Hyundai Elantra: Maintenance / Engine Coolant

Hyundai Elantra (CN7) 2021-2025 Owner's Manual / Maintenance / Engine Coolant

The high-pressure cooling system has a reservoir filled with year-round antifreeze coolant. The reservoir is filled at the factory.

Check the antifreeze protection and coolant level at least once a year, at the beginning of the winter season and before traveling to a colder climate.

NOTICE

When the engine overheats from low engine coolant, suddenly adding engine coolant may cause cracks in the engine. To prevent damage, add engine coolant slowly in small quantities.
Do not drive with no engine coolant. It may cause water pump failure and engine seizure, etc.

Engine Oil

Checking the Engine Oil Level 1. Follow all of the oil manufacturer’s precautions. 2. Be sure the vehicle is on the level ground in P (Park) with the parking brake set...

Checking the Engine Coolant Level

Check the condition and connections of all cooling system hoses and heater hoses. Replace any swollen or deteriorated hoses. The coolant level should be filled between the F and the L marks on the side of the coolant reservoir when the engine is cool...

Other information:

Hyundai Elantra (CN7) 2021-2025 Service Manual: Heater & A/C Control Unit (DATC)

Components and components location Components[This illustration shows the LHD type. RHD type is symmetrical.][Connector A] Pin No Function Pin No Function 1Battery9IGN22ILL+ (TAIL)10ISG Battery (+)3-11IGN14LIN BUS12HTD5-13-6-14-7-15-8RHEO (ILL-)16Ground Repair procedures Self Diag..

Hyundai Elantra (CN7) 2021-2025 Service Manual: ESC OFF Switch

Description and operation Description1.The ESP OFF switch is for the user to turn off the ESP system.2.The ESP OFF lamp is on when ESP OFF switch is engaged. Repair procedures Removal1.Turn ignition switch OFF and disconnect the negative (-) battery cable.2.Remove the crash pad lower pannel.(Refer to Body - "Crash Pad Lower Pannel")3.Loosen the screw and than removing the ESC OFF switc..

Air bag collision sensors

1. SRS control module/Rollover sensor
2. Front impact sensors
3. Side impact sensors (acceleration)
4. Side impact sensors (pressure)