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

Hyundai Accent (HC) (2017 - 2022) Service Manual / 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

Specifications

IVT Control System

Other information:

Hyundai Accent (HC) (2017 - 2022) Service Manual: Schematic Diagrams

- Schematic Diagrams - Termianal function Wire NoDesignationCurrent maxmin 13Ground for recirculation pump39A10A 1Voltage supply for pump motor39A10A 25Voltage supply for solenoid valves15A2A 38Ground for solenoid valves and ECU15A2A 22Signal wheel speed sensor FL16.8 mA5.9 mA 33Voltage supply for the active wheel speed sensor RL16.

Hyundai Accent (HC) (2017 - 2022) Service Manual: Transmission Control Module (TCM)

- Components 1. Transmission control module (TCM) - Description The module receives and processes signals from various sensors and implements a wide range of transmission controls to ensure optimal driving conditions for the driver.Functions • Monitors the vehicle's operating conditions to determine the optimal gear setting. • Performs a gear change if the current gear setting differs from the identified optimal gear setting.

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