-safe function table
DTC
WDS
Malfunction
or
location
equival
ent
Brake fluid C1953
pressure
illuminated
C1954
sensor
C1280
C1730
Combine
C1951
sensor illuminated
C1952
C1959
C1145
C1155
Wheel-speed
sensor
C1165
C1175
C1148
C1158
Illuminated
C1168
Wheel-speed
C1178
sensor/sensor
C1233
rotor
C1234
C1235
C1236
Engine control
system, engine
C1119
speed signal illuminated
line
Engine coolant
U2021
temperature illuminated
ON-BOARD DIAGNOSTIC
Warning light illumination condition
BRAKE
system
warning
ABS DSC (TCS)
light
warning indicator
(when
light light
parking
brake is
released)
Not Not
Illuminated
illuminated
Not Not
Illuminated
illuminated
Not
Illuminated
illuminated
*1
*1, 2
Not Not
Illuminated
illuminated
Not Not Not
illuminated illuminated
Fail-safe function
DSC
ABS
(TCS)
control
OFF light
Not Availa-
illuminated ble
Not Availa-
illuminated ble
Illuminated
Stop
*1 *1
Not
Availa-
iluminated
ble
*22
Availa-
Illuminated
ble
Control condition
EBD TCS DSC
control control control
Availa- Availa-
Stop
ble ble
Availa- Availa-
Stop
ble ble
Availa-
Stop Stop
*3
ble
Stop Stop
Availa-
Availa-
Availa-
ble
ble
ble
*23
Stop
24 25
Stop* Stop*
Availa-
*5
Stop
Stop
ble
Brake
assist
control
Stop
P
Availa-
ble
Stop
Availa-
ble
Availa-
ble
P–19