Hyundai Elantra AD (2016-2020) Owners Manual: 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 s ...
Hyundai Elantra AD (2016-2020) Service Manual: Engine Control Module (ECM) Repair procedures
Removal
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When replacing the ECM, the vehicle equipped withthe immobilizer must be performed procedure asbelow.
[In the case of installing used ECM]
1) Perform "ECM Neutral mode" procedure with GDS.
(Refer to Body Electrical System - "Immobilizer System")
2) After ...