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
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.
| Trouble symptom | Suspected area | Remedy |
| Poor shift quality | Faulty drive pulley speed sensor | Inspect the drive pulley speed sensor & connector |
| Faulty driven pulley speed sensor | Inspect the driven pulley speed sensor & connector | |
| Faulty turbine speed sensor | Inspect the turbine speed sensor & connector | |
| Faulty solenoid valve | Inspect the solenoid valve | |
| Faulty CAN communication | Inspect 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 performed | Perform the learning procedure again after deleting "IVT learning value" | |
| Faulty E-module | Inspect the E-module & connector | |
| Poor hydraulic pressure control | Inspect the transmission hydraulic pressure | |
| Poor hydraulic pressure supply | Check 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/brake | Replace the IVT | |
| Faulty position switch | Inspect the position switch & connector | |
| Shifting shock | TCM learning not performed | Perform the learning procedure again after deleting "IVT learning value" |
| No hydraulic characteristics input after replacement of TCM or IVT | Perform the TCM adaptive value learning after hydraulic characteristics input | |
| Poor hydraulic pressure control | Check the IVT hydraulic pressure | |
| Poor hydraulic pressure supply | Check the IVTF level | |
| Improper installation of the IVT | Tighten the mounting bolt to the specified torque | |
| Damaged driven/drive pulleys, clutch/brake | Replace the IVT | |
| Abnormal noise from transmission | Damaged bearing/ parts stuck inside | Replace the IVT |
| Low IVTF level | Check the fluid level | |
| IVT shifting disabled | Damaged pulley chain belt | Replace IVT |
| Damaged gear/clutch/brake | Replace IVT |
Other information:
Hyundai Accent (HC) (2017 - 2022) Service Manual: Specifications
- Specification EngineTransaxleJoint type Max. permissible angle OuterInnerOuterInner GAMMA 1.6AT / MTBJ#22TJi#2246.5°23° - Tightening torque Item N.mkgf.mlb-ft FrontHub nuts107.9 - 127.511.0 - 13.079.6 - 94.0 Driveshaft caulking nut274.6 - 294.228.0 - 30.0202.5 - 217.0 Strut assembly to knuckle98.1 - 117.710.0 - 12.072.3 - 86.8 Front caliper to knuckle78.Hyundai Accent (HC) (2017 - 2022) Service Manual: Repair procedures
- Removal • Put on gloves to protect your hands. • Use seat covers to avoid damaging any surfaces. 1.Remove the roof garnish.(Refer to Body Side Molding - "Roof Garnish") 2.Remove the rear pillar trim. (Refer to Interior Trim - "Rear Pillar Trim") 3.Spread the WD - 40 on the side of rear window glass.
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