Safety precautions when working with the fuel injection device (Hyundai Elantra J1)

Only start the engine with the battery terminals securely tightened.

Do not use any quick chargers instead of the battery.

When quickly charging the battery, disconnect it from the vehicle's electrical system.

Before checking the injection device, check the operation of the ignition system (ignition timing and spark plugs).

Check the connector connection reliability.

Do not disconnect the battery while the engine is running.

Remove the control unit at temperatures above 80°C (drying in a paint booth).

When the ignition is on, do not disconnect or connect the control unit connector.

When checking compression, disconnect power to the fuel pump relay.