The Electronic Stability Control
(ESC) system is an advanced safety
feature that builds on the functions
of ABS and TCS. It includes sensors
like the yaw rate sensor, lateral
acceleration sensor, and steering
wheel angle sensor. These sensors
help monitor and control the driving
and braking forces of all wheels-
front, rear, left, and right-through a
computer (ECU). This ensures the
vehicle stays stable during turns and
manoeuvres. If the driver pushes the
limits, especially during high-speed
turns, the ESC system steps in
automatically to regain control and
keep the vehicle safe.
Indicators relevant to the ESC
system consist of ABS MIL, EBD MIL,
ESC MIL and ESC OFF indicator.
1) Indicators illuminate for self-
inspect when the instrument is
turned on. The 4 indicators are
normally on for 3s, indicating that
the ESC system is conducting
self-inspect and indicators work
normally. The 4 indicators go out
3s later under the normal
condition.
Electronic stability control
(ESC)
When faults (such as neglected
installation, loosened connector,
abnormal CAN communication)
exist on the ESC system, only the
ESC OFF lamp will go out 3s later,
and the other 3 lamps are normally
2) In the process of driving, if the
ESC function is activated, the
ESC lamp will flicker, telling the
user that the ESC system is
working. If the ESC system
functions are abnormal but the
ABS+EBD system functions are
normal, the ESC lamp is normally
on, indicating that the ESC
system gets faulted. If the ESC
system and the ABS function are
abnormal and the EBD system
functions are normal, the ESC
lamp and the ABS lamp are
normally on.
3) The ESC OFF lamp is used to
indicate that the ESC function is
disabled (the lamp will be
normally on so long as the ESC
function is disabled; the lamp will
go out if the function is enabled).
2
S a f e t y S y s t e m s
2-33
BRAKE SYSTEM
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