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

Contents:

• Specifications
• Special Service Tools
• Troubleshooting
• IVT Control System
• Intelligent Variable Transmission (IVT)
• Hydraulic System

Specifications

- Service data

Item		Specification
Transmission type		Smartstream IVT
Engine type		Gasoline 1.6 MPI
Clutch type		Torque converter
Torque converter size		Ø 210mm(8.2677in.)
Oil pump type		Chain drive vane pump
Planetary gear		Double pinion planetary gear
Gear ratio	Forward	2.68 - 0.385
	Reverse	2.822 - 1.822
	Final gear ratio	4.892
Component elements	Oil pump	1 unit
	Oil filter	Main filter : 1 unit
		pressure filter : 1 unit
	Clutch	1 unit
	Brake	1 unit
	Planetary gear	1 unit
	Drive pulley	1 unit
	Driven Pulley	1 unit
	Chain belt	1 unit
	Solenoid valve	Direct Control VFS : 1 units
		Indirect Control VFS : 4 units

*IVT : Intelligent Variable Transmission *IVTF : Intelligent Variable Transmission Fluid*VFS : Variable Force SolenoidPosition Switch

Item	Specification
Power supply (V)	4.5 - 5.5 V
Output type	PWM (S1, S2), ON/OFF (Ps, Ns)

- Tightening Torques

Item	N.m	kgf.m	lb-ft
TCM mounting nut & bolt	9.8 - 11.8	1.0 - 1.2	7.2 - 8.7
Shift cable bracket mounting bolt	14.7 - 21.6	1.5 - 2.2	10.9 - 15.9
Shift cable mounting nut	9.8 - 13.7	1.0 - 1.4	7.2 - 10.1
IVT mounting bracket bolt	98.1 - 117.7	10.0 - 12.0	72.3 - 86.8
IVT support bracket mounting bolt	58.9 - 78.5	6.0 - 8.0	43.4 - 57.8
Roll rod bracket mounting bolt	49.0 - 63.7	5.0 - 6.5	36.2 - 47.0
	107.9 - 127.5	11.0 - 13.0	79.6 - 94.0
Torque converter mounting bolt	45.1 - 52.0	4.6 - 5.3	33.3 - 38.3
IVT upper mounting bolt (TM=>Eng)	42.2 - 53.9	4.3 - 5.5	31.1 - 39.8
IVT lower mounting bolt (Eng=>TM)	42.2 - 48.1	4.3 - 4.9	31.1 - 35.4
	42.2 - 53.9	4.3 - 5.5	31.1 - 39.8
Driven pulley speed sensor mounting bolt	9.8 - 11.8	1.0 - 1.2	7.2 - 8.7
Shift lever assembly mounting bolt	8.8 - 13.7	0.9 - 1.4	6.5 - 10.1
Position switch mounting bolt	9.8 - 11.8	1.0 - 1.2	7.2 - 8.7
Fluid drain plug	34.3 - 39.2	3.5 - 4.0	25.3 - 28.9
Starter mounting bolt	49.0 - 63.7	5.0 - 6.5	36.2 - 47.0
Electric Oil Pump(EOP) mounting bolts	19.6 - 26.5	2.0 - 2.7	14.5 - 19.5

- Lubricants

IVTF Grade	Recommended	Allowed
	SP-CVT1	The list of transmission fluid approved by Hyundai : MICHANG SP-CVT1
IVTF  Quantity	6.5L (1.71 U.S gal., 6.86 U.S.qt., 5.72 Imp.qt.)

   

• Be sure to use the genuine Intelligent Variable Transmission Fluid(IVTF) (SP-CVT1).

• When replacing with non-genuine IVTF, bad shift and vibration may occur, causing damamge to the Intelligent Variable Transmission (IVT).

• Non-genuine IVT fluid includes after market IVT fluid indicated as interchangeable with genuine Hyundai fluid.

Special Service Tools

- Special Service Tools

Tool Name / Number	Illustration	Description
Engine support fixture (bar) 09200-3N000		Used for holding engine assembly when removing / installing transmission
Engine support fixture (adapter) 09200-4X000		Used for holding engine assembly when removing / installing transaxle Used with the bar (09200-3N000) and supporter (09200-2S000) ※ Refer to the engine support fixture assembly drawing below.
Oil seal installer 09452-26100		Installation of transaxle case oil seal. Used with the handle (09231-H1100)
Handle 09231-H1100		Installation of transaxle case oil seal. Used with the installer (09452-26100)
Position switch guide pin 09480-A3800		Used for fixing "N" range when installing inhibitor switch

※ Engine support fixture special tool assembly drawing

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 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

IVT Control System ➤

Intelligent Variable Transmission (IVT) ➤

Hydraulic System ➤