Hyundai Elantra: DCT(Dual Clutch Transmission) System / Troubleshooting

Hyundai Elantra (CN7) 2021-2025 Service Manual / DCT(Dual Clutch Transmission) System / Troubleshooting

Troubleshooting

Trouble symptom	Probable cause	Remedy
Displayed the warning lamp "E" (Driving is only possible with 1/ R gear)	Not performed DCT learning	Perform the DCT manual learning procedure.
Impossible to driving with odd gear	Clutch actuator (Clutch motor 1 or position sensor 1 failure)	Replace the clutch actuator assembly.
	Gear actuator (Shift motor 1 or position sensor 1 failure, select solenoid 1 or position sensor 1 failure)	Replace the gear actuator assembly.
	Input speed sensor 1 failure	Replace the input speed sensor.
	Faulty gears (1, 3, 5, 7)	Replace the gear.
	Faulty clutch 1	Replace the dual clutch assembly.
	Faulty engagement bearing 1	Replace the Engagement Bearing Assembly
Impossible to driving with even gear	Clutch actuator (Clutch motor 2 or position sensor 2 failure)	Replace the clutch actuator assembly.
	Gear actuator (Shift motor 2 or position sensor 2 failure, select solenoid 2 or position sensor 2 failure)	Replace the gear actuator assembly.
	Input speed sensor 2 failure	Replace the input speed sensor.
	Faulty gears (2, 4, 6, R)	Replace the gear.
	Faulty clutch 2	Replace the dual clutch assembly.
	Faulty engagement bearing 2	Replace the Engagement Bearing Assembly
Impossible to driving	TCM failure	Replace the TCM.
	Odd / even system simultaneous failure	Replace the dual clutch assembly or gear.
	Inhibitor switch / shift lever sensor simultaneous failure	Replace the inhibitor switch.
Impossible to manual mode	Inhibitor switch failure	Replace the inhibitor switch.
	Shift lever sensor failure	Replace the shift lever.
	Manual mod switch failure	Replace the manual mod switch housing.
noise	Oil level (Low)	Refill the oil with transmission after inspecting the parts (Oil seal, Drain plug, Filler plug).
	Oil (Wrong)	Replace the oil.
	Synchronizer ring (Worn or damaged)	Replace the synchronizer ring.
	Gear (Worn or damaged)	Replace the gear.
	Bearing (Worn or damaged)	Replace the bearing.
Oil leak	Oil level (High)	Inspect the oil level.
	Gasket (Damaged)	Replace the gasket.
	Oil seal (Worn or damaged)	Replace the oil seal.
Hard shifting or impossible to shift	Oil (Wrong)	Replace the oil.
	Shift fork (Worn)	Replace the shift fork.
	Synchronizer ring (Worn or damaged)	Replace the synchronizer ring.
	Gear (Worn or damaged)	Replace the gear.
	Hub sleeve (Worn or damaged)	Replace the hub sleeve.

Special service tools

Special Service Tools Tool (Number and Name) Illustration Use 09200-3N000Engine support fixture(Beam)Removal and installation of the transmission...

Dual Clutch Transmission Assembly

Other information:

Hyundai Elantra (CN7) 2021-2025 Owner's Manual: Function malfunction and limitations

System malfunction When Highway Driving Assist or Highway Lane Change function is not working properly, the ‘Check Highway Driving Assist (HDA) system’ warning message will appear, and the warning light will illuminate on the cluster. We recommend that the function be inspected by an authorized HYUNDAI dealer. WARNING The driver is responsible for controlling the vehicle for safe..

Hyundai Elantra (CN7) 2021-2025 Service Manual: Brake Booster

Components and components location Components1. Reservoir cap2. Reservoir3. Brake fluid lever sensor4. Master cylinder5. Brake booster6. Push road Repair procedures Brake Booster Operating Test1.Start the engine for 1 - 2 minutes and stop. If the brake stroke gradually reduces when the brake is pressed for several times, it means it works properly. But if the brake stroke doesn't chang..

Side air bags

Front seat

Your vehicle is equipped with a side air bag in each front seat. The purpose of the air bag is to provide the vehicle’s driver and the front passenger with additional protection than that offered by the seat belt alone.