LUBRICANT
| Item | Specified lubricant | Quantity |
|---|---|---|
| Transaxle fluid liter (US qt, lmp.qt) | GENUINE DIAMOND ATF SP-III or SK ATF SP-III | 6.6 (6.9, 5.81) |
LUBRICANT SPECIFICATION
SEALANT
| Item | Specified sealant |
|---|---|
| Rear cover Torque converter housing Oil pan | LOCTITE FMD-546 |
SEALANT SPECIFICATION
FUNCTIONS
| Item | Contents |
|---|---|
| Components | The full line pressure variable control operates in the valve body to improve the fuel consumption. |
| The long travel damper clutch is applied to the torque converter to improve the engine revolution change reduction capability and the fuel consumption. (17~20°) | |
| The oil pump of the trochocentric type is changed to parachoid type to improve the processing and the capacity efficiency at the low RPM range. | |
| The disc type return spring is applied to the low & reverse brake to improve the durability and reduce the length. | |
| The hydraulic centrifugal oil pressure balance piston is applied to the inside of clutch to improve the durability and the shift control capability. | |
| The low noise gear and the gear teeth face grinding are applied to the transfer driven gear to improve the noise and the durability. | |
| Electronic control system | The oil pressure value set by TCM is coupled with the engine torque so that the stable shift feeling can be improved. |
| The engine torque reduction control operates effectively to improve the shift feeling and the durability. | |
| It can be the skip shift of 1<-->3 and 2<-->4 when shifting. | |
| The reverse clutch, not L/R brake is controlled when controlling the N-->R shift so that the N->R shift feeling can be improved. | |
| The range of the damper clutch direct control expands to improve the fuel consumption. | |
| The current control chip is installed into the TCM to regulate the solenoid control current and control the oil pressure securely according to the change of the temperature and voltage. | |
| The FPC (Flexible Printed Circuit) harness is composed of the thin and flat copper in the insulating film like electric wire. | |
| The tachometer is operated by the change of the frequency forwarded from the TCM to the instrument cluster, not vehicle speed sensor. |
FUNCTIONS REFERENCE CHART
Identifying Pharacoid Type And Trocoid Type Oil Pump. Scheme 155
OIL PUMP
The oil pump is made of the aluminum (the reaction shaft support) to loose the weight and selects the parachoid type to improve the processing and the capacity efficiency at the low RPM range.
BRAKES
The automatic transaxle (A4CF2) uses the low and reverse brake and the second brake. The low and reverse brake is fixed by the low and reverse annulus gear and overdrive planetary carrier at the 1st speed.
Scheme 156
- The disc type return spring is applied to the low and reverse brake and it minimizes the slip of the friction material from the uniform spring operation power to improve the durability and reduce the length. The overdrive sun gear is held on the transaxle case by the second brake at the 2nd speed. see scheme 4: Identifying Disc Type Return Spring On Low And Reverse Brake
CLUTCH
The multiple clutches and the one way clutch are used as the transaxle device.
The retainer of each clutch is composed of the precision sheet metal parts to realize the productivity and the light weight.
The hydraulic centrifugal oil pressure balance device places inside the clutch assembly.
Generally the oil remained in the piston oil pressure chamber pushes the piston by the centrifugal force. But to prevent the piston from being pushed, the oil filled in between the piston and the return spring retainer occurs the centrifugal force and both of the power is offset so that the piston don't move. In result, it improves the durability and the shift control ability.
Identifying Clutch Assembly Components. Scheme 157
1. UNDERDRIVE CLUTCH
The underdrive clutch is engaged at 1st, 2nd and 3rd speed.
The driving force of input shaft is delivered to the underdrive sun gear.
The operating oil pressure in the underdrive clutch components operates between the piston and the retainer
and pushes the piston to the clutch discs to deliver the driving force from the retainer to the hub.
Identifying Parking System Components. Scheme 158
2. REVERSE CLUTCH AND OVERDRIVE CLUTCH
The reverse clutch is engaged at the reverse and delivers the driving force of input shaft to the reverse sun gear. The overdrive clutch is engaged at the 3rd and 4th speed and delivers the driving force of input shaft to the overdrive planetary carrier and the low and reverse annulus gear.
The operating oil pressure of the reverse clutch operates between the reverse clutch retainer and overdrive clutch retainer and it has the whole overdrive clutch moved to deliver into the hub via retainer.
Identifying Reverse And Overdrive Clutch Components. Scheme 159
PARKING SYSTEM
The parking system for A4CF2 model is the cam type. The roller type installed to the existing new generation AT needs the support to move the roller when operating the parking system and is so complicated. But the cam type for A4CF2 model doesn't need the support and the structure is simply. It only needs the guide to prevent from moving the cam idly.
POWER TRAIN
| UD/C | OD/C | REV/C | 2-4/B | LR/B | OWC | |
|---|---|---|---|---|---|---|
| P | ||||||
| R | ||||||
| N | ||||||
| D1 | ||||||
| D2 | ||||||
| D3 | ||||||
| D4 | ||||||
| L |
OPERATING ELEMENT OF EACH SHIFTING RANGE
MAIN FEATURES
The VFS (Variable Force Solenoid) installed in the valve body is applied to transaxle (A4CF2). VFS varies the line pressure from 4.5bar to 10.5bar according to throttle open angle and shift range to improve the fuel consumption and shift ability.
And the reducing valve which is installed in the valve body makes the solenoid control pressure using the reducing pressure instead of the line pressure like the HIVEC transaxle.
The material of spool valve in the valve body is changed from the steel to aluminum to reduce the oil leakage by the thermal expansion between the valve body and spool valve at the high temperature.
The switch valve, the solenoid valve and the fail safe valve are operated to drive the vehicle at the 3rd speed and reverse even thought the malfunction of the electronic control parts occur.
Line Pressure Graph. Scheme 160
Hydraulic Circuit Diagram. Scheme 161
Electronic Control System Diagram. Scheme 162
SENSOR AND ACTUATOR FUNCTION
| ITEM | FUNCTION |
|---|---|
| Input shaft speed sensor | Detect the input shaft rpm (TURBINE RPM) at the OD/RVS retainer |
| Output shaft speed sensor | Detect the output shaft rpm (T/F DRIVE GEAR RPM) at the T/F drive gear |
| Engine rpm signal | Receive the engine rpm via CAN communication with ECM |
| Fluid temperature sensor | Detect the temperature of ATF through the thermistor |
| Brake switch | Detect the brake operation at the contact switch of the brake pedal |
| Inhibitor switch | Detect the position of select lever through the contact switch |
| ON/OFF solenoid valve | Control the hydraulic passage for the shift control |
| VFS solenoid valve | Change the line pressure from 4.5 bar to 10.5 bar according to throttle open angle and shift ranges |
| PCSV-A | Control the OD or L/R hydraulic pressure to the pressure control valve for shift control |
| PCSV-B | Control the 2/4 or REV hydraulic pressure to the pressure control valve for shift control |
| PCSV-C | Control the UD hydraulic pressure to the pressure control valve for shift control |
| PCSV-D | Control the hydraulic pressure for the damper clutch control |
| Torque reduction operation signal | Receive the signal of engine reduction pressure operation from ECM via CAN communication |
| Cluster | Send the signal of the current position of shift lever and vehicle speed and operate the lamp, distance meter and speed meter |
SENSOR AND ACTUATOR FUNCTION REFERENCE
TCM
The TCM which is adapted to the new small sized automatic transaxle (A4CF2) is integrated into the ECM and deliver information via CAN communication.
| ITEM | SIEMENS TCM |
|---|---|
| Hardware | Integrated type |
| Duty driving | Chopping method |
| Main oil pressure control components | Turbin torque, Vehicle speed |
| ATF Temp, compensation control | Independently |
| Direct control range | Wide |
ITEMS AND SIEMENS TCM REFERENCE
TLE6288 current control chip
The TLE6288 current control chip is installed into the TCM to regulate the solenoid control current and control the oil pressure securely according to the change of the temperature and voltage. In this case, the control signal of solenoid valve is divided into the Peak signal and the Hold signal.
- Peak : The 12 voltage signal applied to move the solenoid plunger quickly.
- Hold : The signal applied to keep holding the pulled solenoid valve.
ECM- TCM CAN COMMUNICATION ERROR MANAGEMENT
| No. | Item | Error management |
|---|---|---|
| 1 | Engine rpm | 3,000 RPM |
| 2 | Engine torque | 80% |
| 3 | Vehicle speed | 0 km/h |
| 4 | A/C Switch | OFF |
| 5 | Engine coolant temperature | 70°C |
| 6 | TPS | 50% |
| 7 | Shift range hold signal | OFF |
ECM- TCM CAN COMMUNICATION ERROR MANAGEMENT
Hydraulic Circuit Diagram (N Range, P Range). Scheme 163
Hydraulic Circuit Diagram (D Range (1ST)). Scheme 164
Hydraulic Circuit Diagram (D Range (2ND)). Scheme 165
Hydraulic Circuit Diagram (D Range (3RD)). Scheme 166
Hydraulic Circuit Diagram (D Range (4TH)). Scheme 167
Hydraulic Circuit Diagram (R Range). Scheme 168
Hydraulic Circuit Diagram (L Range). Scheme 169
ELEMENTS IN USE IN EACH GEAR
| UD/C | OD/C | REV/C | 2-4/B | LR/B | OWC | |
|---|---|---|---|---|---|---|
| P | ||||||
| R | ||||||
| N | ||||||
| D1 | ||||||
| D2 | ||||||
| D3 | ||||||
| D4 | ||||||
| L |
OPERATING ELEMENT OF EACH SHIFTING RANGE
STANDARD HYDRAULIC PRESSURE TABLE
| No. | Shift range position | Operation | Measuring | Oil pressure (kgf/cm 2 ) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PCSV-A | PCSV-B | PCSV-C | PCSV-D | ON/OFF | LR | 2/4 (2ND) | UD | OD | REV | |||
| 1 | D | 0 | 100 | 0 | 0 | ON | LR | 10.5±0.2 | 0 | 10.5±0.2 | 0 | 0 |
| 2 | ↑ | 50 | ↑ | ↑ | ↑ | ↑ | ↑ | 5.3±0.4 | ↑ | ↑ | ↑ | ↑ |
| 3 | ↑ | 75 | ↑ | ↑ | ↑ | ↑ | ↑ | 1.0±0.3 | ↑ | ↑ | ↑ | ↑ |
| 4 | ↑ | 100 | ↑ | ↑ | ↑ | ↑ | ↑ | 0 | ↑ | ↑ | ↑ | ↑ |
| 5 | ↑ | ↑ | 0 | ↑ | 100 | OFF | 2/4 (2ND) | 0 | 10.5±0.2 | ↑ | ↑ | ↑ |
| 6 | ↑ | ↑ | 50 | ↑ | ↑ | ↑ | ↑ | ↑ | 5.3±0.4 | ↑ | ↑ | ↑ |
| 7 | ↑ | ↑ | 75 | ↑ | ↑ | ↑ | ↑ | ↑ | 0.9±0.3 | ↑ | ↑ | ↑ |
| 8 | ↑ | ↑ | 100 | ↑ | ↑ | ↑ | ↑ | ↑ | 0 | ↑ | ↑ | ↑ |
| 9 | ↑ | 0 | ↑ | ↑ | ↑ | ↑ | OD | ↑ | ↑ | ↑ | 10.5±0.2 | ↑ |
| 10 | ↑ | 50 | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | 5.6±0.4 | ↑ |
| 11 | ↑ | 75 | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | 1.0±0.3 | ↑ |
| 12 | ↑ | 100 | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | 0 | ↑ |
| 13 | ↑ | ↑ | ↑ | 0 | 0 | ↑ | UD | ↑ | ↑ | 10.5±0.2 | ↑ | ↑ |
| 14 | ↑ | ↑ | ↑ | 50 | ↑ | ↑ | ↑ | ↑ | ↑ | 5.6±0.4 | ↑ | ↑ |
| 15 | ↑ | ↑ | ↑ | 75 | ↑ | ↑ | ↑ | ↑ | ↑ | 1.0±0.3 | ↑ | ↑ |
| 16 | ↑ | 0 | ↑ | 100 | ↑ | ↑ | ↑ | ↑ | ↑ | 0 | ↑ | ↑ |
| 17 | R | ↑ | 0 | ↑ | ↑ | ON | REV | 17.7±0.8 | ↑ | ↑ | ↑ | 17.7±0.8 |
| 18 | ↑ | ↑ | 50 | ↑ | ↑ | &uarr | ↑ | ↑ | ↑ | ↑ | ↑ | 8.7±0.8 |
| 19 | ↑ | ↑ | 75 | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | 0.9±0.5 |
| 20 | ↑ | ↑ | 100 | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | ↑ | 0 |
| [Measure condition] • Oil pump revolution : 2500rpm • LPCSV Duty ratio : 0% NOTE: The oil pressure values of "0" marked on the above table must measure less than 0.1 kgf/cm 2 when testing. * The values are subject to change according to vehicle model or condition. | ||||||||||||
| NOTE |
|---|
| The oil pressure values of "0" marked on the above table must measure less than 0.1 kgf/cm 2 when testing. |
STANDARD HYDRAULIC PRESSURE TABLE
MONITOR SCANTOOL DATA
- Connect scantool to data link connector (DLC).
- Ignition "ON".
- Confirm the "ROM I.D".
- Perform the "ROM UP-DATE".
- Perform the Re-diagnosis.
- Is "DTC" disappeared? YES Fault is intermittent caused by poor contact in the sensor's and/or PCM/TCM's connector or was repaired and PCM/TCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration or damage. Repair or replace as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-287431-S15316439262008061200000) " procedure. NO Replace PCM/TCM as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-287431-S15316439262008061200000) " procedure.
VERIFICATION OF VEHICLE REPAIR
After a repair, it is essential to verify that the fault has been corrected.
- Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode
- Using a scantool, clear DTC
- Operate the vehicle within DTC Enable conditions in general information.
- Are any DTCs present ? YES Go to the applicable troubleshooting procedure. NO System performing to specification at this time.
Identifying Transaxle Range Switch. Scheme 170
After a repair, it is essential to verify that the fault has been corrected.
- Connect scantool and select "Diagnostic Trouble Codes (DTCs)" mode.
- Using a scantool, Clear DTC.
- Operate the vehicle within DTC Enable conditions in General information.
- Are any DTCs present? YES Go to the applicable troubleshooting procedure. NO System performing to specification at this time.
SIGNAL WAVEFORM
Refer to DTC P0707 .
Refer to DTC P0707 .
Refer to DTC P0707 .
Scheme 171
After a repair, it is essential to verify that the fault has been corrected.
- Connect scantool and select "Diagnostic Trouble Codes (DTCs)" mode.
- Using a scantool, Clear DTC.
- Operate the vehicle within DTC Enable conditions in General information.
- Are any DTCs present? YES Go to the applicable troubleshooting procedure. NO System performing to specification at this time.
Refer to DTC P0711 .
Refer to DTC P0711 .
Refer to DTC P0711 .
Refer to DTC P0711 .
Scheme 172
After a repair, it is essential to verify that the fault has been corrected.
- Connect scan tool and select "Diagnostic Trouble Codes (DTCs)" mode.
- Using a scan tool, Clear DTC.
- Operate the vehicle within DTC Enable conditions in General information.
- Are any DTCs present? YES Go to the applicable troubleshooting procedure. NO System performing to specification at this time.
Refer to DTC P0716 .
Refer to DTC P0716 .
Refer to DTC P0716 .
Scheme 173
Refer to DTC P0716 .
Scheme 174
After a repair, it is essential to verify that the fault has been corrected.
- Connect scantool and select "Diagnostic Trouble Codes (DTCs)" mode.
- Using a scantool, Clear DTC.
- Operate the vehicle within DTC Enable conditions in General information.
- Are any DTCs present ? YES Go to the applicable troubleshooting procedure. NO System performing to specification at this time.
Scheme 175
Refer to DTC P0731 .
Scheme 176
Refer to DTC P0731 .
Scheme 177
Refer to DTC P0731 .
Scheme 178
After a repair, it is essential to verify that the fault has been corrected.
- Connect scantool and select "Diagnostic Trouble Codes (DTCs)" mode.
- Using a scantool, Clear DTC.
- Operate the vehicle within DTC Enable conditions in General information.
- Are any DTCs present ? YES Go to the applicable troubleshooting procedure. NO System performing to specification at this time.
- Connect scantool to data link connector (DLC).
- Engine "ON".
- Select "D RANGE" and drive vehicle.
- Monitor the "TORQUE CONVERTER (DAMPER) CLUTCH" parameter on the scantool. Specification: TCC SLIP > 5RPM see scheme 79: Scantool Display - TORQUE CONVERTER (DAMPER) CLUTCH Parameter
- Is TCC SLIP within specifications? YES Fault is intermittent caused by poor contact in the sensor's and/or TCM (PCM)'s connector or was repaired and TCM (PCM) memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration or damage. Repair or replace as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-287431-S08638528312008061200000) " procedure. NO Go to " «COMPONENT INSPECTION»(ref-287431-S33758345812008061200000) " procedure.
Scheme 179
- CHECK TORQUE CONVERTER CLUTCH SOLENOID VALVE Connect scantool to data link connector (DLC). Ignition "ON" & Engine "OFF". Select A/T solenoid valve actuator test and operate actuator test. Is Actuator Testing performed normally? see scheme 80: Scantool Display - ACTUATION TEST YES Go to 2 "Check OIL PRESSURE" as below. NO Repair or replace as necessary and then go to " «VERIFICATION OF VEHICLE REPAIR»(ref-287431-S08638528312008061200000) " procedure.
- CHECK OIL PRESSURE see scheme 81: Identifying DR Port Connect oil pressure gauge to "DR" port. Ignition "ON" & Engine "OFF". After connecting scantool and monitor the "TCC SOLENOID VALVE DUTY" parameter on the scantool data list. Select 1st gear and accelerate Engine speed to 2500 rpm. Measure oil pressure. Specification: approx. Above 5.1~7.1 kg/cm 2 (500~696kpa, 72.5~100.99psi) Is oil pressure value within specification? YES Repair TORQUE CONVERTER CLUTCH (REPLACE Torque Converter) as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-287431-S08638528312008061200000) " procedure. NO Replace A/T assembly (possible to BODY CONTROL VALVE faulty) as necessary and Go to " «VERIFICATION OF VEHICLE REPAIR»(ref-287431-S08638528312008061200000) " procedure.
Refer to DTC P0741 .
Scheme 180
Refer to DTC P0741 .
Scantool Display - VF SOL. VALVE Parameter. Scheme 181
- Connect scantool to data link connector (DLC).
- Engine "ON".
- Monitor the "VF SOL. VALVE" parameter on the scantool.
- Shift gear at each position.
YES
- Fault is intermittent caused by poor contact in the sensor's and/or TCM (PCM)'s connector or was repaired and TCM (PCM) memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration or damage. Repair or replace as necessary and go to " «VERIFICATION OF VEHICLE REPAIR»(ref-287431-S24861615842008061200000) " procedure.
NO
- Go to " «TERMINAL & CONNECTOR INSPECTION»(ref-287431-S09427068122008061200000) " procedure.
Refer to DTC P0741 .
Refer to DTC P0743 .
Refer to DTC P0741 .
Refer to DTC P0743 .
Refer to DTC P0743 .
After a repair, it is essential to verify that the fault has been corrected.
- Connect scantool and select "Diagnostic Trouble Codes (DTCs)" mode.
- Using a scantool, Clear DTC.
- Operate the vehicle within DTC Enable conditions in General information.
- Are any DTCs present? YES Go to the applicable troubleshooting procedure. NO System performing to specification at this time.
After a repair, it is essential to verify that the fault has been corrected.
- Connect scantool and select "Diagnostic Trouble Codes (DTCs)" mode.
- Using a scantool, Clear DTC.
- Operate the vehicle within DTC Enable conditions in General information.
- Are any DTCs present? YES Go to the applicable troubleshooting procedure. NO System performing to specification at this time.
Refer to DTC U0001 .
Refer to DTC U0001 .
Refer to DTC U0001 .
Scheme 182
Scheme 183
PWM (PULSE WIDTH MODULATION) SOLENOID
| Range | PWM solenoid valve | ||||
|---|---|---|---|---|---|
| PCSV-A | PCSV-B | PCSV-C | PCSV-D | ON, OFF | |
| N, P | OFF | ON | ON | OFF | ON |
| 1st | ON | ON | OFF | OFF | ON |
| 2nd | ON | OFF | OFF | ON | OFF |
| 3rd | OFF | ON | OFF | ON | OFF |
| 4th | OFF | OFF | ON | ON | OFF |
| Reverse | OFF | OFF | ON | OFF | ON |
| LOW | OFF | ON | OFF | OFF | ON |
PULSE WIDTH MODULATION SOLENOID VALVE POSITION REFERENCE
PWM Solenoid Valve Pressure Graph. Scheme 184
PWM solenoid valve is controlled linearly according to the duty ratio.
Oil pressure range: 0~4.3 kgf/cm 2 (0~422kpa, 0~61.2psi)
| Type | 3way & Normal High |
|---|---|
| Supply voltage | 12V |
| Coil resistance | 3.2±0.2ohms (at 25°C, 77°F) |
| Cycle | 50Hz |
VOLTAGE AND RESISTANCE SPECIFICATION
Identifying PWM Solenoid Valve. Scheme 185
Scheme 186
- Remove the battery terminal.
- Lift the vehicle.
- Remove the under cover.
- Loosen the drain plug and drain the transaxle oil.
- Remove the oil pan.
- Remove the oil filter.
- Remove the valve body (refer to Valve Body Disassembly in overhaul)
- Disconnect the main harness (A) from valve body. see scheme 205: Disconnecting Main Harness From Valve Body
- Remove the solenoid valve assembly (A).
Identifying Solenoid Valve Assembly. Scheme 187
Scheme 188
- Install the solenoid valve. CAUTION: Apply the ATF oil or White Vaseline to the O-ring not to be damaged.
- Connect the solenoid valve connector to the valve body. CAUTION: When connecting the solenoid valve connector, check the connector for rust, dirt, or oil, then reconnect it.
- Install the valve body (refer to Valve Body Reassembly in overhaul) TORQUE: 10~12Nm (1.0~1.2kgf.m, 7~8lb-ft)
- Install the oil filter. TORQUE: 10~12Nm (1.0~1.2kgf.m, 7~8lb-ft)
- Continue to apply liquid gasket at application points at the oil pan with 02.5mm (0.098in) thickness. Liquid gasket Part name: Threebond 1281B (Scheme 186): Identifying Liquid Gasket On Oil Pan
- Tighten the mounting bolt with the specified torque after installing the oil pan. TORQUE: 10~12Nm (1.0~1.2kgf.m, 7~8lb-ft)
- Install the drain plug. TORQUE: 35~45Nm (3.5~4.5kgf.m, 25~32lb-ft)
- Installation is the reverse of the removal.