If the Engine Doesn't Turn Over or Turns Over Slowly
Do not push or pull the vehicle to start it. This could cause damage to your vehicle. See instructions for "Jump Starting" provided in this chapter.
CAUTION
Push or pull starting the vehicle may cause the catalytic converter to overload which can lead to damage to the emission control system.
If the Engine Turns Over Normally but Doesn't Start
Check the fuel level and add fuel if necessary.
If the engine still does not start, have your vehicle checked by an authorized HYUNDAI dealer.
Hyundai Elantra AD (2016-2020) Service Manual: Head Lamps Repair procedures
Head Lamp Aiming Instructions
[Mechanical Aiming]
The head lamps should be aimed with the proper beam-setting
equipment, and in accordance with the equipment manufacturer's
instructions.
•
If there are any regulations pertinent to the aiming of head
lamps in the ...
Hyundai Elantra AD (2016-2020) Service Manual: Heated Oxygen Sensor (HO2S) Repair procedures
Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the HO2S connector.
3.
Measure resistance between the HO2S terminals 2 and 5 [B1/S1].
Measure resistance between the HO2S terminals 3 and 4 [B1/S2].
4.
Check that the resistance is within the specification.
Specification : ...