Hyundai Accent (HC): Intelligent Variable Transmission (IVT) System (Continuously Variable Transmission) / Troubleshooting

- Troubleshooting

Limp Home Mode

Limp Home Mode features a fail-safe function that prevents dangerous situations in the event of a transmission failure. The vehicle will be driven in limp home mode if the transmission malfunctions. In this mode, the transmission operates at a minimal functionality level (fixed shifting, limited shifting, reverse, neutral), making it possible for the vehicle to reach a service center.

   

• Fail safe function : Prevents dangerous situations from developing in the event of a malfunction

• Limp home function : Maintains minimal functionality (Drive, Reverse, and Neutral) in the event of a malfunction, making it possible for the vehicle to reach a service center.

Troubleshooting
Trouble symptom Suspected areaRemedy
Poor shift qualityFaulty drive pulley speed sensorInspect the drive pulley speed sensor & connector
Faulty driven pulley speed sensorInspect the driven pulley speed sensor & connector
Faulty turbine speed sensorInspect the turbine speed sensor & connector
Faulty solenoid valveInspect the solenoid valve
Faulty CAN communicationInspect the CAN communication line & controller (TCM/ECM)
Faulty Transmission Control Module(TCM) software Inspect the TCM and replace it if necessary.
After replacement, input hydraulic characteristics and perform TCM adaptive value learning.
TCM learning not performedPerform the learning procedure again after deleting "IVT learning value"
Faulty E-module Inspect the E-module & connector
Poor hydraulic pressure controlInspect the transmission hydraulic pressure
Poor hydraulic pressure supplyCheck the fluid level
No oil characteristics input after replacement of TCM or Intelligent Variable Transmission (IVT)Input the hydraulic characteristics
Slipping in the IVT, Damaged clutch/brakeReplace the IVT
Faulty position switch Inspect the position switch & connector
Shifting shockTCM learning not performedPerform the learning procedure again after deleting "IVT learning value"
No hydraulic characteristics input after replacement of TCM or IVTPerform the TCM adaptive value learning after hydraulic characteristics input
Poor hydraulic pressure controlCheck the IVT hydraulic pressure
Poor hydraulic pressure supplyCheck the IVTF level
Improper installation of the IVTTighten the mounting bolt to the specified torque
Damaged driven/drive pulleys, clutch/brakeReplace the IVT
Abnormal noise from transmissionDamaged bearing/ parts stuck insideReplace the IVT
Low IVTF levelCheck the fluid level
IVT shifting disabledDamaged pulley chain beltReplace IVT
Damaged gear/clutch/brakeReplace IVT

Other information:

Hyundai Accent (HC) (2017 - 2022) Service Manual: Repair procedures

- Inspection Front Door Lock Module Inspection 1.Remove the front door trim.(Refer to Body - "Front Door Trim") 2.Remove the front door module.(Refer to Body - "Front Door Module") 3.Disconnect the connectors from the actuator. NoPin Information LHRH 1Motor 1Lock / UnLock switch 2Motor 2COM 3-Key Lock switch 4Key Unlock switchKey Unlock switch 5Key Lock switch- 6COMMotor 2 7Lock / UnLock switchMotor 1 4.

Hyundai Accent (HC) (2017 - 2022) Service Manual: MDPS Assembly

- Removal 1.Disconnect the battery negative cable and wait for at least three minutes before beginning work. 2.Put a flat tool (Ø4mm) into a guide hole located in the bottom of steering wheel and press a spring.     • When put a tool into a hole, make sure not to damage an airbag cusion by a tool. 3.Turn a steering wheel anti-clockwise, so make a guide hole (A) shown on the rightside.

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