Hyundai Elantra: Electronic Stability Control (ESC) / Indicator lights
When the ignition switch is placed to the ON position, the ESC indicator light illuminates, then goes off if the ESC system is operating normally.
The ESC indicator light blinks whenever the ESC is operating.
If ESC indicator light stays on, your vehicle may have a malfunction with the ESC system. When this warning light illuminates have your vehicle checked by an authorized HYUNDAI dealer as soon as possible.
The ESC OFF indicator light comes on when the ESC is turned off.
WARNING
When the ESC is blinking, this indicates the ESC is active:
Drive slowly and NEVER attempt to accelerate. NEVER turn the ESC off while the ESC indicator light is blinking or you may lose control of the vehicle resulting in an accident.
NOTICE
Driving with wheels and tires with 5 different sizes may cause the ESC system to malfunction. Before replacing tires, make sure all four tires and wheels are the same size. Never drive the vehicle with different sized wheels and tires installed.
ESC operation
ESC ON condition
When the ignition switch is in the ON position, the ESC and the ESC OFF indicator
lights illuminate for approximately three seconds. After both lights go off, the
ESC is enabled. ...
ESC OFF usage
When Driving
The ESC OFF mode should only be used briefly to help free the vehicle if stuck
in snow or mud by temporarily stopping operation of the ESC to maintain wheel torque.
To turn ESC off wh ...
Other information:
Hyundai Elantra AD (2016-2020) Service Manual: Schematic Diagrams
Schematic diagram
Terminal Function
NO.Function1-2C-CAN Low3C-CAN High4GND5IGN_16-7L-CAN Low8L-CAN High
...
Hyundai Elantra AD (2016-2020) Service Manual: CVVT Oil Control Valve (OCV) Description and Operation
Description
Continuous Variable Valve Timing (CVVT) system advances or
retards the valve timing of the intake and exhaust valve in accordance
with the ECM control signal which is calculated by the engine speed and
load.
By controlling CVVT, the valve over-lap or under-lap occurs,
which m ...
