Hyundai Elantra AD: Automatic Transaxle Control System

Sixth generation (AD; 2017–2020) / Hyundai Elantra AD 2017-2020 Service Manual / Automatic Transaxle System / Automatic Transaxle Control System

Description and Operation

Description

•	Automatic transaxle system relies on various measurement data to determine the current control status and extrapolate the necessary compensation values.

•	These values are used to control the actuators and achieve the desired control output.

•	If a problem with the drivetrain, including the transaxle, has been identified, perform self-diagnosis and basic transaxle inspection (oil and fluid inspection) and then check the control system's components using the diagnosis tool.

Control System Composition

Schematic Diagrams

Circuit Diagram

Repair procedures

Adjustment

Transaxle Control Module(TCM) Learning

When shift shock is occurred or parts related with the transaxle are replaced, TCM learning should be performed.

In the following case, TCM learning is required.

•	Transaxle assembly replacement

•	TCM replacement

•	TCM upgrading

TCM learning procedure

1.	Automatic Transaxle Fluid (ATF) temperature: 40 ~ 100 °C (104 ~ 212 °F)

2.	Static learning Repeat the below shift pattern four times or more with stepping on the brake.

3.	Driving learning Drive the vehicle from a stop in D through all gears 1st, 2nd, 3rd, 4th, 5th and 6th gear while holding the throttle steady at the specified Throttle Position Sensor (TPS) value (15 ~ 25%).

Transaxle Control Module (TCM) Description and Operation

Description

•	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.

•	Determines the need for Damper Clutch (D/C) activation and engages the clutch accordingly.

•	Calculates the optimal line pressure level by constantly monitoring the torque level and adjusts the pressure accordingly.

•	Diagnoses the automatic transaxle for faults and failures.

Transaxle Control Module (TCM) Schematic Diagrams

TCM Connector and Terminal Function

TCM Terminal Function

Connector [A]		Connector [K]
Pin	Description	Pin	Description
A1	Overdrive clutch control solenoid valve (OD/C_VFS)	K8	FLEXRAY COMM. Signal HIGH
A5	Torque converter control solenoid (T/CON_VFS)	K25	FLEXRAY COMM. Signal LOW
A6	Pressure control solenoid (VFS-LINE)	K59	CCP CAN LOW
A7	26 brake control solenoid valve (26/B_VFS)	K60	CAN (LOW)
A8	Inhibitor switch signal "S2"	K76	CCP CAN HIGH
A9	Sports mode down switch	K77	CAN (HIGH)
A10	Sports mode up switch
A22	Underdrive brake control solenoid valve (UD/B_VFS)
A26	35R clutch control solenoid valve (35R/C_VFS)
A27	Inhibitor switch signal "S1"
A30	Sports mode select switch
A43	Solenoid power 1 (A1, A5, A26, A48)
A44	Solenoid power 2 (A6, A7, A22, A47)
A45	GND (Power)
A46	GND (Power)
A47	ON/OFF solenoid valve B (SS-B)
A48	ON/OFF solenoid valve A (SS-A)
A49	Oil temperature sensor (-)
A64	VB (Battery voltage)
A68	Shift lock solenoid control
A70	Inhibitor switch signal "S3"
A72	Input speed sensor signal
A73	Output speed sensor power
A85	VB (Battery voltage)
A91	Oil temperature sensor (+)
A92	Output speed sensor signal
A93	Inhibitor switch signal "S4"
A94	Input speed sensor power

TCM Terminal input/ output signal

Pin	Description	Condition	Input/output value
			Type	Level
A1	Overdrive clutch control solenoid valve (OD/C_VFS)	-	Output	0V/Battery voltage level
				9V < Battery voltage level < 16V
A5	Torque converter control solenoid valve (T/CON_VFS)	-	Output	0V/Battery voltage level
				9V < Battery voltage level < 16V
A6	Line pressure control solenoid valve (LINE_VFS)	-	Output	0V/Battery voltage level
				9V < Battery voltage level < 16V
A7	26 brake control solenoid valve (26/B_VFS)	-	Output	0V/Battery voltage level
				9V < Battery voltage level < 16V
A8	Inhibitor switch signal "S2"	High	Input	0V/Battery voltage level
		Low		9V < Battery voltage level < 16V
A9	Sports mode down switch	Down ON	Input	0V/Battery voltage level
		Other		9V < Battery voltage level < 16V
A10	Sports mode up switch	Up ON	Input	0V/Battery voltage level
		Other		9V < Battery voltage level < 16V
A22	Underdrive brake control solenoid valve (UD/B_VFS)	-	Output	0V/Battery voltage level
				9V < Battery voltage level < 16V
A26	35R clutch control solenoid valve (35R/C_VFS)	-	Output	0V/Battery voltage level
				9V < Battery voltage level < 16V
A27	Inhibitor switch signal "S1"	High	Input	0V/Battery voltage level
		Low		9V < Battery voltage level < 16V
A30	Sports mode select switch	Sport mode	Input	0V/Battery voltage level
		Other		9V < Battery voltage level < 16V
A43	Solenoid power 1 (A1, A5, A26, A48)		Power	0V/Battery voltage level
				9V < Battery voltage level < 16V
A44	Solenoid power 2 (A6, A7, A22, A47)		Power	0V/Battery voltage level
				9V < Battery voltage level < 16V
A47	ON/OFF solenoid valve B (SS-B)	High	Output	0V/Battery voltage level
		Low		9V < Battery voltage level < 16V
A48	ON/OFF solenoid valve A (SS-A)	High	Output	0V/Battery voltage level
		Low		9V < Battery voltage level < 16V
A49	Oil temperature sensor (-)	-	Ground	0V
A70	Inhibitor switch signal "S3"	High	Input	0V/Battery voltage level
		Low		9V < Battery voltage level < 16V
A72	Input speed sensor signal	High	Input	0.7V/1.4V
		Low
A73	Output speed sensor power	ON	Power	0V/7.5V
		OFF
A91	Oil temperature sensor (+)	ON	Input	0V/3.3V
		OFF
A92	Output speed sensor signal	High	Input	0.7V/1.4V
		Low
A93	Inhibitor switch signal "S4"	High	Input	0V/Battery voltage level
		Low		9V < Battery voltage level < 16V
A94	Input speed sensor power	ON	Power	0V/7.5V
		OFF

Circuit Diagram

[Inhibitor switch]

Transaxle Control Module (TCM) Repair procedures

Inspection

Transaxle Control Module(TCM) Problem Inspection Procedure

TEST TCM GROUND CIRCUIT: Measure resistance between TCM and chassis ground using the backside of TCM harness connector as TCM side check point. If the problem is found, repair it.

Specification: Below 1?

2.	TEST TCM CONNECTOR: Disconnect the TCM connector and visually check the ground terminals on TCM side and harness side for bent pins or poor contact pressure. If the problem is found, repair it.

3.	If problem is not found in Step 1 and 2, the TCM could be faulty. If so, make sure there were no DTC's before swapping the TCM with a new one, and then check the vehicle again. If DTC's were found, examine this first before swapping TCM.

RE-TEST THE ORIGINAL TCM: Install the original TCM (may be broken) into a known-good vehicle and check the vehicle. If the problem occurs again, replace the original TCM with a new one. If problem does not occur, this is intermittent problem (Refer to “Intermittent Problem Inspection Procedure” in Basic Inspection Procedure).

Removal

1.	Oil-pressure characteristics backup (TCM exchange)

2.	Turn ignition switch OFF.

3.	Disconnect the negative (-) battery cable.

4.	Remove the air cleaner assembly and air duct.(Refer to Engine Mechanical System - "Air cleaner")

5.	Disconnect the TCM connector (A).

6.	Remove the fixing clip (A) of wiring.

7.	Remove the TCM (B).

Installation

1.	To install, reverse the removal procedure.

2.	Oil-pressure characteristics input (TCM exchange)

3.	Perform the procedures related in the ECM after replacing the TCM. (Refer to Engine Control / Fuel System - "Engine Control Module")

4.	Perform TCM learning after replacing the transaxle to prevent slow transaxle response, jerky acceleration and jerky startup. (Refer to Automatic Transaxle Control System - "Repair procedures")

Transaxle Oil Temperature Sensor Description and Operation

Description

•	Transaxle oil temperature sensor monitors the automatic transaxle fluid's temperature and conveys the readings to TCM.

•	It is an NTC (Negative Thermal Coefficient) sensor whose resistance has an inversely proportional relationship with the temperature level.

•	Data produced by this sensor is used to identify damper clutch activation and deactivation zones within the low temperature and high temperature range and to compensate hydraulic pressure levels during gear changes.

Transaxle Oil Temperature Sensor Specifications

Specifications

? Type: Negative Thermal Coefficient Type

Temp.[(°C)°F]	Resistance (?)	Min	Max
(-40) -40	48153	45301	51006
(-20) -4.0	15614	14785	16443
(0) 32.0	5887	5605	6168
(20) 68.0	2510.6	2401.9	2619.3
(40) 104.0	1199.6	1152.4	1246.7
(60) 140.0	612.3	590.3	634.2
(80) 176.0	329.5	318.7	340.3
(100) 212.0	186	180.4	191.6
(120) 248.0	109.7	106.1	113.2
(140) 284.0	67.16	64.82	69.5
(150) 302.0	53.24	51.32	55.16

Transaxle Oil Temperature Sensor Schematic Diagrams

Circuit Diagram

Transaxle Oil Temperature Sensor Repair procedures

Inspection

1.	Turn ignition switch OFF.

2.	Remove the battery and battery tray.

3.	Disconnect the solenoid valve connector (A).

4.	Measure resistance between sensor signal terminal and sensor ground terminal.

Check that the resistance is within the specification.

•	If DTC about the input/output speed sensor is found, replace according to the procedures removal/installation.

Removal

1.	Remove the air cleaner assembly and air duct. (Refer to Engine Mechanical System - "Air cleaner")

Remove the drain plug (A) and drain the ATF totally and then reinstall the drain plug.

•	Replace the gasket before reinstalling the drain plug.

•	After the installation, start the engine and then check if there are any leakages from the drain plug.

3.	Remove the wiring mounting clip (A).

Disconnect the air breather hose (B) from the valve body cover.

Tightening torque :

9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

Disconnect the hose (A) after removing the automatic transaxle fluid cooler hose clamp.

•	Carefully install the clamp not to damage the hose.

•	Install the clamp in a correct direction not to be interfered with other parts.

•	After the installation, start the engine and then check if there are any leakages from the hose.

6.	Disconnect the ATF warmer hose (A).

Remove the mounting bolt of the heater pipe.

•	Carefully install the clamp not to damage the hose.

•	Install the clamp in a correct direction not to be interfered with other parts.

•	After the installation, start the engine and then check if there are any leakages from the hose.

Remove the valve body cover (A).

Tightening torque :

11.8 ~ 13.7 N.m (1.2 ~ 1.4 kgf.m, 8.7 ~ 10.1 lb-ft)

•	Replace the gasket (A) before reinstalling the valve body cover.

•	After the installation, start the engine and then check if there are any leakages from the valve body cover.

Disconnect the oil temperature sensor and solenoid valve connector (A) from the valve body.

Tightening torque :

9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

•	Check for the looseness, poor connection, bending, corrosion, contamination, deterioration, or damage before reinstalling the solenoid valve connector.

10.

Remove the valve body assembly (A).

Tightening torque :

9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

11.	Disconnect the input & output speed sensor connector (A).

12.

Loosen the main connctor bolt (B).

Tightening torque :

9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

13.	Disconnect the solenoid valve connector (A).

14.	Remove the solenoid valve connector mounting clip (A).

15.

Remove the solenoid valve connector (A) by pushing down from the transaxle.

•	Replace the O-Ring(A) before reinstalling solenoid valve connector.

Installation

1.	To install, reverse the removal procedure.

2.	Check fluid level, after filling the automatic transaxle with fluid. (Refer to Hydraulic System - "Fluid")

Input Speed Sensor Description and Operation

Description

Input speed sensor is a vital unit that measures the rate of rotation of the input shaft inside the transaxle and delivers the readings to the TCM. The sensor provides critical input data that's used in feedback control, damper clutch control, gear setting control, line pressure control, clutch activation pressure control, and sensor fault analysis.

Input Speed Sensor Specifications

Specifications

? Type: Hall effect sensor

? Specifications

Items		Specifications
Operation condition [°C(°F)]		(-40 ~ 150) -40 ~ 302
Output voltage(V)	High	1.18 ~ 1.68
	Low	0.59 ~ 0.84

Input Speed Sensor Schematic Diagrams

Circuit Diagram

Input Speed Sensor Repair procedures

Inspection

Using the GDS, check the input/output speed sensor waveforms.

A.	Turn OFF the ignition switch.

B.	Connect the GDS to the Data Link Connector(DLC) on the lower crash pad.

C.	Ignition "ON" & Engine "ON".

D.	Check the input/output speed sensor waveforms at high speed and low speed.

Fig 1) Input/Output speed sensor at low speed

Fig 2) Input/Output speed sensor at high speed

Removal

1.	Remove the air cleaner assembly and air duct. (Refer to Engine Mechanical System - "Air cleaner")

Remove the drain plug (A) and drain the ATF totally and then reinstall the drain plug.

•	Replace the gasket before reinstalling the drain plug.

•	After the installation, start the engine and then check if there are any leakages from the drain plug.

3.	Remove the wiring mounting clip (A).

Disconnect the air breather hose (B) from the valve body cover.

Tightening torque :

9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

Disconnect the hose (A) after removing the automatic transaxle fluid cooler hose clamp.

•	Carefully install the clamp not to damage the hose.

•	Install the clamp in a correct direction not to be interfered with other parts.

•	After the installation, start the engine and then check if there are any leakages from the hose.

6.	Disconnect the ATF warmer hose (A).

Remove the mounting bolt of the heater pipe.

•	Carefully install the clamp not to damage the hose.

•	Install the clamp in a correct direction not to be interfered with other parts.

•	After the installation, start the engine and then check if there are any leakages from the hose.

Remove the valve body cover (A).

Tightening torque :

11.8 ~ 13.7 N.m (1.2 ~ 1.4 kgf.m, 8.7 ~ 10.1 lb-ft)

•	Replace the gasket (A) before reinstalling the valve body cover.

•	After the installation, start the engine and then check if there are any leakages from the valve body cover.

Disconnect the oil temperature sensor and solenoid valve connector (A) from the valve body.

Tightening torque :

9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

•	Check for the looseness, poor connection, bending, corrosion, contamination, deterioration, or damage before reinstalling the solenoid valve connector.

10.

Remove the valve body assembly (A).

Tightening torque :

9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

11.	Disconnect the input & output speed sensor connector (A).

12.

Remove the input & output speed sensor (A) after removing the bolts(2ea).

Tightening torque :

9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

Installation

1.	To install, reverse the removal procedure.

2.	Check fluid level after filling the automatic transaxle with fluid. (Refer to Hydraulic System - "Fluid")

Output Speed Sensor Description and Operation

Description

The output speed sensor is a vital unit that measures the rate of rotation of the transaxle's turbine shaft and output shaft, and delivers the readings to the TCM. The sensor provides critical input data that's used in feedback control, damper clutch control, gear setting control, line pressure control, clutch activation pressure control, and sensor fault analysis.

Output Speed Sensor Specifications

Specifications

? Type: Hall effect sensor

? Specifications

Items		Specifications
Operation condition [°C(°F)]		(-40 ~ 150) -40 ~ 302
Output voltage(V)	High	1.18 ~ 1.68
	Low	0.59 ~ 0.84

Output Speed Sensor Schematic Diagrams

Circuit Diagram

Output Speed Sensor Repair procedures

Inspection

Using the GDS, check the input/output speed sensor waveforms.

A.	Turn OFF the ignition switch.

B.	Connect the GDS to the Data Link Connector(DLC) on the lower crash pad.

C.	Ignition "ON" & Engine "ON".

D.	Check the input/output speed sensor waveforms at high speed and low speed.

Fig 1) Input/Output speed sensor at low speed

Fig 2) Input/Output speed sensor at high speed

Removal

1.	Remove the air cleaner assembly and air duct. (Refer to Engine Mechanical System - "Air cleaner")

Remove the drain plug (A) and drain the ATF totally and then reinstall the drain plug.

•	Replace the gasket before reinstalling the drain plug.

•	After the installation, start the engine and then check if there are any leakages from the drain plug.

3.	Remove the wiring mounting clip (A).

Disconnect the air breather hose (B) from the valve body cover.

Tightening torque :

9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

Disconnect the hose (A) after removing the automatic transaxle fluid cooler hose clamp.

•	Carefully install the clamp not to damage the hose.

•	Install the clamp in a correct direction not to be interfered with other parts.

•	After the installation, start the engine and then check if there are any leakages from the hose.

6.	Disconnect the ATF warmer hose (A).

Remove the mounting bolt of the heater pipe.

•	Carefully install the clamp not to damage the hose.

•	Install the clamp in a correct direction not to be interfered with other parts.

•	After the installation, start the engine and then check if there are any leakages from the hose.

Remove the valve body cover (A).

Tightening torque :

11.8 ~ 13.7 N.m (1.2 ~ 1.4 kgf.m, 8.7 ~ 10.1 lb-ft)

•	Replace the gasket (A) before reinstalling the valve body cover.

•	After the installation, start the engine and then check if there are any leakages from the valve body cover.

Disconnect the oil temperature sensor and solenoid valve connector (A) from the valve body.

Tightening torque :

9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

•	Check for the looseness, poor connection, bending, corrosion, contamination, deterioration, or damage before reinstalling the solenoid valve connector.

10.

Remove the valve body assembly (A).

Tightening torque :

9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

11.	Disconnect the input & output speed sensor connector (A).

12.

Remove the input & output speed sensor (A) after removing the bolts(2ea).

Tightening torque :

9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

Installation

1.	To install, reverse the removal procedure.

2.	Check fluid level after filling the automatic transaxle with fluid. (Refer to Hydraulic System - "Fluid")

Torque Converter Control Solenoid Valve (T/CON_VFS) Description and Operation

Description

•	Torque converter control solenoid valve (T/CON_VFS) is attached to the valve body.

•	This variable force solenoid valve indirectly controls the hydraulic pressure inside the torque converter.

Torque Converter Control Solenoid Valve (T/CON_VFS) Specifications

Specifications

? Control type : Normally low type

Shape	Items	Specifications
	Control current(voltage) [mA]	0 ~ 850
	Supply pressure [kpa (kgf/cm?, psi)]	539.36 (5.5, 78.23)
	Control pressure [kpa (kgf/cm?, psi)]	0~519.75 (0~5.3, 0~75.38)
	Internal resistance(?)	4.8 ~5.4

Torque Converter Control Solenoid Valve (T/CON_VFS) Components and Components Location

Components Location

1. 26 Brake Control Solenoid Valve (26/B)
2. 35R Clutch Control Solenoid Valve (35R/C)
3. Underdrive Brake Control Solenoid Valve (UD/B)
4. Overdrive Clutch Control Solenoid Valve (OD/C)

5. SS-A Solenoid Valve (ON/OFF)
6. Torque Converter Control Solenoid Valve (T/CON)
7. Line Pressure Control Solenoid Valve
8. Oil temperature sensor

Torque Converter Control Solenoid Valve (T/CON_VFS) Schematic Diagrams

Circuit Diagram

Torque Converter Control Solenoid Valve (T/CON_VFS) Repair procedures

Inspection

1.	Turn ignition switch OFF.

2.	Remove the battery and battery tray. (Refer to Engine Electrical System - "Battery")

3.	Disconnect the solenoid valve connector (A).

4.	Measure resistance between sensor signal terminal and sensor ground terminal.

5.	Check that the resistance is within the specification.

Replacement

If necessary replace the valve body or solenoid valves, hydraulic adjustment is needed, replace the automatic transaxle assembly.

After the automatic transaxle assembly exchange, input the hydraulic calibration information of TCM.

1.	Perform the oil pressure characteristics input procedure. • Oil pressure characteristics(bar code) location • Oil-pressure characteristics input (Transmision exchange)

Installation

1.	To install, reverse the removal procedure.

2.	Check fluid level after filling the automatic transaxle with fluid. (Refer to Hydraulic System - "Fluid")

3.	Perform the TCM adaptive values learning procedure. (Refer to Automatic Transaxle Control System - "Repair procedures")

26 Brake Control Solenoid Valve(26/B_VFS) Description and Operation

Description

•	26 brake control solenoid valve(26/B_VFS) is attached to the valve body.

•	This variable force solenoid valve directly controls the hydraulic pressure inside the 26Brake.

26 Brake Control Solenoid Valve(26/B_VFS) Specifications

Specifications

Shape	Items	Specifications
	Control current(voltage) [mA]	0 ~ 1100
	Supply pressure [kpa (kgf/cm?, psi)]	1569.06 (16, 227.57)
	Control pressure [kpa (kgf/cm?, psi)]	0 ~ 1569.06 (0 ~ 16, 0 ~ 227.57)
	Internal resistance(?)	5.0 ~ 5.6

26 Brake Control Solenoid Valve(26/B_VFS) Components and Components Location

Components Location

1. 26 Brake Control Solenoid Valve (26/B)
2. 35R Clutch Control Solenoid Valve (35R/C)
3. Underdrive Brake Control Solenoid Valve (UD/B)
4. Overdrive Clutch Control Solenoid Valve (OD/C)

5. SS-A Solenoid Valve (ON/OFF)
6. Torque Converter Control Solenoid Valve (T/CON)
7. Line Pressure Control Solenoid Valve
8. Oil temperature sensor

26 Brake Control Solenoid Valve(26/B_VFS) Schematic Diagrams

Circuit Diagram

26 Brake Control Solenoid Valve(26/B_VFS) Repair procedures

Inspection

1.	Turn ignition switch OFF.

2.	Remove the battery and battery tray. (Refer to Engine Electrical System - "Battery")

3.	Disconnect the solenoid valve connector (A).

4.	Measure resistance between sensor signal terminal and sensor ground terminal.

5.	Check that the resistance is within the specification.

Replacement

If necessary replace the valve body or solenoid valves, hydraulic adjustment is needed, replace the automatic transaxle assembly.

After the automatic transaxle assembly exchange, input the hydraulic calibration information of TCM.

1.	Perform the oil pressure characteristics input procedure. • Oil pressure characteristics(bar code) location • Oil-pressure characteristics input (Transmision exchange)

Line Pressure Control Solenoid Valve Description and Operation

Description

•	Line pressure control solenoid valve is attached to the valve body.

•	This variable force solenoid valve indirectly controls the hydraulic pressure inside the line pressure.

Line Pressure Control Solenoid Valve Specifications

Specifications

? Control type : Normally high type

Shape	Items	Specifications
	Control current(voltage) [mA]	0 ~ 850
	Supply pressure [kpa (kgf/cm?, psi)]	539.36 (5.5, 78.23)
	Control pressure [kpa (kgf/cm?, psi)]	0 ~ 519.75 (0 ~ 5.3, 0 ~ 75.38)
	Internal resistance(?)	4.8 ~ 5.4

Line Pressure Control Solenoid Valve Components and Components Location

Components Location

1. 26 Brake Control Solenoid Valve (26/B)
2. 35R Clutch Control Solenoid Valve (35R/C)
3. Underdrive Brake Control Solenoid Valve (UD/B)
4. Overdrive Clutch Control Solenoid Valve (OD/C)

5. SS-A Solenoid Valve (ON/OFF)
6. Torque Converter Control Solenoid Valve (T/CON)
7. Line Pressure Control Solenoid Valve
8. Oil temperature sensor

Line Pressure Control Solenoid Valve Schematic Diagrams

Circuit Diagram

Line Pressure Control Solenoid Valve Repair procedures

Inspection

1.	Turn ignition switch OFF.

2.	Remove the battery and battery tray. (Refer to Engine Electrical System - "Battery")

3.	Disconnect the solenoid valve connector (A).

4.	Measure resistance between sensor signal terminal and sensor ground terminal.

5.	Check that the resistance is within the specification.

Replacement

If necessary replace the valve body or solenoid valves, hydraulic adjustment is needed, replace the automatic transaxle assembly.

After the automatic transaxle assembly exchange, input the hydraulic calibration information of TCM.

1.	Perform the oil pressure characteristics input procedure. • Oil pressure characteristics(bar code) location • Oil-pressure characteristics input (Transmision exchange)

35R Clutch Control Solenoid Valve(35R/C_VFS) Description and Operation

Description

•	35R Clutch control solenoid valve(35R/C) is attached to the valve body.

•	This variable force solenoid valve directly controls the hydraulic pressure inside the 35R clutch.

35R Clutch Control Solenoid Valve(35R/C_VFS) Specifications

Specifications

Shape	Items	Specifications
	Control current(voltage) [mA]	0 ~ 1100
	Supply pressure [kpa (kgf/cm?, psi)]	1569.06 (16, 227.57)
	Control pressure [kpa (kgf/cm?, psi)]	0 ~ 1569.06 (0 ~ 16, 0 ~ 227.57)
	Internal resistance(?)	5.0 ~ 5.6

35R Clutch Control Solenoid Valve(35R/C_VFS) Components and Components Location

Components Location

1. 26 Brake Control Solenoid Valve (26/B)
2. 35R Clutch Control Solenoid Valve (35R/C)
3. Underdrive Brake Control Solenoid Valve (UD/B)
4. Overdrive Clutch Control Solenoid Valve (OD/C)

5. SS-A Solenoid Valve (ON/OFF)
6. Torque Converter Control Solenoid Valve (T/CON)
7. Line Pressure Control Solenoid Valve
8. Oil temperature sensor

35R Clutch Control Solenoid Valve(35R/C_VFS) Schematic Diagrams

Circuit Diagram

35R Clutch Control Solenoid Valve(35R/C_VFS) Repair procedures

Inspection

1.	Turn ignition switch OFF.

2.	Remove the battery and battery tray. (Refer to Engine Electrical System - "Battery")

3.	Disconnect the solenoid valve connector (A).

4.	Measure resistance between sensor signal terminal and sensor ground terminal.

5.	Check that the resistance is within the specification.

Replacement

If necessary replace the valve body or solenoid valves, hydraulic adjustment is needed, replace the automatic transaxle assembly.

After the automatic transaxle assembly exchange, input the hydraulic calibration information of TCM.

1.	Perform the oil pressure characteristics input procedure. • Oil pressure characteristics(bar code) location • Oil-pressure characteristics input (Transmision exchange)

Underdrive Brake Control Solenoid Valve(UD/B_VFS) Description and Operation

Description

•	Underdrive brake control solenoid valve(UD/B) is attached to the valve body.

•	This variable force solenoid valve directly controls the hydraulic pressure inside the underdrive brake.

Underdrive Brake Control Solenoid Valve(UD/B_VFS) Specifications

Specifications

Shape	Items	Specifications
	Control current(voltage) [mA]	0 ~ 1100
	Supply pressure [kpa (kgf/cm?, psi)]	1569.06 (16, 227.57)
	Control pressure [kpa (kgf/cm?, psi)]	0 ~ 1569.06 (0 ~ 16, 0 ~ 227.57)
	Internal resistance(?)	5.0 ~ 5.6

Underdrive Brake Control Solenoid Valve(UD/B_VFS) Components and Components Location

Components Location

1. 26 Brake Control Solenoid Valve (26/B)
2. 35R Clutch Control Solenoid Valve (35R/C)
3. Underdrive Brake Control Solenoid Valve (UD/B)
4. Overdrive Clutch Control Solenoid Valve (OD/C)

5. SS-A Solenoid Valve (ON/OFF)
6. Torque Converter Control Solenoid Valve (T/CON)
7. Line Pressure Control Solenoid Valve
8. Oil temperature sensor

Underdrive Brake Control Solenoid Valve(UD/B_VFS) Schematic Diagrams

Circuit Diagram

Underdrive Brake Control Solenoid Valve(UD/B_VFS) Repair procedures

Inspection

1.	Turn ignition switch OFF.

2.	Remove the battery and battery tray. (Refer to Engine Electrical System - "Battery")

3.	Disconnect the solenoid valve connector (A).

4.	Measure resistance between sensor signal terminal and sensor ground terminal.

5.	Check that the resistance is within the specification.

Replacement

If necessary replace the valve body or solenoid valves, hydraulic adjustment is needed, replace the automatic transaxle assembly.

After the automatic transaxle assembly exchange, input the hydraulic calibration information of TCM.

1.	Perform the oil pressure characteristics input procedure. • Oil pressure characteristics(bar code) location • Oil-pressure characteristics input (Transmision exchange)

Overdrive Clutch Control Solenoid Valve(OD/C_VFS) Description and Operation

Description

•	Overdrive clutch control solenoid valve(OD/C_VFS) is attached to the valve body.

•	This variable force solenoid valve directly controls the hydraulic pressure inside the overdrive clutch.

Overdrive Clutch Control Solenoid Valve(OD/C_VFS) Specifications

Specifications

Shape	Items	Specifications
	Control current(voltage) [mA]	0 ~ 1100
	Supply pressure [kpa (kgf/cm?, psi)]	1569.06 (16, 227.57)
	Control pressure [kpa (kgf/cm?, psi)]	0 ~ 1569.06 (0 ~ 16, 0 ~ 227.57)
	Internal resistance(?)	5.0 ~ 5.6

Overdrive Clutch Control Solenoid Valve(OD/C_VFS) Components and Components Location

Components Location

1. 26 Brake Control Solenoid Valve (26/B)
2. 35R Clutch Control Solenoid Valve (35R/C)
3. Underdrive Brake Control Solenoid Valve (UD/B)
4. Overdrive Clutch Control Solenoid Valve (OD/C)

5. SS-A Solenoid Valve (ON/OFF)
6. Torque Converter Control Solenoid Valve (T/CON)
7. Line Pressure Control Solenoid Valve
8. Oil temperature sensor

Overdrive Clutch Control Solenoid Valve(OD/C_VFS) Schematic Diagrams

Circuit Diagram

Overdrive Clutch Control Solenoid Valve(OD/C_VFS) Repair procedures

Inspection

1.	Turn ignition switch OFF.

2.	Remove the battery and battery tray. (Refer to Engine Electrical System - "Battery")

3.	Disconnect the solenoid valve connector (A).

4.	Measure resistance between sensor signal terminal and sensor ground terminal.

5.	Check that the resistance is within the specification.

Replacement

If necessary replace the valve body or solenoid valves, hydraulic adjustment is needed, replace the automatic transaxle assembly.

After the automatic transaxle assembly exchange, input the hydraulic calibration information of TCM.

1.	Perform the oil pressure characteristics input procedure. • Oil pressure characteristics(bar code) location • Oil-pressure characteristics input (Transmision exchange)

SS-A Solenoid Valve(ON/OFF) Description and Operation

Description

•	SS-A solenoid valve is attached to the valve body and is an on/off solenoid valve that is used to change gears.

•	SS-A Solenoid valve(ON/OFF) is installed at valve body.

SS-A Solenoid Valve(ON/OFF) Specifications

Specifications

? Control type : Normally low type

Shape	Items	Specifications
	Control current(voltage) [V]	9 ~ 16
	Supply pressure [kpa (kgf/cm?, psi)]	490.33 (5.0, 71.12)
	Control pressure [kpa (kgf/cm?, psi)]	0 ~ 490.33 (0 ~ 5.0, 0 ~ 71.12)
	Internal resistance(?)	10 ~ 11

SS-A Solenoid Valve(ON/OFF) Components and Components Location

Components Location

1. 26 Brake Control Solenoid Valve (26/B)
2. 35R Clutch Control Solenoid Valve (35R/C)
3. Underdrive Brake Control Solenoid Valve (UD/B)
4. Overdrive Clutch Control Solenoid Valve (OD/C)

5. SS-A Solenoid Valve (ON/OFF)
6. Torque Converter Control Solenoid Valve (T/CON)
7. Line Pressure Control Solenoid Valve
8. Oil temperature sensor

SS-A Solenoid Valve(ON/OFF) Schematic Diagrams

Circuit Diagram

SS-A Solenoid Valve(ON/OFF) Repair procedures

Inspection

1.	Turn ignition switch OFF.

2.	Remove the battery and battery tray. (Refer to Engine Electrical System - "Battery")

3.	Disconnect the solenoid valve connector (A).

4.	Measure resistance between sensor signal terminal and sensor ground terminal.

5.	Check that the resistance is within the specification.

Removal

1.	Remove the air cleaner assembly and air duct. (Refer to Engine Mechanical System - "Air cleaner")

Remove the drain plug (A) and drain the ATF totally and then reinstall the drain plug.

•	Replace the gasket before reinstalling the drain plug.

•	After the installation, start the engine and then check if there are any leakages from the drain plug.

3.	Remove the wiring mounting clip (A).

Disconnect the air breather hose (B) from the valve body cover.

Tightening torque :

9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

Disconnect the hose (A) after removing the automatic transaxle fluid cooler hose clamp.

•	Carefully install the clamp not to damage the hose.

•	Install the clamp in a correct direction not to be interfered with other parts.

•	After the installation, start the engine and then check if there are any leakages from the hose.

6.	Disconnect the ATF warmer hose (A).

Remove the mounting bolt of the heater pipe.

•	Carefully install the clamp not to damage the hose.

•	Install the clamp in a correct direction not to be interfered with other parts.

•	After the installation, start the engine and then check if there are any leakages from the hose.

Remove the valve body cover (A).

Tightening torque :

11.8 ~ 13.7 N.m (1.2 ~ 1.4 kgf.m, 8.7 ~ 10.1 lb-ft)

•	Replace the gasket (A) before reinstalling the valve body cover.

•	After the installation, start the engine and then check if there are any leakages from the valve body cover.

Disconnect the oil temperature sensor and solenoid valve connector (A) from the valve body.

Tightening torque :

9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

•	Check for the looseness, poor connection, bending, corrosion, contamination, deterioration, or damage before reinstalling the solenoid valve connector.

10.

Remove the valve body assembly (A).

Tightening torque :

9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

11.

Remove the ON/OFF solenoid valve (A).

•	When installing, apply the ATF oil or white vaseline to the O-ring (A) not to be damaged.

Installation

1.	To install, reverse the removal procedure.

2.	Check fluid level, after filling the automatic transaxle with fluid. (Refer to Hydraulic System - "Fluid")

3.	Perform the TCM adaptive values learning procedure. (Refer to Automatic Transaxle Control System - "Repair procedures")

Inhibitor Switch Description and Operation

Description

•	The inhibitor switch mounted on the upper of transaxle and connected with shifter lever.

•	The inhibitor switch has four points of contact and it makes the signals(S1, S2, S3, S4).

•	The inhibitor switch signals delivered at the TCM according to control of the shift lever positions(P, R, N, D) and it is used to control of the gear setting.

Inhibitor Switch Specifications

Specifications

? Type: Combination of output signals from 4 terminals

? Specifications

Items	Specifications
Power supply (V)	12
Output type	Combination of output signals

Inhibitor Switch Schematic Diagrams

Circuit Diagram

Inhibitor Switch Troubleshooting

Fault Diagnosis

Fault Diagnosis for Symptom

Major Symptom	Expected Cause	Items to Check and Measures
Shift lever inoperable	Faulty shift cable tension	Adjust shift cable tension (refer to "Automatic Transaxle System – Inhibitor Switch")
	Faulty shift cable assembly/connection	Check manual control valve assembly and re-assemble if necessary.
	Faulty shift cable bracket installation	Check cable installation on the shift lever assembly and repair if necessary.
Shock when shifting to and from D/R Motor run-up when shifting to and from D/R	Faulty inhibitor switch "N" setting	Use the "N" setting jig and adjust the "N" setting.
	Faulty inhibitor switch "N" setting	(refer to "Automatic Transaxle System – Inhibitor Switch")
	Faulty oil pressure in the valve body.	Replace valve body assembly or inspect/replace transaxle assembly
Faulty engine start Current gear not indicated in the Cluster Warning Lamp ON Engine stall while stopped Creeping not possible Auto parking release disabled	Faulty CAN terminating resistance/circuit	Check PCU/battery management system module.
	Faulty CAN terminating resistance/circuit	Check PCU wiring connector connection.
	Faulty power supply (IG.1) to inhibitor switch circuit	Check for gap on the junction box power terminal in the engine compartment and fuse (TCU2) connection. Repair terminal or exchange junction box if necessary.
	Faulty inhibitor switch circuit fuse	Check fuse and junction box terminal, and repair.
	Faulty inhibitor switch wiring connector	Check for foreign substance in the wiring connector, and check for gap on the terminal.
	Faulty inhibitor switch wiring connector	Check sealing on unused pin, and check for corrosion on the terminal.
	Faulty reverse lamp circuit	Check reverse lamp ground, and reassemble if necessary.
	Faulty inhibitor switch wiring ground	Check wiring ground, and reassemble if necessary.
	Faulty inhibitor switch circuit (unused code)	Inspect in accordance with the inspection flow, then replace inhibitor switch if necessary.
	Faulty inhibitor switch operation (faulty mid-range)	Inspect in accordance with the inspection flow, then replace inhibitor switch if necessary.

Inhibitor Switch Repair procedures

Inspection

Inspection flow of the inhibitor switch

Items to check

1.	Inspect DTC code.

Inspect whether N setting matches.

A.	Adjust N setting (refer to automatic transmission system - "inhibitor switch")

Inspect shift cable separation.

A.	Adjust shift cable separation (refer to automatic transmission system - "shift cable")

Inspect whether connector is connected.

A.	Inspect connector thoroughly for looseness, poor connection, bending, corrosion, contamination, deformation, or damage.

Turn ignition key "ON" and engine "OFF" and measure the power supplied to inhibitor switch circuit and voltage between ground.

Specification: approx. 12 V

C.	Fix the pin wiring when connector pin wiring is faulty. (refer to ETM - "wiring repair").

Inspect ground condition on reversing light circuit.

A.	Check the ground location of reversing light (refer to ETM - "harness location map").

B.	Reattach reversing light if ground condition is faulty.

Inspect wiring connection on junction box power terminal and fuse lamp.

A.	Check whether fuse holder is separated and holder is holding the fuse tight.

B.	Attach tester fuse to check if it is connected appropriately.

C.	Check whether fuse capacity is appropriate for each circuit.

D.	Check if fuse is damaged.

E.	Check pulling of fuse fixing wiring, inflow of foreign substance, and arrangement condition of terminal.

F.	Relocate the terminal that has been pulled and inspect using the method explained above.

G.	When problem is not solved, refer to the circuit diagram wiring repair instructions to fix or replace the terminal.

Inspect inhibitor switch signal.

A.	Turn ignition key "ON" and engine "OFF".

Measure the voltage between each terminal and chassis ground when shifting lever to "P, R, N, D" range.

Specified value: refer to specification "signal code" table

Removal

1.	Make sure vehicle does not roll before setting shift lever to "N" position.

2.	Disconnect the negative (-) battery cable.

3.	Remove the air cleaner assembly and air duct. (Refer to Engine Mechanical System - "Air cleaner")

4.	Remove the battery and battery tray. (Refer to Engine Electrical System - "Battery")

5.	Disconnect the inhibitor switch connector (A).

6.	Remove the shift cable mounting nut (B).

7.	Remove the manual control lever (B) and the washer after removing a nut (A).

8.	Remove the inhibitor switch(A) after removing the bolts (2ea).

Installation

1.	Check that the shift lever is placed in the "N" position.

2.	Lightly tighten the bolts(A) after installing the inhibitor switch(B).

3.	Lightly tighten the nut(A) after installing the manual control lever(B).

4.	Align the hole (A) in the manual control lever with the "N" position hole (B) of the inhibitor switch and then insert the inhibitor switch guide pin (SST No.:09480-A3800).

Tighten the nut (A) and bolts (B) with the specified torque.

Tightening torque :

A : 17.7 ~ 24.5 N.m (1.8 ~ 2.5 kgf.m, 13.0 ~ 18.1 lb-ft)

B : 9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

6.	Lightly tighten the nut(B) after connected the shift cable(C) in the manual control lever(D).

7.	Push shift cable(C) lightly to "F" direction shown to eliminate free play of shift cable.

Tighten the nut(B) with the specified torque.

Tightening torque :

9.8 ~ 13.7 N.m (1.0 ~ 1.4 kgf.m, 7.2 ~ 10.1 lb-ft)

9.	Remove the inhibitor switch guide pin (SST No.:09480-A3800) from the hole.

10.	Connect the inhibitor switch connector(A).

11.	Install the battery and battery tray. (Refer to Engine Electrical System - "Battery")

12.	Install the air cleaner assembly and air duct. (Refer to Engine Mechanical System - "Air cleaner")

13.	Connect the battery negative (-) cable.

14.	Check that operating surely at each range of the inhibitor switch corresponding to each position of shift lever.

Shift Lever Components and Components Location

Components Location

1. Shift lever knob & boots
2. Shift lever assembly
3. Shift cable

4. Manual control lever
5. Shift cable retainer
6. Snap pin

Shift Lever Repair procedures

Removal

1.	Pull the knob (A) in the direction of "F" and remove the knob.

2.	Disconnect the connector (B) from the shift lever.

3.	Disconnect the fixing clip (A) of wiring.

Disconnect the shift cable.

(1)	Remove the snap pin (A).

(2)	Disconnect the cable eye end (B) from the shift lever.

(3)

Disconnect the cable socket (C) from the shift lever.

•	Lug must assemble upward.

•	Bending area (A) must assemble the front.

•	Push in the cable socket at bracket of AT lever and must confirm that assembly sound and portion (A) of sock protrude from cap of socket. - Portion (A) located inside the cap before assembled. - Portion (A) must protrude after socket assembled.

Remove the bolts and then shift lever assembly (A).

Tightening torque :

8.8 ~ 13.7 N.m (0.9 ~ 1.4 kgf.m, 6.5 ~ 10.1 lb-ft)

Installation

To install, reverse the removal procedure.

•	Install the cable after placing the shift lever and the manual control lever in the N position.

Shift Cable Components and Components Location

Components Location

1. Shift lever knob & boots
2. Shift lever assembly
3. Shift cable

4. Manual control lever
5. shift cable retainer
6. Snap pin

Shift Cable Repair procedures

Removal

1.	Air cleaner assembly and air duct. (Refer to Engine Mechanical System - "Air cleaner")

2.	Battery and battery tray. (Refer to Engine Electrical System - "Battery")

3.	Remove the nut (A) from the manual control lever.

4.	Remove the shift cable (B) from the bracket (C) at transaxle side.

5.	Remove the floor console assembly. (Refer to Body - "Floor Consol")

Disconnect the shift cable.

(1)	Disconnect the cable eye end (B) from the shift lever.

(2)	Disconnect the cable socket (C) from the shift lever.

7.	Disconnect the shift cable retainer (A) after removing the nuts.

8.	Remove the shift cable by pulling it toward the interior.

Installation

Install the shift cable retainer (A).

Tightening torque :

11.8 ~ 14.7 N.m (1.2 ~ 1.5 kgf.m, 8.7 ~ 10.8 lb-ft)

•	Install the cable after placing the shift lever and the manual control lever in the N position.

Install the shift cable (A) in the shifter lever.

•	Lug must assemble upward.

•	Bending area (A) must assemble the front.

•	Push in the cable socket at bracket of AT lever and must confirm that assembly sound and portion (A) of sock protrude from cap of socket. - Portion (A) located inside the cap before assembled. - Portion (A) must protrude after socket assembled.

3.	Install the shift cable (B) in the cable bracket (C).

4.	Align the hole (E) in the manual control lever with the "N" position hole (F) of the inhibitor switch and then insert the inhibitor switch guide pin (SST No: 09480-A3800).

5.	Lightly tighten the nut (A) after connected the shift cable (B) in the manual control lever (D).

6.	Push shift cable (B) lightly to "F" direction shown to eliminate free play of shift cable.

Tighten the nut (A) to the specified torque.

Tightening torque :

9.8 ~ 13.7 N.m (1.0 ~ 1.4 kgf.m, 7.2 ~ 10.1 lb-ft)

8.	Remove the inhibitor switch guide pin (SST No.: 09480-A3800) from the hole.

9.	Install the airbag module. (Refer to Restraint - "Airbag Module")

10.	Install the floor console assembly. (Refer to Body - "Floor Consol")

11.	Install the air cleaner assembly. (Refer to Engine Mechanical System - "Air cleaner")

12.	Install the battery and battery tray. (Refer to Engine Electrical System - "Battery")

13.	Install the air duct. (Refer to Engine Mechanical System - "Air cleaner")

14.	Check that operating surely at each range of the inhibitor switch corresponding to each position of shift lever.

Automatic Transaxle Cooling System

Description and Operation Description • Engine coolant is used for circulating heat in order to heat and cool the transaxle oil. • Prevents over he ...

Driveshaft and axle

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